• The 1975 M7.2 Kalapana earthquake, which occurred on a fault patch under the entire Kilauea Summit and East Rift Zone area, was followed within hours by a short eruption at the summit of Kilauea. (hawaii247.com)
  • Seismologists are often asked the question, "Can large earthquakes trigger volcanic eruptions? (hawaii247.com)
  • When looking at whether eruptions are triggered by earthquakes, it seems clear that both large local earthquakes and large distant earthquakes can bring a volcano closer to eruption. (hawaii247.com)
  • The preclimactic eruptive activity at Mount Pinatubo in late May and early June of 1991 consisted of dome growth, followed by 4 vertical eruptions, followed by 13 surge-producing eruptions. (usgs.gov)
  • One route to better eruption-pattern forecasts may be through a better understanding of the fundamental processes that control eruptive behavior. (usgs.gov)
  • Subglacial and phreatic eruptions are defined by their eruptive mechanism, and vary in strength. (wikipedia.org)
  • The volume of ejected material from Hawaiian eruptions is less than half of that found in other eruptive types. (wikipedia.org)
  • The occurrence of shallow magma pockets likely plays a major role in controlling eruptive styles during eruptions and should therefore be routinely considered in hazard mitigation efforts. (eurekalert.org)
  • The Pinatubo sequence, to be described in detail below, consisted sequentially of increasing ash emissions, dome growth, 4 vertical eruptions with continued dome growth, 13 pyroclastic surges, and a climactic vertical eruption with associated pyroclastic flows. (usgs.gov)
  • In this case, the eruption column is too dense to be lifted high into the air by air convection, and instead falls down the flanks of the volcano to form a pyroclastic flow or surge . (wikipedia.org)
  • About 6,300 years ago, pyroclastic flows from that eruption reached the coast of southern Kyūshū up to 100 km (62 mi) away, and ash fell as far as Hokkaidō. (wikipedia.org)
  • The Philippines' most active volcano continued to spew fountains of red-hot lava and massive ash plumes Tuesday in a dazzling but increasingly dangerous eruption that has sent 40,000 villagers to shelter in evacuation centers. (japantimes.co.jp)
  • Hawaii authorities scrambled to move tens of thousands of gallons of highly flammable chemicals from the path of lava on Thursday, and the state's governor warned mass evacuations might be needed as the Kilauea volcano's eruption became more violent. (japantimes.co.jp)
  • New infrasound recordings of Cotopaxi volcano in central Ecuador show that after a sequence of eruptions in 2015, the volcano's crater changed shape. (eurekalert.org)
  • Understanding each volcano's unique "voiceprint" can help scientists better monitor these natural hazards and alert scientists to changes going on inside the volcano that could signal an impending eruption, according to the study authors. (eurekalert.org)
  • That pyroclasts from most preclimactic deposits display a wide density range suggests that the early vanguard magmas were subject to substantial degassing before eruption. (usgs.gov)
  • This process also stops at the eruption, so the shallower the slope of titanium concentrations across these boundaries today, the longer the crystal spent in magmatic conditions. (innovations-report.com)
  • For many people with polymorphic skin eruption, the rash appears every spring and remains a problem throughout summer, before settling down by autumn. (www.nhs.uk)
  • As such, an "active volcano" can be best described as one that's currently in a state of regular eruptions. (universetoday.com)
  • Stratigraphic evidence indicates that eruption magnitude declined successively through the vertical eruptions and generally declined successively through the surge-producing eruptions. (usgs.gov)
  • This decline in magnitude was accompanied by a general decline in the repose-interval duration, so the successive eruptions were generally smaller and more closely spaced in time. (usgs.gov)
  • Etna showing signs of new eruptions? (scienceblogs.com)
  • Eruptions reader and member at Italian National Institute of Geophysics and Volcanology in Catania, Dr. Boris Behncke, has been keeping many of us appraised on the goings-on at Mt. Etna. (scienceblogs.com)
  • Hawaiian eruptions often begin as a line of vent eruptions along a fissure vent, a so-called "curtain of fire. (wikipedia.org)
  • According to NOAA's Earth Systems Research Laboratory (ESRL), Benjamin Franklin was the first person to suggest that major volcanic eruptions could emit enough ash and other particles into the atmosphere and that it could have a significant impact on short-term climate, even great distances from where the eruption occurred. (noaa.gov)
  • Volcanic eruptions can inject great amounts of gases and solid particles (ash) into the upper atmosphere. (mpg.de)
  • The third major eruption began as a vertical eruption and culminated with a minor surge event. (usgs.gov)
  • The 2015 eruptions were relatively minor but triggered an explosion that caused the crater floor to drop out of sight. (eurekalert.org)
  • The rising air carries the solid and liquid material from the eruption entrained in it upwards. (wikipedia.org)
  • Maya Tolstoy , a marine geophysicist at Columbia University's Lamont-Doherty Earth Observatory, examined seismic records of ten seafloor eruptions. (nationalgeographic.com)
  • A massive eruption could melt Cotopaxi's immense snowcap, which would trigger massive floods and mudflows that could reach nearby cities and towns. (eurekalert.org)
  • the strongest eruptions are called "Ultra-Plinian. (wikipedia.org)
  • Because mitigation measures depend on anticipation of eruption types, timing, and the areas likely to be affected, accurate forecasts can minimize the social, political, and economic disruption caused by eruptions. (usgs.gov)
  • The El Chichón sequence consisted of an initial major vertical eruption followed 5 days later by two more major eruptions. (usgs.gov)
  • Eruption column heights are a useful way of measuring eruption intensity since for a given atmospheric temperature, the column height is proportional to the fourth root of the mass eruption rate. (wikipedia.org)
  • Hawaiian eruptions are the calmest types of volcanic events, characterized by the effusive eruption of very fluid basalt-type lavas with low gaseous content. (wikipedia.org)
  • Kaposi varicelliform eruption (KVE) is the name given to a distinct cutaneous eruption caused by herpes simplex virus (HSV) type 1, HSV-2, coxsackievirus A16, or vaccinia virus that infects a preexisting dermatosis. (medscape.com)
  • Eruptions of the intense magnetic flux leads to solar storms, but until now no one was able to predict them. (ibtimes.com)