Caldera activity volcanic eruptions. Medical search. Frequent questions

Even so, the math doesn't work out for the volcano to be "overdue" for an eruption. (usgs.gov)
How far in advance could scientists predict an eruption of the Yellowstone volcano? (usgs.gov)
The region is home to a caldera, a cauldron-shaped depression left behind by the eruption of a very large volcano. (kfor.com)
Although a cataclysmic eruption of the Yellowstone volcano is unlikely in the foreseeable future, real-time monitoring of seismic activity, volcanic gas concentrations, geothermal activity, and ground deformation helps ensure public safety. (nps.gov)
The volcano has been dormant since, but in its collapsed caldera, at the rim of one of two lakes, is evidence of enduring volcanic activity by way of an undeveloped hot springs. (traveloregon.com)
During volcanic activity, the volcano mostly ejects basaltic lava and small amounts of tephra. (worldatlas.com)
The North Island abounds with volcanic activity , from the iconic Mount Taranaki cone volcano thrusting to the sky from an otherwise flat plateau, to the much bigger caldera "super volcanoes", like the one that both formed and still lurks below the entirety of lake Taupō, and finally to the wide volcanic fields where one-off eruptions pepper large swathes of land like beneath the Auckland region. (futurelearn.com)
The volcanic eruptions appeared on seven screens arranged elliptically, and the installation evoked the form of a caldera (the funnel-shaped crater situated in the cone of a volcano), which the visitor was invited to enter. (palazzoesposizioni.it)
In fact, the entire island represents leftovers of a gigantic volcano that violently erupted about 10,000 years ago creating an underwater caldera (a blast hole) in the central part of the volcano. (expeditions.com)
ROME: Half a million people live on a sprawling volcano in Italy -- and the risk of an eruption has never been greater, according to a study published Friday. (com.pk)
But the Campi Flegrei is not one to take lightly -- the volcano´s eruption 30,000 years ago is reported to have contributed to the extinction of Neanderthal man. (com.pk)
One could be forgiven for not realising its danger though, because instead of growing into a traditional mountain, the volcano has the shape of a gentle depression 12-14 kilometres (7.5-8.5 miles) across.A resurgence of activity in the early 1980s led to the evacuation of 40,000 inhabitants, but the volcano has been relatively quiet since then. (com.pk)
The tens of thousands of small earthquakes that have taken place since the 1950s weakened the caldera, the basin at the top of the volcano. (com.pk)
Determining if a volcano is active usually comes down to the time since the last eruption . (a-z-animals.com)
If a volcano has shown any activity in the past 10,000 years, it's classified as active though there are always exceptions to the rule. (a-z-animals.com)
The way that this volcano erupts is used as an example by which other eruptions are compared. (a-z-animals.com)
This volcano is considered overdue for an eruption and there is a significant human population living around it. (a-z-animals.com)
In fact, the slow and steady lava lake activity in Halemaʻumaʻu crater has been quite fascinating, so it deserves another "Volcano Watch" visit. (bigislandvideonews.com)
Volcano observer Aris Yanto captured video of lava pulsing into the air from a new cone that appears to have formed in this eruption. (nasa.gov)
Steam and other volcanic gases frequently stream from Pagan Volcano, in the Northern Mariana Islands. (nasa.gov)
Geologists with the Yellowstone Volcano Observatory (YVO) released a report regarding tectonic, volcanic and otherwise explosive activity at Yellowstone National Park. (newstarget.com)
Hawaiian Volcano Observatory scientists monitoring the eruption today noted that spatter from the fountain near the southeast edge of the island in the center of the lava lake (that formed during the December 2020-May 2021 eruption) is constructing a small cone on the island. (bigislandvideonews.com)
The USGS Hawaiian Volcano Observatory reports seismicity and volcanic gas emission rates remain elevated. (bigislandvideonews.com)
The Campo Flegrei volcano last erupted in 1538 however earthquakes have been common in the area since 1950, with a surge of seismic activity in the early 1980s. (wantedinrome.com)
Or is the volcano slowly "dying" although the last eruption ended in July 2009 has been one of the longest ever recorded? (scienceblogs.com)
Earlier this year many people including me have been able to monitor in real-time the Redoubt Volcano (Alaska) eruption thanks to the open efforts of the people of Alaska Volcano Observatory (AVO) who made all data public. (scienceblogs.com)
One intriguing thing at Etna is that the more explosive eruptions in recent millennia have often been related to the very fast uprise of primitive and volatile-rich magma (such as picrite in the 4ka B.P. eruption), and in the past 30-40 years, there is a clear influx of more primitive magma into the feeding system of this volcano. (scienceblogs.com)
On many occasions, however, volcanic quakes are generated by the movement of molten rock materials inside a volcano, or when magma is being extruded to the outside. (nzdl.org)
Most of the hazards are directly caused by volcanic eruptions which usually involve expressive flows of hot and usually molten materials out of the volcano s crater. (nzdl.org)
This could indicate an ancient, collapsed caldera from a now-extinct volcano. (livescience.com)
There isn't much known about the eruptive history of the volcano - checking out the Global Volcanism Program, the last activity at Sinabung might have been an explosive event in 1881 with persistent fumaroles up until 1912. (scienceblogs.com)
However, most news sources are quoting 400 years as the last known eruption of the volcano, apparently information from the Indonesian government. (scienceblogs.com)
As I briefly mentioned earlier, Galeras in Colombia had an "atypical" eruption - apparently meaning it was non-explosive - that has prompted evacuations and a change in the alert status to "Red" for the volcano. (scienceblogs.com)
Volcano Island in the caldera lake at Taal. (scienceblogs.com)
The Philippine government is upping its concern about an eruption at Taal - and cracking down on tourists and resorts trying to get near Volcano Island in the volcano's caldera lake. (scienceblogs.com)
A partially-eroded scoria cone in the Taal volcano caldera. (scienceblogs.com)
Now, the Philippine government is taking this threat very serious, sending divers, helicopters, rescue equipment and medical teams to the area near the volcano in case an eruption occurs. (scienceblogs.com)
Continue sailing inside the crescent-shaped Caldera, close to the volcano, and enjoy a final dip in the Hot Springs, before sailing back to Oia as the day ends with a spectacular sunset. (vueling.com)
But on Jan. 3, 1983, the volcano began one of its longest (and largest) eruptions, shooting a fountain of lava hundreds of meters into the air. (earthmagazine.org)
Over hundreds of thousands of years of repeated eruptions, this shield volcano grew into the immense mountain it is today. (earthmagazine.org)
The volcano is nearly invisible, tucked away in the southeast corner of the Big Island, as its four older, more massive volcanic siblings compete for the horizon. (earthmagazine.org)
The most recent eruption of Mount Rinjani, an active volcano on the Indonesian island of Lombok, occurred in 2016. (selamatpagibali.com)
This volcano-tectonic-type superficial seismicity is associated with the formation of micro-fractures in the volcanic edifice. (lechaudrondevulcain.com)
In the past 24-hour period, the Taal Volcano Network recorded thirty-eight (38) volcanic earthquakes, including twelve (12) volcanic tremor events having durations of one (1) to five (5) minutes, twenty-five (25) low-frequency volcanic earthquakes, one (1) hybrid event, and low-level background tremor that has persisted since 07 July 2021. (lechaudrondevulcain.com)
Johan Christian Dahl (1788-1857), Eruption of the Volcano Vesuvius , 1821. (cdc.gov)
This month's cover image, Eruption of the Volcano Vesuvius, 1821, is the first in a series of paintings he created after that experience. (cdc.gov)
Art historian Maia Heguiaphal writes, "The vast smoke coming out of the incandescent lava immediately attracts the viewer's eyes, but the background of the volcano intensifies the effect of destruction carried by the eruption. (cdc.gov)

Volcanic activities and eruption sequence of the large-scale eruption at Shikotsu, Toya, Nigorikawa and Daisen Volcanoes" (PDF) (in Japanese). (wikipedia.org)
Volcanoes do not work in predictable ways and their eruptions do not follow predictable schedules. (usgs.gov)
This caldera is one of the world's largest volcanoes and has had a dramatic impact on the shape of this whenua (land). (futurelearn.com)
To geologists, it's one of the world's most formidable volcanoes - a caldera. (kidzgo.co.nz)
Forecasting future activity and hazards from active calderas, and indeed from volcanoes in general, requires knowledge of the pre-eruptive magma storage. (nature.com)
HAWAIʻI VOLCANOES NATIONAL PARK - The lava lake has risen approximately 27 meters, or 89 feet, since the start of the eruption. (bigislandvideonews.com)
As of Sunday morning, all lava activity is confined to the summit caldera within Hawai'i Volcanoes National Park. (bigislandvideonews.com)
VOLCANIC quakes are those recorded from within active volcanoes and sometimes, their mechanism may be similar to that of tectonic quakes. (nzdl.org)
These include submarine or coastal landslides, pyroclastic flows from oceanic or partly submerged volcanoes, caldera collapse and mudflows entering the sea. (nzdl.org)
Two volcanoes along the edge of the north Pacific had explosive eruptions over the weekend. (scienceblogs.com)
Kilauea's 3-kilometer-by-5-kilometer caldera sits in the middle of Hawaii Volcanoes National Park. (earthmagazine.org)
If and when these volcanoes blow, they will likely cause much more damage than Kilauea's eruptions. (earthmagazine.org)
Geosciences professor Erik Klemetti notes, "With our modern ability to monitor volcanoes in many remote locations thanks to satellites, and the speed with which news travels around the globe today, an eruption that might have gone unnoticed 100 years ago is bound to make headlines in 2018. (cdc.gov)

