Detection of vertical motion during a slow-slip event off the Boso Peninsula, Japan, by ocean-bottom pressure gauges
Detection of vertical motion during a slow-slip event off the Boso Peninsula, Japan, by ocean-bottom pressure gauges
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通过海底压力计检测日本房总半岛附近慢滑移事件期间的垂直运动
DOI：
10.1002/2017gl072838
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发表时间：
2017
影响因子：
5.2
通讯作者：
Norihisa Usui
中科院分区：
文献类型：
--
作者：
Toshinori Sato;Seiya Hasegawa;Akihiro Kono;Hajime Shiobara;Takeo Yagi;Tomoaki Yamada;Masanao Shinohara;Norihisa Usui
本文利用海底压力计（OBP）观测资料确定了日本博索半岛附近一次慢滑事件（SSE）的滑动分布。大多数大型sse发生在海洋之下，以前使用连续的OBP测量来检测它们。这些测量需要通过从每个OBP数据集中减去多个站点的平均数据来消除海洋变化，这种方法需要多个站点。我们开发了一种从单个OBP站数据中提取目标事件瞬态变形的新方法。我们拟合了一个考虑线性趋势、季节变化和其他影响的OBP数据模型，以检测2014年Boso SSE期间的瞬态变形。我们确定OBP观测精度为±10 mm，并利用赤池信息准则客观地确定了20 mm的隆起。我们的方法提高了测量海底地壳滑动分布的潜力。
We determined the slip distribution of a slow‐slip event (SSE) off the Boso Peninsula, Japan, from ocean bottom pressure gauge (OBP) observations. Most large SSEs occur under the ocean, and continuous OBP measurements have been used previously for their detection. These measurements require removing oceanic changes by subtracting averaged data of multiple stations from each OBP data set, a method that requires multiple stations. We developed a new method for extracting transient deformation due to a targeted event from data of a single OBP station. We fit a model that takes account of linear trends, seasonal variations, and other effects to the OBP data to detect transient deformation during the 2014 Boso SSE. We determined the OBP observation accuracy to be ±10 mm and detected 20 mm of uplift which was objectively confirmed by using Akaike's information criterion. Our method improves the potential for measuring slip distributions of SSEs under the ocean.