Probing the Southern Cascadia Plate Interface With the Dense Amphibious Cascadia Initiative Seismic Array
Probing the Southern Cascadia Plate Interface With the Dense Amphibious Cascadia Initiative Seismic Array
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利用密集的两栖卡斯卡迪亚倡议地震台阵探测南卡斯卡迪亚板块界面
DOI：
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
D. Small
中科院分区：
文献类型：
--
作者：
T. Alongi;Susan Y. Schwartz;H. R. Shaddox;D. Small
断层耦合对于确定沿沿着断层累积的应变量至关重要。在高度耦合的区域中存储的弹性应变能的大小和位置对于理解板块边界断层的全方位滑动行为以及地震和海啸灾害具有重要意义。我们使用卡斯卡迪亚计划提供的临时密集两栖地震仪阵列来创建高分辨率的事件目录，以检查板块界面附近地震的时空行为。数据显示，在卡斯卡迪亚南部，大地锁定区域的板块界面上倾几乎没有地震活动，因此可能高度耦合和积累应变。该目录揭示了聚集在高度耦合的巨型逆冲断层的下倾边缘的事件，这些事件在时间上与附近的应变瞬态观测相关。使用北方加州地震台网的永久台站对2010年至2020年10年间的集群中的事件进行模板匹配，表明该集群在空间和时间上是独特的。它的活动，只有在应变瞬变提供支持的效用，地震观测的应变瞬变识别。
Fault coupling is vital in determining the amount of strain that is accumulated along faults. The magnitude and location of stored elastic strain energy in highly coupled regions has important implications for understanding the full range of slip behavior at plate boundary faults, as well as earthquake and tsunami hazards. We use the temporary dense amphibious array of seismometers offered by the Cascadia Initiative to create a high‐resolution catalog of events to examine the spatio‐temporal behavior of earthquakes near the plate interface. The data show that in southern Cascadia the plate interface updip of the geodetically locked region is nearly devoid of seismicity, therefore likely highly coupled and accumulating strain. The catalog reveals events that are clustered at the downdip edge of the highly coupled megathrust that correlate in time with nearby strain transient observations. Template matching of events in the cluster using permanent stations of the Northern California Seismic Network over a 10‐year period between 2010 and 2020 indicates that this cluster is unique in space and time. Its activity only during the strain transient provides support for the utility of seismic observations in the identification of strain transients.
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影响因子：
5.2
作者：
K. Materna;T. Taira;R. Bürgmann
通讯作者：
K. Materna;T. Taira;R. Bürgmann
影响因子：
5.2
作者：
Materna, Kathryn;Bartlow, Noel;Buergmann, Roland
通讯作者：
Buergmann, Roland
DOI：
10.1029/2019jb018221
发表时间：
2019-10
期刊：
Journal of Geophysical Research: Solid Earth
影响因子：
--
作者：
T. Lay;Chengli Liu;H. Kanamori
通讯作者：
T. Lay;Chengli Liu;H. Kanamori
浅层巨型逆冲断层的滑移率赤字和地震潜力
影响因子：
18.3
作者：
Lindsey E
通讯作者：
Lindsey E