Broadband Seismic Studies of Dome Growth at Merapi Volcano, Indonesia
Broadband Seismic Studies of Dome Growth at Merapi Volcano, Indonesia
批准号:
0001199
负责人:
Barry Voight
金额:
$16.51万
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
2000
资助国家:
美国
项目状态:
已结题
起止时间:
2000-08-01 至 2003-07-31
中文摘要
EAR-0001199Voight, Barry 1998 年在默拉皮火山(印度尼西亚爪哇)山顶部署了为期一个月的宽带地震仪,产生了与活跃的安山质穹顶生长相关的火山地震的重要数据集。 这些地震传统上称为多相 (MP) 事件,通常以短周期台站上的 3-4 Hz 地面运动为特征。 然而,在圆顶数百米范围内收集的数据显示,MP 波形上叠加了相对高幅度、独特的、非常长周期(4 秒)的水平地面运动,在许多事件中,同一站点的波形几乎相同。 在更远距离的宽带站上观察不到极长周期脉冲。 水平地面运动的主导、脉冲幅度随距离的衰减、熔岩穹顶附近的台站的紧密距离以及现代宽带地震仪的特征都表明,这些变形脉冲是由于活跃生长的默拉皮穹顶的熔岩挤出过程引起的动态近场倾斜造成的。 拟议开展一个为期两年的项目,利用数值方法分析这些数据,计算合成位移和旋转场,并在两个项目中进行为期一个月的宽带地震仪 PASSCAL/RAMP 部署,并结合高数据速率倾斜测量,以便在默拉皮预期的持续活动期间收集更多数据。 这项研究的结果将对解释与火山过程相关的宽带信号产生重要影响,并可能导致对与活动火山穹顶生长相关的地震过程的全新理解。
英文摘要
EAR-0001199Voight, Barry A month-long deployment of broadband seismographs at the summit of Merapi volcano (Java, Indonesia) in 1998 has yield a remarkable data set of volcanic earthquakes associated with active andesitic dome growth. These earthquakes, traditionally termed multiphase (MP) events, are usually characterized by 3-4 Hz ground motions on short-period stations. However, data collected within a few hundred meters of the dome showed relatively high-amplitude, distinctive, very-long-period (4 sec) horizontal ground motions superposed on the MP waveforms, with nearly identical waveforms at the same stations over many events. Very-long-period pulses are not observed at broadband stations at greater distance. Dominance of horizontal ground motions, pulse amplitude decay with distance, the close proximity of stations near lava dome, and character of modern broadband seismographs all suggest that these deformational pulses are due to dynamic, near-field tilts caused by lava extrusion processes at the actively growing Merapi dome. A two year-project is proposed to analyze these data using numerical methods to compute synthetic displacement and rotation fields and two conduct a one-month long PASSCAL/RAMP deployment of broadband seismographs, in conjunction with high-data-rate tiltmetry, to collect more data during expected sustained actiity at Merapi. The results of this study will have important implications in interpreting broadband signals associated with volcanic processes, and may lead to fundamentally new understanding of seismic processes associated with active volcanic dome growth.
