GSTDTAP  > 气候变化
DOI10.1002/2017GL076936
Continuous Gravity and Tilt Reveal Anomalous Pressure and Density Changes Associated With Gas Pistoning Within the Summit Lava Lake of Klauea Volcano, Hawai'i
Poland, Michael P.1; Carbone, Daniele2
2018-03-16
发表期刊GEOPHYSICAL RESEARCH LETTERS
ISSN0094-8276
EISSN1944-8007
出版年2018
卷号45期号:5页码:2319-2327
文章类型Article
语种英语
国家USA; Italy
英文摘要

Gas piston events within the summit eruptive vent of Klauea Volcano, Hawaii, are characterized by increases in lava level and by decreases in seismic energy release, spattering, and degassing. During 2010-2011, gas piston events were especially well manifested, with lava level rises of tens of meters over the course of several hours, followed by a sudden drop to preevent levels. The changes in lava level were accompanied by directly proportional changes in gravity, but ground deformation determined from tilt was anticorrelative. The small magnitude of the gravity changes, compared to the large changes in volume within the vent during gas pistons, suggests that pistoning involves the accumulation of a very low-density (100-200 kg/m(3)) foam at the top of the lava column. Co-event ground tilt indicates that rise in lava level is paradoxically associated with deflation (the opposite is usually true), which can be modeled as an increase in the gas content of the magma column between the source reservoir and the surface. Gas pistoning behavior is therefore associated with not only accumulation of a shallow magmatic foam but also more bubbles within the feeder conduit, probably due to the overall decrease in gas emissions from the lava lake during piston events.


英文关键词Kilauea lava lake deformation gravity change pressure geodesy
领域气候变化
收录类别SCI-E
WOS记录号WOS:000428402400023
WOS关键词KILAUEA VOLCANO ; EXPLOSIVE ERUPTIONS ; FLUCTUATIONS ; SEISMICITY ; CONVECTION ; ROCKFALLS ; INSIGHTS
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/29114
专题气候变化
作者单位1.US Geol Survey, Cascades Volcano Observ, Vancouver, WA 98683 USA;
2.Ist Nazl Geofis & Vulcanol, Sez Catania, Osservatorio Etneo, Catania, Italy
推荐引用方式
GB/T 7714
Poland, Michael P.,Carbone, Daniele. Continuous Gravity and Tilt Reveal Anomalous Pressure and Density Changes Associated With Gas Pistoning Within the Summit Lava Lake of Klauea Volcano, Hawai'i[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(5):2319-2327.
APA Poland, Michael P.,&Carbone, Daniele.(2018).Continuous Gravity and Tilt Reveal Anomalous Pressure and Density Changes Associated With Gas Pistoning Within the Summit Lava Lake of Klauea Volcano, Hawai'i.GEOPHYSICAL RESEARCH LETTERS,45(5),2319-2327.
MLA Poland, Michael P.,et al."Continuous Gravity and Tilt Reveal Anomalous Pressure and Density Changes Associated With Gas Pistoning Within the Summit Lava Lake of Klauea Volcano, Hawai'i".GEOPHYSICAL RESEARCH LETTERS 45.5(2018):2319-2327.
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