All of this geologic activity formed the mountains, canyons, and plateaus that define the natural wonder that is Yellowstone National Park. (nps.gov)
During the eruption, the magma chamber was partially emptied which caused the roof to collapse, forming a giant caldera that covers the bigger portion of Yellowstone National Park. (vacationidea.com)
The Yellowstone Caldera in Yellowstone National Park was created at least 631,000 years ago by a massive eruption resulting from a volcanic hotspot. (a-z-animals.com)

These uninhabited islands, located in the center basin of Santorini, were created by a series of volcanic eruptions 3,500 years ago. (princess.com)
A series of volcanic eruptions that started about 23 million years ago eventually gave rise to Mount Rinjani. (selamatpagibali.com)

Geologically separate from the other nearby lakes, Rotorua formed in a caldera (crater caused by a volcanic eruption) about 200,000 years ago. (teara.govt.nz)
A volcanic eruption around 1650 B.C. caused the center of the island to implode into the sea, forming a huge water-filled crater called the "caldera," which legend proclaims to be the lost city of Atlantis. (princess.com)
Mount Ruapehu - is the highest mountain in the North Island, with a volcanic crater lake at its summit and Whakapapa and Turoa ski fields on its slopes. (kidzgo.co.nz)
Between 2004 and 2008, more volcanic activity occurred creating a lava dome in the crater made by the 1980 eruption. (a-z-animals.com)
The most recent (as at July 15, 2023) eruption began June 7, 2023 and ended June 19, 2023, following a series of earthquakes in which multiple vents spewed lava within Halemaʻumaʻu, the pit crater in the volcano's summit caldera, and built a fissure cinder cone about 40 meters (130 feet) high. (a-z-animals.com)
The second thing that is interesting about the current activity is the manner in which the lava is refilling the crater. (bigislandvideonews.com)
Time-lapse video recorded by USGS webcams captured the activity in the crater. (bigislandvideonews.com)
No such crater was discovered, leading to the conclusion that the planet's internal tectonic activity was the cause. (watchers.news)
VOLCANIC ERUPTION is the process wherein molten rock materials (collectively called magma or lava) are emitted or ejected in the form of flowing masses (lava flows and pyroclastic flows), discrete particles (volcanic ash and pyroclastic) and steam (water vapor and gases) from a crater, vent or fissure. (nzdl.org)
Another hazard that is also directly related to volcanic eruption is the fall of volcanic materials ejected from the crater. (nzdl.org)
The Halema`uma`u crater located within the caldera is currently erupting. (earthmagazine.org)
The real breathtaking view, however, is saved for the observatory, which is precariously perched on the edge of the northern caldera rim, only a stone's throw from the pond of lava that sits deep inside the caldera's Halema`uma`u crater, one source of Kilauea's current eruption. (earthmagazine.org)
Activity at the Main Crater was dominated by upwelling of hot volcanic fluids in its lake which generated plumes 1,500 meters tall that drifted southeast. (lechaudrondevulcain.com)

Continued geothermal activity around the lake, notably at Sulphur Flats (Te Arikiroa), is a reminder of its volcanic origins. (teara.govt.nz)
Within the ice filled Grimsvötn caldera intense geothermal activity continuously melts the ice to form a subglacial lake, which at intervals of 5 to 10 years is emptied along subglacial channels to create large floods (jökulhlaup) on the sandur plain, Skeidararsandur, on the Icelandic south coast. (mtu.edu)
Swarms are associated with geothermal activity, and the lack of swarm activity implies a lack of heightened activity from the supervolcano. (newstarget.com)

One of the largest volcanic eruptions known to have occurred in the world, creating one of the largest known calderas. (nps.gov)
Santorini feels like no other place on earth: an ancient island that endured one of the largest volcanic eruptions in history. (hiddentrails.com)