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RAPID: Pyroclastic Surge Dynamics in the 2010 Merapi Eruption
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批准号:1125069
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项目类别:Standard Grant
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资助金额:$4.95万
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财政年份:2011
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负责人:Barry Voight
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依托单位:
Collaborative Research: Facility Support for the CALIPSO Borehole Observatory, Soufriere Hills Volcano, Montserrat
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批准号:0732415
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项目类别:Continuing Grant
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资助金额:$7.77万
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财政年份:2007
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负责人:Barry Voight
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依托单位:
COLLABORATIVE RESEARCH: The CALIPSO Project: Imaging the Magma Chamber on Montserrat
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批准号:0607691
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项目类别:Continuing Grant
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资助金额:$58.52万
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财政年份:2006
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负责人:Barry Voight
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依托单位:
Collaborative Research: The CALIPSO Project: Imaging the Magma Chamber on Montserrat
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批准号:0507324
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项目类别:Standard Grant
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资助金额:$7.8万
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财政年份:2005
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负责人:Barry Voight
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依托单位:
Collaborative Research: SEA-CALIPSO: An Offshore/Onshore Tomography and Magma-Chamber Seismic Imaging Experiment on Montserrat
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批准号:0440284
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项目类别:Standard Grant
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资助金额:$0.0万
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财政年份:2005
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负责人:Barry Voight
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依托单位:
Validation of a Numerical Granular Flow Simulation Model for Pyroclastic Flows and Debris Avalanches
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批准号:0408709
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项目类别:Continuing Grant
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资助金额:$27.52万
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财政年份:2004
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负责人:Barry Voight
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依托单位:
COLLABORATIVE RESEARCH: Magma Reservoir-Conduit Dynamics Revealed by Borehole Geophysical Observatory and Continuous GPS
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批准号:0116826
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项目类别:Continuing Grant
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资助金额:$57.1万
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财政年份:2002
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负责人:Barry Voight
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依托单位:
Edifice Sector Failure at Soufriere Hills Volcano, Montserrat: Documenting the Failure Dynamics of a Hydrothermally-Altered Edifice in Three-Dimensions
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批准号:9909673
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项目类别:Continuing Grant
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资助金额:$19.03万
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财政年份:2000
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负责人:Barry Voight
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依托单位:
Multi-Phased Flow Modeling of Vulcanian Explosions with Fountain Collapse on Montserrat
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批准号:0073761
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项目类别:Continuing Grant
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资助金额:$15.02万
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财政年份:2000
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负责人:Barry Voight
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依托单位:
Dome Growth, Instability, and Pyroclastic Flow Generation at Decade Volcano Merapi, Indonesia
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批准号:9614622
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项目类别:Standard Grant
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资助金额:$16.5万
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财政年份:1997
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负责人:Barry Voight
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依托单位:
Directed Blast - Debris Avalanche Relations at Bezymianny Volcano, Kamchatka
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批准号:9628413
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项目类别:Standard Grant
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资助金额:$13.6万
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财政年份:1996
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负责人:Barry Voight
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依托单位:
U.S.-Indonesia Joint Workshop: The Hazard Management of Decade Volcano Merapi, in Yogyakarta, Indonesia in October, 1995
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批准号:9507665
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项目类别:Standard Grant
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资助金额:$3.99万
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财政年份:1995
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负责人:Barry Voight
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依托单位:
Sector Collapse-Generated Debris Avalanche-Cohesive Debris Flow Transformations at Decade Volcano Mount Rainier, Washington
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批准号:9316739
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项目类别:Standard Grant
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资助金额:$12.74万
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财政年份:1994
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负责人:Barry Voight
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依托单位:
Deformation and Real-Time Seismic Amplitude Monitoring at Merapi Volcanic, Java
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批准号:9117396
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项目类别:Standard Grant
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资助金额:$4.59万
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财政年份:1992
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负责人:Barry Voight
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依托单位:
Dome Deformation and Structural Collapse at Merapi Volcano, Java
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批准号:9106134
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项目类别:Continuing Grant
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资助金额:$15.5万
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财政年份:1991
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负责人:Barry Voight
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依托单位:
Materials Science Approach to Volcanic Eruption Prediction
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批准号:8904990
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项目类别:Continuing Grant
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资助金额:$17.51万
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财政年份:1989
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负责人:Barry Voight
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依托单位:
Tjornes Fractures Zone Tectonic Project, Northern Iceland
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批准号:8206930
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项目类别:Continuing Grant
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资助金额:$9.69万
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财政年份:1982
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负责人:Barry Voight
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依托单位:
Tectonics of the Tjornes Fracture Zone and Lithospheric Thinning, Northern Iceland
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批准号:7904268
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项目类别:Continuing Grant
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资助金额:$14.56万
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财政年份:1979
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负责人:Barry Voight
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依托单位:
Fracture and Stress Analysis of Rock Stress-Measurement Sites in Iceland
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批准号:7812933
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项目类别:Standard Grant
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资助金额:$3.5万
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财政年份:1978
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负责人:Barry Voight
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依托单位:
国内基金
海外基金
基于seismic interferometry的海上勘探数据重建方法研究
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批准号:40904030
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项目类别:青年科学基金项目
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资助金额:20.0万元
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批准年份:2009
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负责人:王一博
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依托单位: