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DOI | 10.1029/2018GL078621 |
Stronger Peak Ground Motion, Beyond the Threshold to Initiate a Response, Does Not Lead to Larger Stream Discharge Responses to Earthquakes | |
Mohr, Christian H.1; Manga, Michael2; Wald, David3 | |
2018-07-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:13页码:6523-6531 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; USA |
英文摘要 | The impressive number of stream gauges in Chile, combined with a suite of past and recent large earthquakes, makes Chile a unique natural laboratory to study several streams that recorded responses to multiple seismic events. We document changes in discharge in eight streams in Chile following two or more large earthquakes. In all cases, discharge increases. Changes in discharge occur for peak ground velocities greater than about 7-11cm/s. Above that threshold, the magnitude of both the increase in discharge and the total excess water do not increase with increasing peak ground velocities. While these observations are consistent with previous work in California, they conflict with lab experiments that show that the magnitude of permeability changes increases with increasing amplitude of ground motion. Instead, our study suggests that streamflow responses are binary. Plain Language Summary Earthquakes deform and shake the surface and the ground below. These changes may affect groundwater flows by increasing the permeability along newly formed cracks and/or clearing clogged pores. As a result, groundwater flow may substantially increase after earthquakes and remain elevated for several months. Here we document streamflow anomalies following multiple high magnitude earthquakes in multiple streams in one of the most earthquake prone regions worldwide, Chile. We take advantage of the dense monitoring network in Chile that recorded streamflow since the 1940s. We show that once a critical ground motion is exceeded, streamflow responses to earthquakes can be expected. |
英文关键词 | earthquake streamflow shaking Chile modeling |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000439784300022 |
WOS关键词 | INDUCED HYDROLOGICAL CHANGES ; 1995 KOBE EARTHQUAKE ; PERMEABILITY ENHANCEMENT ; MEGATHRUST EARTHQUAKE ; CENTRAL CHILE ; LOMA-PRIETA ; FAULT ZONE ; LIQUEFACTION ; WATER ; CALIFORNIA |
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/26449 |
专题 | 气候变化 |
作者单位 | 1.Univ Potsdam, Inst Earth & Environm Sci, Potsdam, Germany; 2.Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA; 3.US Geol Survey, Golden, CO USA |
推荐引用方式 GB/T 7714 | Mohr, Christian H.,Manga, Michael,Wald, David. Stronger Peak Ground Motion, Beyond the Threshold to Initiate a Response, Does Not Lead to Larger Stream Discharge Responses to Earthquakes[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(13):6523-6531. |
APA | Mohr, Christian H.,Manga, Michael,&Wald, David.(2018).Stronger Peak Ground Motion, Beyond the Threshold to Initiate a Response, Does Not Lead to Larger Stream Discharge Responses to Earthquakes.GEOPHYSICAL RESEARCH LETTERS,45(13),6523-6531. |
MLA | Mohr, Christian H.,et al."Stronger Peak Ground Motion, Beyond the Threshold to Initiate a Response, Does Not Lead to Larger Stream Discharge Responses to Earthquakes".GEOPHYSICAL RESEARCH LETTERS 45.13(2018):6523-6531. |
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