Review of Short Phrases and Links|
This Review contains major "Eruptions"- related terms, short phrases and links grouped together in the form of Encyclopedia article.
- Eruptions is an *antidote* to sensationalism and scaremongering.
- Eruptions are common and even last year there was a warning given about the postential disaster of an eruption in which lava reached Goma.
- Eruptions are less frequent but more explosive, also the caldera may be covered.
- Eruptions are continuing at Krakatau volcano in Indonesia from a crater on the SW side of the cone.
- Eruptions are explosive (pyroclastic) if the magma is gas-rich and felsic, slow if the magma is gas-poor and mafic.
- These eruptions are quiet because of low viscosity of mafic lava, so that it is very fluid and contains small amount of trapped gases.
- Typically they are effusive eruptions, with basaltic magmas of low viscosity, low content of gases, and high temperature at the vent.
- Low viscosity leads to gentler, less explosive eruptions.
- Together with the tephra and entrained air, volcanic gases can rise tens of kilometers into Earth's atmosphere during large explosive eruptions.
- Such enormous expansion of volcanic gases, primarily water, is the main driving force of explosive eruptions.
- The eruptions temporarily drained the lava lake in the summit crater while volcanic gases suffocated the heather forests on the upper slopes.
- When eruptions occur, the lava lake typically drains, sending magma pouring through a network of fissures, some of which run underneath Goma.
- During other Hawaiian eruptions, fluid basaltic lava may pond in vents, craters, or broad depressions to produce lava lakes.
- All of the known historic eruptions in the contiguous United States have been from Cascade volcanoes.
- The highest volcano with historic eruptions is Llullaillaco, Chile, at 6,739 m.
- Although no historic eruptions have been reported from Bazman, it does contain fumaroles.
- There have been no historic eruptions at Toba, but large earthquakes have occurred, the most recent in 1987 along the southern shore of the lake.
- It showed that up to four times as many volcanic eruptions occurred during the year following very large earthquakes than did so in other years.
- Explosive eruptions can also produce large earthquakes.
- When magma is very hot and flowing, gases can escape and eruptions are gentle with considerable amounts of magma reaching the surface to form lava flows.
- When thick magma and large amounts of gas build up under the surface, eruptions can be explosive, expelling lava, rocks and ash into the air.
- Hawaiian eruptions are typically gentle because their lava is highly fluid and thus tends to flow freely both beneath the surface and upon eruption.
- Today: In the first few hundred years after the cataclysmic eruption, renewed eruptions built Wizard Island, Merriam Cone, and the central platform.
- The latest eruptions produced a small rhyodacitic lava dome beneath the lake surface east of Wizard Island about 4200 years ago.
- Such eruptions will most likely produce deposits of lithic ash, lava flows, domes, and pyroclastic flows.
- Eruptions 500,000, 300,000, and 100,000 years ago along the periphery of the resurgent dome produced thick, steep-sided rhyolitic lava flows and domes.
- The flank eruptions typically produced cinder cones, small monogenetic lava cones, or domes, the latter commonly accompanied by pyroclastic flows.
- Dacite was the igneous rock making up the tephra in these eruptions and in the following climactic event.
- The eruptions of the last ~70,000 years were highly explosive; the eruptive magma were silica-rich (dacite and rhyodacite).
- Phreatic (steam explosion) eruptions, dacite and andesite lava flows and cinder cone formation have persisted into modern times.
- Fire and Mud; eruptions and lahars of Mount Pinatubo, University of Washington press, pp 457-511.
- The Ring of Fire is a zone of frequent earthquakes and volcanic eruptions that encircles the basin of the Pacific Ocean.
- The Pacific Ring of Fire is an area of frequent earthquakes and volcanic eruptions encircling the basin of the Pacific Ocean.
- Typically, these eruptions began in the summit caldera, Moku'aweoweo, with a curtain of fire (which is a 1 to 2 km line of lava fountains).
- Eruptions changed to explosive activity on 21st March with eight lava fountains.
- This slide set depicts explosive eruptions, lava fountains and flows, stream eruptions, and fissure eruptions from 19 volcanoes in 13 countries.
- At one extreme, basaltic eruptions are typically not explosive, because of the low viscosity and low volatile contents.
- Basaltic lava is thought to be the most common composition based on observed features typical of basaltic eruptions found on Earth.
- From 17 to 14 million years ago major basaltic eruptions covered much of the province with basalt flows to form the Columbia River Group.
- At Newberry, basaltic eruptions have occurred repeatedly on the volcano's flanks and in the caldera.
- Much of the volcanic activity on Venus occurs as basaltic eruptions that flood large areas.
- Any volcano is capable of erupting in several ways, but certain types of eruptions tend to be associated with particular volcanoes.
- Since 1965, the volcano has been erupting almost continuously, with pauses of a few months between eruptions.
