Chronology and products of the 2000 eruption of Miyakejima Volcano, Japan

Issue Title: The 2000 eruption of Miyakeijma volcano, Japan Lateral migration of magma away from Miyakejima volcanic island, Japan, generated summit subsidence, associated with summit explosions in the summer of 2000. An earthquake swarm beneath Miyakejima began on the evening of 26 June 2000, follo...

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Veröffentlicht in:Bulletin of volcanology 2005-03, Vol.67 (3), p.205-218
Hauptverfasser: NAKADA, S, NAGAI, M, KANEKO, T, NOZAWA, A, SUZUKI-KAMATA, K
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container_start_page 205
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creator NAKADA, S
NAGAI, M
KANEKO, T
NOZAWA, A
SUZUKI-KAMATA, K
description Issue Title: The 2000 eruption of Miyakeijma volcano, Japan Lateral migration of magma away from Miyakejima volcanic island, Japan, generated summit subsidence, associated with summit explosions in the summer of 2000. An earthquake swarm beneath Miyakejima began on the evening of 26 June 2000, followed by a submarine eruption the next morning. Strong seismic activity continued under the sea from beneath the coast of Miyakejima to a few tens of kilometers northwest of the island. Summit eruptive event began with subsidence of the summit on 8 July and both explosions and subsidence continued intermittently through July and August. The most intense eruptive event occurred on 18 August and was vulcanian to subplinian in type. Ash lofted into the stratosphere fell over the entire island, and abundant volcanic bombs were erupted at this time. Another large explosion took place on 29 August. This generated a low-temperature pyroclastic surge, which covered a residential area on the northern coast of the island. The total volume of tephra erupted was 9.3×10^sup 6^ m^sup 3^ (DRE), much smaller than the volume of the resulting caldera (6×10^sup 8^ m^sup 3^). Migration of magma away from Miyakejima was associated with crustal extension northwest of Miyakejima and coincident shrinkage of Miyakejima Island itself during July-August 2000. This magma migration probably caused stoping of roof rock into the magma reservoir, generating subsurface cavities filled with hydrothermal fluid and/or magmatic foam and formation of a caldera (Oyama Caldera) at the summit. Interaction of hydrothermal fluid with ascending magma drove a series of phreatic to phreatomagmatic eruptions. It is likely that new magma was supplied to the reservoir from the bottom during waning stage of magma's migration, resulting in explosive discharge on 18 August. The 18 August event and phreatic explosions on 29 August produced a conduit system that allowed abundant SO^sub 2^ emission (as high as 460 kg s^sup -1^) after the major eruptive events were over. At the time of writing, inhabitants of the island (about 3,000) have been evacuated from Miyakejima for more than 3 years.[PUBLICATION ABSTRACT]
doi_str_mv 10.1007/s00445-004-0404-4
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An earthquake swarm beneath Miyakejima began on the evening of 26 June 2000, followed by a submarine eruption the next morning. Strong seismic activity continued under the sea from beneath the coast of Miyakejima to a few tens of kilometers northwest of the island. Summit eruptive event began with subsidence of the summit on 8 July and both explosions and subsidence continued intermittently through July and August. The most intense eruptive event occurred on 18 August and was vulcanian to subplinian in type. Ash lofted into the stratosphere fell over the entire island, and abundant volcanic bombs were erupted at this time. Another large explosion took place on 29 August. This generated a low-temperature pyroclastic surge, which covered a residential area on the northern coast of the island. The total volume of tephra erupted was 9.3×10^sup 6^ m^sup 3^ (DRE), much smaller than the volume of the resulting caldera (6×10^sup 8^ m^sup 3^). Migration of magma away from Miyakejima was associated with crustal extension northwest of Miyakejima and coincident shrinkage of Miyakejima Island itself during July-August 2000. This magma migration probably caused stoping of roof rock into the magma reservoir, generating subsurface cavities filled with hydrothermal fluid and/or magmatic foam and formation of a caldera (Oyama Caldera) at the summit. Interaction of hydrothermal fluid with ascending magma drove a series of phreatic to phreatomagmatic eruptions. It is likely that new magma was supplied to the reservoir from the bottom during waning stage of magma's migration, resulting in explosive discharge on 18 August. The 18 August event and phreatic explosions on 29 August produced a conduit system that allowed abundant SO^sub 2^ emission (as high as 460 kg s^sup -1^) after the major eruptive events were over. 