Publication Date:
1999-02-19
Description:
Dome growth at the Soufriere Hills volcano (1996 to 1998) was frequently accompanied by repetitive cycles of earthquakes, ground deformation, degassing, and explosive eruptions. The cycles reflected unsteady conduit flow of volatile-charged magma resulting from gas exsolution, rheological stiffening, and pressurization. The cycles, over hours to days, initiated when degassed stiff magma retarded flow in the upper conduit. Conduit pressure built with gas exsolution, causing shallow seismicity and edifice inflation. Magma and gas were then expelled and the edifice deflated. The repeat time-scale is controlled by magma ascent rates, degassing, and microlite crystallization kinetics. Cyclic behavior allows short-term forecasting of timing, and of eruption style related to explosivity potential.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Voight -- Sparks -- Miller -- Stewart -- Hoblitt -- Clarke -- Ewart -- Aspinall -- Baptie -- Calder -- Cole -- Druitt -- Hartford -- Herd -- Jackson -- Lejeune -- Lockhart -- Loughlin -- Luckett -- Lynch -- Norton -- Robertson -- Watson -- Watts -- Young -- New York, N.Y. -- Science. 1999 Feb 19;283(5405):1138-42.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Montserrat Volcano Observatory, Montserrat, British West Indies.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10024234" target="_blank"〉PubMed〈/a〉
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
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Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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