Low frequency events occurred during the sequence of aftershock activity of the 2003 Tokachi-Oki earthquake; a dynamic process of the tectonic erosion by subducted seamount

被引：9

作者：

Obara, K ^{[1
]}

Haryu, Y ^{[1
]}

Ito, Y ^{[1
]}

Shiomi, K ^{[1
]}

机构：

[1] Natl Res Inst Earth Sci & Disaster Prevent, Tsukuba, Ibaraki 3050006, Japan

来源：

EARTH PLANETS AND SPACE | 2004年 / 56卷 / 03期

关键词：

low-frequency earthquake; 2003 Tokachi-Oki earthquake; subduction zone; tectonic erosion; seamount; plate boundary;

D O I：

10.1186/BF03353063

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

During the sequence of aftershock activity of the 2003 Tokachi-Oki earthquake, anomalous events predominant in low-frequency components occurred very close to a subducted seamount around the junction between the Kuril Trench and the Japan Trench. The low-frequency wave train in the coda part reflects the strong excitation of surface waves and the source depth is considered to be very shallow. The focal mechanism of the low-frequency event is a type of the reverse fault. Considering with the source depth and the mechanism, the low-frequency event might have occurred on the plate boundary as a dynamic process of the tectonic erosion by the subducted seamount.

引用

页码：347 / 351

页数：5

共 15 条

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