Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL077260 |
Imaging a Crustal Low-Velocity Layer Using Reflected Seismic Waves From the 2014 Earthquake Swarm at Long Valley Caldera, California: The Magmatic System Roof? | |
Nakata, Nori1; Shelly, David R.2 | |
2018-04-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:8页码:3481-3488 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The waveforms generated by the 2014 Long Valley Caldera earthquake swarm recorded at station MLH show clear reflected waves that are often stronger than direct P and S waves. With waveform analyses, we discover that these waves are reflected at the top of a low-velocity body, which may be residual magma from the similar to 767 ka caldera-forming eruption. The polarity of the reflection compared to direct P and S waves suggests that the reflection is SP waves (S from hypocenters to reflector and then convert to P waves to the surface). Because the wavefields are coherent among different earthquakes and hold high signal-to-noise ratios, we apply them to a wavefield migration method for imaging reflectors. The depth of the imaged magmatic system roof is around 8.2 km below the surface. This is consistent with previous studies. Even though we use only one station and waveforms from one earthquake swarm, the dense cluster of accurately located earthquakes provides a high-resolution image of the roof. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000435745500020 |
WOS关键词 | REVERSE TIME MIGRATION ; MAMMOTH MOUNTAIN ; TELESEISMIC TOMOGRAPHY ; EASTERN CALIFORNIA ; FAULT STRUCTURE ; MONO CRATERS ; BENEATH ; ATTENUATION ; REGION ; MODEL |
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/25668 |
专题 | 气候变化 |
作者单位 | 1.Univ Oklahoma, ConocoPhillips Sch Geol & Geophys, Norman, OK 73019 USA; 2.US Geol Survey, 345 Middlefield Rd, Menlo Pk, CA 94025 USA |
推荐引用方式 GB/T 7714 | Nakata, Nori,Shelly, David R.. Imaging a Crustal Low-Velocity Layer Using Reflected Seismic Waves From the 2014 Earthquake Swarm at Long Valley Caldera, California: The Magmatic System Roof?[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(8):3481-3488. |
APA | Nakata, Nori,&Shelly, David R..(2018).Imaging a Crustal Low-Velocity Layer Using Reflected Seismic Waves From the 2014 Earthquake Swarm at Long Valley Caldera, California: The Magmatic System Roof?.GEOPHYSICAL RESEARCH LETTERS,45(8),3481-3488. |
MLA | Nakata, Nori,et al."Imaging a Crustal Low-Velocity Layer Using Reflected Seismic Waves From the 2014 Earthquake Swarm at Long Valley Caldera, California: The Magmatic System Roof?".GEOPHYSICAL RESEARCH LETTERS 45.8(2018):3481-3488. |
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