Temporal variation in crustal structure derived from hybrid analysis of the seismic attenuation and anisotropy

地震衰减和各向异性混合分析得出的地壳结构随时间变化

• 批准号: 21740328
• 负责人: TADOKORO Keiichi
• 金额: $ 2.75万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21740328/
• 关键词: 観測手法; 地震波の減衰; 地震波異方性; 地殻構造; 群発地震; 火山; S波偏向異方性; 地殻内流体; 地震; 偏向異方性

We detected a crack structure with high crack density, whose direction is parallel to the epicenter alignment, in the region of the 2009 earthquake swarm at the Hakone volcano.Crustal fluid was included in the above crack structure during the earthquake swarm period. It was suggested that another crack structure was dominant during the period without earthquake swarm. This study presents that crustal structure possibly varies accompanied with occurrences of earthquake swarm.

我们在2009年箱根火山地震群区域检测到了一个高裂缝密度的裂缝结构，其方向与震中线平行。地震群发生期间，上述裂缝结构中含有地壳流体。有人认为，在没有震群的时期，另一种裂缝结构占主导地位。这项研究表明，地壳结构可能随着地震群的发生而发生变化。