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Geothermics</topic><topic>Exact sciences and technology</topic><topic>Explosions</topic><topic>Geology</topic><topic>Igneous and metamorphic rocks petrology, volcanic processes, magmas</topic><topic>Low temperature</topic><topic>Magma</topic><topic>Natural hazards: prediction, damages, etc</topic><topic>Reservoirs</topic><topic>Residential areas</topic><topic>Seismic activity</topic><topic>Stratosphere</topic><topic>Subsidence</topic><topic>Volcanic eruptions</topic><topic>Volcanic islands</topic><topic>Volcanoes</topic><topic>Volcanology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>NAKADA, S</creatorcontrib><creatorcontrib>NAGAI, M</creatorcontrib><creatorcontrib>KANEKO, T</creatorcontrib><creatorcontrib>NOZAWA, A</creatorcontrib><creatorcontrib>SUZUKI-KAMATA, K</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Meteorological &amp; Geoastrophysical Abstracts</collection><collection>Oceanic Abstracts</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Science Database (Alumni Edition)</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest One Sustainability</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Natural Science Collection</collection><collection>Earth, Atmospheric &amp; Aquatic Science Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>ProQuest Central Student</collection><collection>Aquatic Science &amp; Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy &amp; Non-Living Resources</collection><collection>SciTech Premium Collection</collection><collection>Meteorological &amp; Geoastrophysical Abstracts - Academic</collection><collection>Aquatic Science &amp; Fisheries Abstracts (ASFA) Professional</collection><collection>Science Database</collection><collection>Earth, Atmospheric &amp; Aquatic Science Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central Basic</collection><jtitle>Bulletin of volcanology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>NAKADA, S</au><au>NAGAI, M</au><au>KANEKO, T</au><au>NOZAWA, A</au><au>SUZUKI-KAMATA, K</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Chronology and products of the 2000 eruption of Miyakejima Volcano, Japan</atitle><jtitle>Bulletin of volcanology</jtitle><date>2005-03-01</date><risdate>2005</risdate><volume>67</volume><issue>3</issue><spage>205</spage><epage>218</epage><pages>205-218</pages><issn>0258-8900</issn><eissn>1432-0819</eissn><coden>BUVOEW</coden><abstract>Issue Title: The 2000 eruption of Miyakeijma volcano, Japan Lateral migration of magma away from Miyakejima volcanic island, Japan, generated summit subsidence, associated with summit explosions in the summer of 2000. An earthquake swarm beneath Miyakejima began on the evening of 26 June 2000, followed by a submarine eruption the next morning. Strong seismic activity continued under the sea from beneath the coast of Miyakejima to a few tens of kilometers northwest of the island. Summit eruptive event began with subsidence of the summit on 8 July and both explosions and subsidence continued intermittently through July and August. The most intense eruptive event occurred on 18 August and was vulcanian to subplinian in type. Ash lofted into the stratosphere fell over the entire island, and abundant volcanic bombs were erupted at this time. Another large explosion took place on 29 August. This generated a low-temperature pyroclastic surge, which covered a residential area on the northern coast of the island. The total volume of tephra erupted was 9.3×10^sup 6^ m^sup 3^ (DRE), much smaller than the volume of the resulting caldera (6×10^sup 8^ m^sup 3^). Migration of magma away from Miyakejima was associated with crustal extension northwest of Miyakejima and coincident shrinkage of Miyakejima Island itself during July-August 2000. This magma migration probably caused stoping of roof rock into the magma reservoir, generating subsurface cavities filled with hydrothermal fluid and/or magmatic foam and formation of a caldera (Oyama Caldera) at the summit. Interaction of hydrothermal fluid with ascending magma drove a series of phreatic to phreatomagmatic eruptions. It is likely that new magma was supplied to the reservoir from the bottom during waning stage of magma's migration, resulting in explosive discharge on 18 August. The 18 August event and phreatic explosions on 29 August produced a conduit system that allowed abundant SO^sub 2^ emission (as high as 460 kg s^sup -1^) after the major eruptive events were over. At the time of writing, inhabitants of the island (about 3,000) have been evacuated from Miyakejima for more than 3 years.[PUBLICATION ABSTRACT]</abstract><cop>Heidelberg</cop><pub>Springer</pub><doi>10.1007/s00445-004-0404-4</doi><tpages>14</tpages></addata></record>
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subjects Calderas
Crystalline rocks
Earth sciences
Earth, ocean, space
Earthquakes
Engineering and environment geology. Geothermics
Exact sciences and technology
Explosions
Geology
Igneous and metamorphic rocks petrology, volcanic processes, magmas
Low temperature
Magma
Natural hazards: prediction, damages, etc
Reservoirs
Residential areas
Seismic activity
Stratosphere
Subsidence
Volcanic eruptions
Volcanic islands
Volcanoes
Volcanology
title Chronology and products of the 2000 eruption of Miyakejima Volcano, Japan
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