Short‐term slow slip and correlated tremor episodes in the Tokai region, central Japan
Short‐term slow slip and correlated tremor episodes in the Tokai region, central Japan
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日本中部东海地区的短期慢滑和相关震颤发作
DOI：
10.1029/2006gl026579
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发表时间：
2006
影响因子：
5.2
通讯作者：
K. Obara
中科院分区：
文献类型：
--
作者：
H. Hirose;K. Obara
我们在 1944 年东南海地震和预期的日本中部东海地震破裂区的更深延伸区域观察到短期慢滑事件 (SSE) 和低频非火山地震的相关现象。日本全国范围的地震仪和倾斜仪阵列 NIED Hi-net 在 2004 年和 2005 年记录了 SSE 和震颤的相关事件，称为偶发性震颤和滑移（ETS）。事件发生在东海地区的两个地区，一个在志摩半岛附近，另一个在爱知地区周围。两次地震的典型持续时间均为 2-3 天，释放的地震矩对应于 Mw ∼ 6.0。此外，这些事件在这两个地区反复发生，复发间隔约为六个月。这一证据表明，SSE与震颤的重合是南开海槽俯冲带整个震颤带状带的特征行为。
We observe the related phenomenon of short‐term slow slip event (SSE) and low‐frequency nonvolcanic tremor on the deeper extension of the 1944 Tonankai and the anticipated Tokai earthquake rupture areas, central Japan. Japan nation‐wide seismometer and tiltmeter array, NIED Hi‐net has recorded these correlated episodes of SSE and tremor, known as episodic tremor and slip (ETS) in 2004 and 2005. The events are located on two areas in the Tokai region, one is near the Shima peninsula, and the other is around the Aichi area. Both episodes have a typical duration of 2–3 days and released seismic moment corresponding to Mw ∼ 6.0. Moreover, these episodes repeatedly occur with a recurrence interval of about six months in both areas. This evidence suggests that the coincidence between the SSE and the tremor is a characteristic behavior in the whole tremor belt‐like zone in the Nankai trough subduction zone.