The most recent volcanic eruption at Yellowstone, a lava flow on the Pitchstone Plateau, occurred 70,000 years ago. (usgs.gov)
However, the most recent volcanic eruption took place on February 27, 2017. (worldatlas.com)

First documented Supervolcanic eruption, and last known volcanic eruption with a VEI of 8. (wikipedia.org)

Since the most recent giant ( caldera-forming ) eruption 631,000 years ago, approximately 80 relatively nonexplosive eruptions have occurred. (usgs.gov)

The most likely explosive event to occur at Yellowstone is actually a hydrothermal explosion (a rock hurling geyser eruption) or a lava flow. (usgs.gov)
From Bacon and others (2014): "The oldest recognized postglacial explosive eruption, andesitic Aniakchak I, left nonwelded ignimbrite in valleys below the edifice and fines-poor welded ignimbrite or agglutinated fall deposits high on its flanks between ca. 9,500 and 7,000 years ago. (alaska.edu)
In the afternoon of September 29 a warning was issued to national and international aviation authorities that an explosive (phreatic) eruption might be expected within the near future and an ash cloud might interfere with the dense air traffic across the Atlantic. (mtu.edu)
So the possibility of highly explosive eruptions is real. (scienceblogs.com)
And, overall, I guess that the probability that we will see a major flank eruption from vents at very low elevation on the flank of Etna - like in 1669 - is much higher than that of a large and potentially devastating explosive eruption. (scienceblogs.com)
Today was a doubleheader for volcanic eruptions in the news: Today's explosive eruption from Mt. Etna. (scienceblogs.com)
Not much out there on the details of the eruption beyond this intriguing statement: Diego Gomez from the Pasto Observatory of Vulcanology and Seismology said that due to the atypical, non-explosive eruption, another eruption is imminent. (scienceblogs.com)
We have some more details on both of the eruptions, so I'll pass them on: Bezymianny KVERT is excited because they claim to have predicted the explosive eruption of Bezymianny almost to the day. (scienceblogs.com)
Once inside the park, however, the evidence is everywhere: Huge, scattered igneous boulders serve as remnants of past explosive eruptions and steam vents line the road, while gassy, yellowish brown tinted plumes snake high up into the atmosphere. (earthmagazine.org)

The eruption of Lake Toba was the biggest volcanic eruption in the Quaternary period. (wikipedia.org)
Over 26,000 years ago Taupo exploded in the biggest volcanic eruption the world has known in the last 70,000 years - the Oruanui eruption. (kidzgo.co.nz)

Yellowstone was the site of a catastrophic volcanic eruption more than 600,000 years ago. (vacationidea.com)
Did the catastrophic volcanic eruption that ravaged Santorini circa 1600 B.C. destroy Crete's ancient Minoan civilization - and give birth to the myth of Atlantis? (princess.com)
Large calderas are collapse structures formed by the catastrophic evacuation of magma from the tops of upper crustal silicic magma reservoirs. (nature.com)

Vesuvius wiped Pompeii off the map almost two millennia ago, while the vast volcanic Campi Flegrei area near Naples last spewed lava, ashes and rocks in 1538. (com.pk)
Italy's volcanic Campi Flegrei or Phlegraean Fields area near Naples was shaken by a 4.0-magnitude earthquake on Monday night, the latest in a series of recent tremors. (wantedinrome.com)

Declared a regional park 20 years ago, the Phlegraean Fields area is a highly seismic zone of supervolcanic calderas, situated to the west of Naples. (wantedinrome.com)

All of the known volcanic eruptions at Raung have occurred within that caldera. (nasa.gov)

The United States Geological Survey notes, "Gaseous emissions from volcanic vents over hundreds of millions of years formed the Earth's earliest oceans and atmosphere, which supplied the ingredients vital to evolve and sustain life. (cdc.gov)