- The world's most southerly active volcano, Mount Erebus has been erupting since 1972 though the eruptions have varied greatly in intensity.
- Mine talks about the recent eruptions at Pacaya and Tungurahua, with a little bit of exposition on the inevitable question of whether they're linked.
- Pacaya is the most active of Guatemala's 32 volcanoes, with three lava flows formed in eruptions between 1989 and 1991.
- President Colom said the eruptions of Pacaya since Wednesday had killed two people, injured 59, left three children missing and destroyed 100 homes.
- In the past, Pavlof has maintained low-level eruptions for several months, broken up by a few large-scale, explosive eruptions.
- Pavlof 3349 Reeder, J. W., 1990, Pavlof: in Annual report of the world volcanic eruptions in 1987, Bulletin of Volcanic Eruptions, v.
- Within months after the main eruption, small eruptions produced thick lava that formed a lava dome in the crater.
- Smaller eruptions about 5,000 years ago formed Wizard Island and a lava dome on the lake floor.
- A hot, fast-moving and high-density mixture of fine and coarse particles and gas formed during explosive eruptions or from the collapse of a lava dome.
- These mound-shaped accumulations of volcanic rock, called lava domes, were created by eruptions of lava too viscous to readily flow away from its source.
- The program also surveys the various types of eruptions, craters, cones and vents, lava domes, magma, and volcanic rock.
- Recent eruptions of lava domes at Unzen volcano in Japan and at Soufriere Hills in Montserrat have forced thousands of people from their homes.
- Only a few volcanoes on earth are formed like this, but their eruptions are the most violent and dangerous ones.
- The glow of eruptions was thought to be from Vulcan's forges as we worked beneath the earth.
- Rocks that crystallize above the earth during violent volcanic eruptions are pyroclastic rocks.
- Since 1955, most eruptions of Kilauea Volcano have been on the east flank (rift zone) of the volcano.
- Explosive eruptions from the central crater are often accompanied by lava flows that issue from near the base of the cinder cone.
- Subsequent eruptions have built a cinder cone on the floor of the caldera, which now forms an island called Wizard Island.
- A shield volcano, unlike the cinder cone, is created from and gets bigger because of lava flows during non-explosive eruptions.
- Beyond the basin where surface or shallow groundwater was not available, eruptions produced cinder cones and lava flows.
- Later eruptions created cinder cones such as Wizard Island (c.
- Subsequent eruptions formed domes, cinder cones, and explosion pits on the caldera floor.
- Strombolian eruptions are named because of activity of Stromboli in Sicily.
- Strombolian eruptions, named after a volcano in Sicily, look like a giant sputtering blowtorch.
- Some of the Strombolian eruptions caused glass to vibrate in buildings located 4 km N. A lava flow that began in mid-January remained active on the S flank.
- Vulcanian Eruptions: Like Strombolian eruptions, these eruptions are characterized by many short explosions.
- Strombolian eruptions are somewhat more explosive eruptions of lava, with greater viscosity, and produce a larger proportion of pyroclastic material.
- The volcano usually generates strombolian eruptions, with ejection of incandescent pyroclasts and lava flows.
- Holocene eruptions have constructed pumice cones, lava domes, and short, blocky lava flows.
- Most Holocene eruptions have produced basaltic-to-rhyolitic lava flows from the fissure zone transecting the island.
- Holocene eruptions have consisted of phreatic or phreatomagmatic explosions from several summit craters.
- However, no Holocene eruptions are known, and volcanic activity in the belt has likely ceased.
- Holocene eruptions also occurred at Black Butte, a group of overlapping dacite domes about 13 kilometers (8 miles) west of Mount Shasta.
- The frequent historical eruptions of Avachinsky have been similar in style and magnitude to previous Holocene eruptions.
- Debris avalanches, debris flows, and floods commonly accompany eruptions, but can also occur during dormant periods.
- Debris avalanches, lahars, and floods commonly accompany eruptions, but can also occur during dormant periods.
- Its eruptions always come along with a large amount of landslides and flooding.
- Landslides on volcano slopes are triggered when eruptions, heavy rainfall, or large earthquakes cause these materials to break free and move downhill.
- Topics include earthquakes, landslides, volcanic eruptions, coastal erosion, floods, atmospheric and water pollution.
- Frequent historical eruptions have been recorded at Manam since 1616.
- Manam is a very active volcano and there were numerous reports of minor eruptions in the period before and after the main explosive eruption.
- Rainier is considered a stratovolcano, composed of many layers of hardened lava, ash and debris from explosive eruptions.
- Successive eruptions build a cone of hardened lava.
- There have been no eruptions of Toba in historical times.
- It is Kilauea's primary vent and site of many spectacular eruptions in historical times.
- The Western Rift Valley of Africa has experienced severe earthquakes and volcanic eruptions in recent historical times.
- Eruptions, relatively infrequent in historical time, have included explosive activity and lahars, primarily from the summit crater.
- The area has been rattled by several major earthquakes in the last century, but there have been no eruptions at Toba in historical time.
- Although no historical eruptions have been recorded, the youthful morphology of deposits suggest that Lastarria has been active during historical time.
- During that period, eruptions of basalt, andesite, dacite, and rhyolite occurred in the Mount Mazama area.
- Future eruptions from Adams will probably follow patterns set by previous events and will thus be flank lava flows of andesite or basalt.
- Instead, Strombolian eruptions are dominated by scoria fragments, which are highly vesiculated clasts of basalt with a cindery appearance.
- Mauna Loa typifies a shield volcano, which is a huge, gently sloping landform built up of many eruptions of fluid lava.
- Pyroclastic eruptions tend to produce a great deal of solid volcanic fragments rather than fluid lava.
- About 13,000 years ago, Glacier Peak generated an unusually strong sequence of eruptions deposited volcanic ash as far away as Wyoming.
- Most of the eruptions from Glacier Peak have been tephra eruptions.
- Past eruptions have severely affected river valleys that head on Glacier Peak.
- American Indian lore contains numerous legends to explain the eruptions of Mount St. Helens and other Cascade volcanoes.
- Some Cascade volcanoes, including Mount St. Helens, have had nonexplosive eruptions of andesite and basalt, as well as explosive eruptions, in the past.
- Eruptions of Cascade volcanoes tend to be much more explosive than those of, for example, the well-known Hawaiian volcanoes.
- The collapse may occur as the result of a single cataclysmic eruption, or it may occur in stages as the result of a series of eruptions.
- Three people died as a result of lightning strikes caused by the eruptions, but no deaths were attributed to the lava or asphyxiation.
- This classic, conical stratovolcano shape is the result of eruptions of viscous lava flows from a central vent at the summit of the volcano.
- Six of 24 known eruptions at Taal since 1572 have caused fatalities, many from tsunamis in the crater lake.
- Nyiragongo’s summit is only 18 km north of Goma and has been the source of eruptions of unusually fluid lava that caused hundreds of fatalities.
- Only eruptions with scale 3 or above on VEI are given with known sources and fatalities, except if smaller scale eruptions resulted some fatalities.
- Lahars produced by phreatic eruptions from the summit crater lake are a hazard to a ski area on the upper flanks and to river valleys below the volcano.
- Four major phreatic eruptions have occurred during the past 5,000 years, two of them in historical time, in 806 and 1888.
- Phreatic eruptions (or steam-blast eruptions) are a type of eruption driven by the expansion of steam.
- Most of the eruptions produce lava flows from fissures in the flanks of the volcano.
- Eruptions during the last 10,000 yr produced lava flows and domes on and around the flanks of Mount Shasta.
- Some of the tephra from these eruptions fell back onto the volcano and avalanched down its flanks.
- All of these eruptions were on flank vents and produced lava flows and scoria cones.
- The eruptions were gentle rather than explosive like Mount St. Helens, coating the volcano's sides with flow after flow of basaltic lava.
- Eight eruptions produced about 5.3 cubic kilometers of basaltic lava during a time interval of a few hundred years about 10,500 years ago.
- These eruptions left deposits of basaltic lava and volcanic breccia (angular, broken rock fragments held together in a matrix of finer grained material).
- Most eruptions at Hawaiian volcanoes are not explosive and are characterized by the relatively quiet outflow of very fluid lava.
- Explosive eruptions occur much less often than non-explosive eruptions at Hawaiian volcanoes but have been witnessed in historic time.
- Hawaiian eruptions are a type of volcanic eruption, named after the Hawaiian volcanoes with which this eruptive type is hallmark.
- When asked about Hawaiian volcanoes, most people imagine the Island of Hawai`i and its eruptions at Kilauea or Mauna Loa volcanoes.
- These eruptions began on January 3 with a six-kilometer-long curtain of fire on the east rift system of Kilauea.
- Hawaiian eruptions are often extremely long lived; Pu'u O'o, a cinder cone of Kilauea, has been erupting continuously since 1983.
- Most of the eruptions were from fissures or shield volcanoes and involve the effusion of basaltic lava.
- The eruptions of shield volcanoes are characterized by low-explosivity lava-fountaining that forms cinder cones and spatter cones at the vent.
- Eruptions of shield volcanoes are not as violent as composite cone volcanoes.
- Earth > Geology > Volcanoes > Volcano
* Active Volcanoes
* Effusive Eruptions
* Explosive Eruption
* Explosive Eruptions
* Fissure Eruptions
* Frequent Eruptions
* Future Eruptions
* Historical Eruptions
* Lava Eruptions
* Rift Zones
* Violent Eruptions
* Volcanic Eruptions
* Volcano Eruptions
* Yellowstone Caldera
Books about "Eruptions" in