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DOI | 10.1029/2019GL084135 |
A Dynamic Rupture Source Model for Very Low-Frequency Earthquake Signal Without Detectable Nonvolcanic Tremors | |
Wu, Baoning1; Oglesby, David D.1; Ghosh, Abhijit1; Li, Bo2 | |
2019-11-13 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:21页码:11934-11943 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Germany |
英文摘要 | A very low-frequency earthquake is a type of seismic event that is rich in low frequencies and depleted in higher frequencies compared to regular fast local earthquakes of similar magnitude. The source process behind very low-frequency earthquakes is still poorly understood. Here we present a dynamic rupture source model for very low-frequency earthquake signal without detectable associated tremors. We show that a single asperity model with sudden stress drop followed by a rate strengthening effect damps the seismic radiation and increases event duration. We compute synthetic seismograms for our source model. The synthetic signal successfully reproduces the features of observed very low-frequency earthquakes. Moreover, the synthetic very low-frequency earthquake signal in 0.02-0.05 Hz is not accompanied by detectable tremor signals at 2-8 Hz. Our results help explain why in some cases we observe very low-frequency earthquakes without accompanying tremor. |
英文关键词 | very low-frequency earthquake dynamic rupture model slow earthquake |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000496180400001 |
WOS关键词 | SLOW EARTHQUAKES ; SLIP ; EVENTS ; SHEAR |
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/225004 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Univ Calif Riverside, Dept Earth & Planetary Sci, Riverside, CA 92521 USA; 2.Ludwig Maximilians Univ Munchen, Dept Earth & Environm Sci, Munich, Germany |
推荐引用方式 GB/T 7714 | Wu, Baoning,Oglesby, David D.,Ghosh, Abhijit,et al. A Dynamic Rupture Source Model for Very Low-Frequency Earthquake Signal Without Detectable Nonvolcanic Tremors[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(21):11934-11943. |
APA | Wu, Baoning,Oglesby, David D.,Ghosh, Abhijit,&Li, Bo.(2019).A Dynamic Rupture Source Model for Very Low-Frequency Earthquake Signal Without Detectable Nonvolcanic Tremors.GEOPHYSICAL RESEARCH LETTERS,46(21),11934-11943. |
MLA | Wu, Baoning,et al."A Dynamic Rupture Source Model for Very Low-Frequency Earthquake Signal Without Detectable Nonvolcanic Tremors".GEOPHYSICAL RESEARCH LETTERS 46.21(2019):11934-11943. |
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