An eventual eruption could be preceded by relatively weak signals, such as a smaller rate of ground uplift and fewer earthquakes," the study´s authors said in a press release. (com.pk)
They point to the eruption of the Rabaul caldera in Papua New Guinea 1994, which was preceded by small earthquakes occurring at a tenth of the rate than had occurred during a crisis a decade before. (com.pk)
The Yellowstone Supervolcano, commonly referred to as the Yellowstone Caldera, was hit by more than 40 earthquakes in April, heightening concerns that the supervolcano is about to erupt . (newstarget.com)
The report indicated that a total of 43 earthquakes occurred in the region in and around the National Park in April and that the tremors were accompanied by three eruptions from the famous Steamboat Geyser. (newstarget.com)
More earthquakes happening at Yellowstone which again may be precursors to an eruption," wrote another person. (newstarget.com)
Swarm activity refers to a sequence of small earthquakes with no identifiable mainshock. (newstarget.com)
This level of activity is considered more normal, since more than 3,000 earthquakes are detected in the National Park each month. (newstarget.com)
None of the earthquakes detected have been interpreted by the USGS as a sign of an upcoming eruption. (newstarget.com)
EARTHQUAKES are ground vibrations caused by rock failure or volcanic activity. (nzdl.org)
TSUNAMI - are large sea waves generated by underwater or near-shore earthquakes or volcanic eruptions. (nzdl.org)
Not all submarine earthquakes or volcanic eruptions, however, cause tsunami. (nzdl.org)
This earthquake swarm was caused by upward fluid movement through a complex network of faults," study lead author Keisuke Yoshida , an Earth scientist at the Research Center for Prediction of Earthquakes and Volcanic Eruptions at Tohoku University in Japan, told Live Science. (livescience.com)
6 Warm Cloud Avalanche (PA) earthquakes, 1 shallow volcanic earthquake (VTB), 62 low frequency earthquakes (LF), 68 multi-phase earthquakes (MP), 1,978 avalanche earthquakes (RF), 1,289 emission earthquakes (DG), 3 tectonic earthquakes (TT). (lechaudrondevulcain.com)
These earthquakes were located inside the volcanic edifice between 0.2 and 1.2 below sea level. (lechaudrondevulcain.com)

Simultaneously the ice cover on the 10 km diameter Grimsvötn caldera some 15 km to the south of the active subglacial fissure started to rise indicating that melt water from the eruption was flowing into the caldera depression and lifting its ice cover. (mtu.edu)
Volcanic fissure systems of the Mid- Atlantic Ridge plate boundary are partly covered by the western part of the ice sheet. (mtu.edu)
The last eruption within the Bardarbunga centre occurred in 1910, but eruptions on the fissure system have occurred in 871 AD, 1477 AD and 1862 AD, all producing substantial amounts of lava. (mtu.edu)
The present eruption fissure is located between these two volcanic centres with a direction parallel to the regional tectonic lineament. (mtu.edu)
The subglacial topography directs meltwater from the erupting fissure toward the Grimsvötn caldera which is rapidly filling. (mtu.edu)

Here we use Bayesian statistical analysis and inverse thermal history modelling of feldspar argon-argon and zircon uranium-thorium/helium ages to investigate resurgence after the 74-thousand-year-old Youngest Toba Tuff eruption. (nature.com)
Our modelling suggests cold storage of feldspar antecrysts prior to eruption for a maximum duration of around 5 and 13 thousand years at between 280 °C and 500 °C. We propose that the solidified carapace of remnant magma after the Youngest Toba Tuff eruption erupted in a subsolidus state, without being thermally remobilized or rejuvenated. (nature.com)

Visitors to the national park can bear witness to these previous eruptions as well as observe the ongoing one. (earthmagazine.org)

The Yellowstone Caldera last erupted around 640,000 years ago. (newstarget.com)

Experts at INGV have warned authorities and residents that tremors could intensify in the near future as seismic activity continues. (kfor.com)
The seismic activity has been intensifying for months. (kfor.com)
It said that the recent level of seismic activity in the region should not be misinterpreted as a warning or a prelude for a larger event. (newstarget.com)
It was a shallow earthquake, people felt it strongly especially in the Agnano area, closer to the epicentre", the director of the Vesuvius Observatory , Mauro Di Vito, told television station Canale 21 - "The seismic activity continues and will continue. (wantedinrome.com)
This has to do in part with the fact that Italian Civil Defence is privileged in having access to the data, and possibly also based on the assumption that being in a country with an exceptionally high level of volcanic and seismic hazard, free access to a lot of data can lead to misinterpretation in the public. (scienceblogs.com)
Already the possibility to view selected graphs of the seismic activity at Etna has led to a lot of misinterpretation, which everybody here is trying to avoid (although keeping data too "secret" can have a boomerang effect). (scienceblogs.com)

Mount Etna's first volcanic eruption occurred 500,000 years ago. (worldatlas.com)

Is Yellowstone overdue for an eruption? (usgs.gov)

But it was not always so, and that is the beginning of the story of how the geography and tectonic activity of this whenua (land) has led to flora and fauna so unique, it's one of the closest things on Earth to imagining life on another planet, or in a parallel universe. (futurelearn.com)

The most recent volcanic activity at Yellowstone consisted of rhyolitic lava flows that erupted approximately 70,000 years ago. (usgs.gov)

Be Cautious of Active Volcanic Mountains! (worldatlas.com)
To the south of Lake Taupo is the Tongaririo National Park - with three active volcanic mountains it's NZ's main area of volcanic activity! (kidzgo.co.nz)

Located in Sicily, Italy and known for its frequent volcanic eruptions, Mount Etna has an elevation of 3,329 meters above sea level. (worldatlas.com)
Mount Etna is characterized by a variety of eruption styles and summit calderas, such as the Ellitico Caldera. (worldatlas.com)
For instance, the phreatic eruption at Mount Etna in 1979 resulted in 140 deaths. (worldatlas.com)
There have been around 190 eruptions of Mount Etna in Sicily, Italy. (a-z-animals.com)
Would a large scale eruption (VEI 5 or greater) of Mt. Etna like the ones occurred in 122 BC and 1500 BC (disputed) be possible again in the foreseeable future? (scienceblogs.com)
I think it would be great to be able to do the same for future eruptions of Mt. Etna in Sicily, not to mention very instructive. (scienceblogs.com)

A caldera is a huge volcanic depression created when the ground collapses after a massive eruption. (kidzgo.co.nz)
In 1980, 1,300 feet of the summit came down the mountain as an avalanche as a result of a massive eruption . (a-z-animals.com)

Of these eruptions, at least 27 were rhyolite lava flows in the caldera, 13 were rhyolite lava flows outside the caldera, and 40 were basalt vents outside the caldera. (usgs.gov)

The 5-kilometer-long drive from the front gate to the observatory offers glimpses of the volcano's caldera, hidden behind a vegetated wall of red lehua-flowered `ohi`a trees. (earthmagazine.org)

The implication is that the Aniakchak I eruption was not accompanied by caldera collapse or, if a caldera formed, it either was too small to engulf the high-edifice source of the Birthday Creek glacier or it rapidly filled with ice that then spilled out Birthday Pass. (alaska.edu)
In that case, the glacier could have been beheaded by caldera collapse associated with the Aniakchak I eruption. (alaska.edu)
Lava is refilling the enormous depression that was created during the summit caldera collapse in 2018, as the 10-month volcanic eruption continues. (bigislandvideonews.com)
In 1912, huge volumes of magma erupted from beneath Mount Katmai, creating a 2-kilometer (1.2-mile) lava dome called Novarupta, and the collapse of the mountain, leaving a caldera with a depth of 600-meters (two thousand feet). (worldportsource.com)

Some of Earth's most active volcanic, hydrothermal (water + heat), and earthquake systems make this national park a priceless treasure. (nps.gov)
The USGS claims that, even if Yellowstone were to suddenly erupt, such an explosion would not be volcanic but hydrothermal . (newstarget.com)
A hydrothermal eruption will cause reservoirs of steam or hot water to explode. (newstarget.com)
A hydrothermal eruption would blast open these shallow craters and spew debris and hot water out by more than a kilometer. (newstarget.com)
Smaller hydrothermal eruptions have occurred in Yellowstone, with one of the most recent ones happening in 1989 at Porkchop Geyser in the Norris Geyser Basin. (newstarget.com)

Biscuit Basin was originally named for biscuit-like deposits around the Sapphire Pool, which were blown away by the pool's eruption in 1959. (vacationidea.com)

The science of forecasting a volcanic eruption has significantly advanced over the past 25 years. (usgs.gov)
Site of many petrified trees formed by a series of andesitic volcanic eruptions 45 to 50 million years ago. (nps.gov)
Up to 20,000 years ago it occupied most of the caldera. (teara.govt.nz)
Newberry was created by many volcanic eruptions beginning 80,000 years ago and continuing up to a mere 2,000 years ago. (traveloregon.com)
A smaller volcanic activity occurred many years later in 1727. (worldatlas.com)
While Stromboli has been continuously erupting for thousands of years, the last major eruption took place in 1921. (a-z-animals.com)
Our study indicates that resurgent uplift and volcanism initiated approximately 5 thousand years after the climactic caldera forming supereruption. (nature.com)
Last Wednesday the area registered a 4.2-magnitude earthquake , the strongest in 40 years, raising fears of a volcanic eruption among the roughly half a million residents in the so-called 'red zone' most at risk. (wantedinrome.com)
if anything it is now in one of its most vigorous and intense moments during recorded history, and indeed some of us are well aware that eruptions like in 122 B.C. or - if we don't want to cite the disputed 1500 B.C. event - about 4000 years ago (Coltelli et al. (scienceblogs.com)
The eruption formed what is known as the Valley of Ten Thousand Smokes because it created many fumaroles that released ash and gas for some 15 years after the eruption. (worldportsource.com)
There has not been volcanic activity in this area for 15.6 million years. (livescience.com)
During the last couple of hundred years, the Kilauea landscape has changed dramatically due to the near-constant level of volcanic activity. (earthmagazine.org)

One day earlier, the Operational Land Imager (OLI) on Landsat 8 got a closer view (about 25 meters per pixel) of Raung's summit caldera amidst some afternoon cloud cover and a plume streaming east and southeast. (nasa.gov)

The World Health Organization estimates that during 1998−2017, volcanic activities and the wildfires they spawned affected 6.2 million people and caused nearly 2,400 deaths. (cdc.gov)

The overheated streams of lava and tephra ejected during the volcanic eruptions result in significant damage. (worldatlas.com)

With over 300 geysers (two-thirds of the world total) and over 10,000 geothermal features altogether, the Yellowstone Caldera remains the largest volcanic system in North America. (landscapephotographymagazine.com)

The statement said YVO has not detected any activity that would suggest that the supervolcano is about to erupt. (newstarget.com)

Learn more: Yellowstone Eruption History The evolution of the Yellowstone Plateau Volcani Field: Past, present, and future! (usgs.gov)

Scientists have been trying to figure out exactly what the future entails for the Yellowstone caldera. (scitechdaily.com)
While analyzing samples of submarine volcanic glass near subduction zones, scientists found something unexpected. (scitechdaily.com)
After five months without any activity, scientists declared the eruption over. (a-z-animals.com)
(BIVN) - A dramatic uplift of the Kilauea caldera floor has been captured by scientists in a new timelapse video. (bigislandvideonews.com)
Yellowstone is monitored for signs of volcanic activity by YVO scientists," explained the USGS in a statement. (newstarget.com)

In the flooded "caldera" of Santorini there is still volcanic activity, as you can see during your visit to the Kammeni Islands. (hiddentrails.com)
Diving in Santorini is an experience not to be missed as there is a whole underwater world to discover, due to the island's volcanic activity, a unique phenomenon in the Mediterranean Sea. (artmaisons.gr)
Drop anchor on a luxury catamaran tour around the Santorini caldera while enjoying a delicious traditional meal with refreshing drinks from the open bar. (vueling.com)
Enjoy scuba diving in Santorini and dive into the biggest volcanic caldera in the world with your instructor. (vueling.com)
Next, when you feel comfortable, dive into the volcanic reef inside the caldera of Santorini. (vueling.com)

The strong volcanic eruptions have created a magnificent underwater scenery, giving scuba diving lovers endless options for wall dives and never ending drop-offs around the Caldera and the Volcanic islets. (artmaisons.gr)
The Cressi hybrid wetsuit is inspired by the underwater caldera karua, located in the vanuatu archipelago in the south pacific ocean. (varuste.net)
This kind of manifestation is frequent on active or not active underwater volcanic sites. (lechaudrondevulcain.com)
The analyzes underway by the OVSM-IPGP will make it possible to determine the possible relationship of this underwater degassing with the activity of Mount Pelée recorded by the OVSM since 2019. (lechaudrondevulcain.com)

Rhythmic explosions resulted in black ash clouds rising to a height of 500 meters while the buoyant eruption column rose to 3000 meters before being deflected by a southerly wind at a velocity of 30-40 knots. (mtu.edu)

The caldera floor collapses and/or subsides-often due to an eruption on the rift zone-and subsequent summit eruptions fill the depression with new lava. (bigislandvideonews.com)

No unusual seismicity or surface activity was associated with the deflation. (si.edu)

Take a day trip to the volcanic islets of Nea and Palea Kameni located in the centre of Caldera. (artmaisons.gr)
Next, head to Palea Kameni, and swim in the volcanic hot springs. (vueling.com)

In this painting, clouds of smoke and steam flecked with lava billow and whirl skyward from the glowing red fissures and caldera of Mount Vesuvius, obscuring much of the sky and water in the left half of the painting. (cdc.gov)

Beerenberg, Europe's second highest volcanic mountain, is a stratovolcano located on the Norwegian island of Jan Mayen. (worldatlas.com)

A significant volcanic edifice was created by the eruptions, and it gradually developed to reach its current height of 3,726 meters (12,224 feet). (selamatpagibali.com)

This is a sortable list of large eruptions that occurred between 11.7 Ka and 450+ Ma. (wikipedia.org)
We had to land outside of the caldera bay on the tops of large swale waves. (expeditions.com)
These ranged from large to small, some spanning much of the caldera floor, with others limited to just the Halemaʻumaʻu area. (bigislandvideonews.com)
Two major volcanic centers lie beneath the ice, the Bardarbunga volcanic centre and the Grimsvötn volcanic centre both with large subglacial caldera depressions. (mtu.edu)
As the volcanological community grapples with hazard assessment and monitoring of current activity with a view to forecasting future activity and mitigating hazards, a better understanding of the resurgent and restless history of large calderas is, therefore, an imperative. (nature.com)
The size of these materials vary and range from large volcanic bombs to small dust-sized particles called volcanic ash. (nzdl.org)
The islands were formed by a volcanic "hot spot," where a large mantle plume brings magma up through the center of the Pacific Plate. (earthmagazine.org)

2016) reports a magnitude of 6.0, bulk eruptive volume of 30 cubic km and a dense rock equivalent eruptive volume of 12 cubic km for the Aniakchak I caldera-forming eruption. (alaska.edu)
If you enjoy all kinds of water sports activities, Palau is the place to visit in 2016. (explore.com)

Stromboli has recorded one of the longest periods of volcanic activity in the world. (worldatlas.com)
Undated image of Stromboli in eruption. (scienceblogs.com)

Birch, W. D. (2012-12-15), "Assembly of a zoned volcanic magma chamber from multiple magma batches: The Cerberean Cauldron, Marysville Igneous Complex, Australia", Lithos, 155: 272-288, Bibcode:2012Litho.155. (wikipedia.org)

Eruptions readers were quick on the news about the new eruption at Sinabung in Indonesia. (scienceblogs.com)
This year we haven't had a lot of news about volcanic activity in Indonesia. (scienceblogs.com)

Often called supervolcanoes, these calderas and their associated magmatic foundations provide valuable insight into outstanding questions about the nature of crustal magmatic systems, the construction of upper crustal batholiths, and the evolution of the continental crust. (nature.com)
Does crustal heterogeneity control the distribution of volcanic systems? (royalholloway.ac.uk)

We are at the beginning of the cycle which means that solar eruptions are less frequent. (explore.com)
The activity continued at similar level until shortly before midnight on September 30th when volcanic tremor was recorded and earthquake shocks became less frequent. (mtu.edu)

Hundreds of small tremors have hit a densely-populated volcanic area west of the Italian city of Naples in recent weeks, raising the spectre of mass evacuations, even though experts don't see an imminent risk of eruption. (kfor.com)

Systematic search for Aniakchak I using geochemical fingerprinting has not been done, so the true maximum extent of pyroclastic flows from that eruption remains to be determined. (alaska.edu)
These are considered to have been emplaced by pyroclastic flows during one or a few closely spaced eruptions that constitute the Aniakchak I event. (alaska.edu)
Lava flows and pyroclastic flows are the main volcanic hazards. (nzdl.org)

The summit stands 3,332 meters (10,932 feet) above sea level and is capped by steep caldera that is 3 kilometers (2 miles) in diameter. (nasa.gov)

Diseases1

Phenomena and Processes3

Information Science1

Health Care1

Geographicals2

Volcano47

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Yellowstone Nati3

Series of volcanic eruptions2

Crater13

Geothermal activity3

Largest volcanic eruptions2

Recent volcanic eruption2

Documented Supervolcanic eruption1

631,000 years ago1

Explosive9

Biggest volcanic eruption2

Catastrophic3

Campi Flegrei2

Supervolcanic1

Known volcanic1

Geological Survey1

Earthquakes14

Fissure5

Youngest Toba Tuff2

Previous eruptions1

640,000 years ago1

Seismic6

500,000 years1

Overdue for an eruption1

Tectonic1

70,000 years1

Active Volcanic Mountains2

Etna6

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Collapse4

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Years12

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20171

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10,0001

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Plateau1

Scientists5

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Underwater4

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Steam1

Europe's1

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Large7

20162

Stromboli2

Magma chamber1

Indonesia2

Crustal2

Frequent2

Evacuations1

Pyroclastic flows3

Meters1