Earthquake triggering by migrating slow slip initiated by M8 earthquake along Kuril Trench, Japan

• Published in: Geophysical research letters Vol. 33; no. 9; pp. L09306 - n/a
• Main Authors: Murakami, Makoto, Suito, Hisashi, Ozawa, Shinzaburo, Kaidzu, Masaru
• Format: Journal Article
• Language: English
• Published: Washington, DC American Geophysical Union 01.05.2006; Blackwell Publishing Ltd
• Subjects: Earth sciences; Earth, ocean, space; Earthquake interaction, forecasting, and prediction; Exact sciences and technology; Geodesy and Gravity; Marine; results; Satellite geodesy; Seismic cycle related deformations; Seismicity and tectonics; Seismology; Transient deformation; Japan Trench; West Pacific; Tokachi; Japan; Hokkaido; Kuril Trench; Far East; Northwest Pacific; INW, Pacific, Kuril Trench; Japan, Hokkaido; stress; Asia; slip; reliability; Pacific Ocean; plate boundaries; earthquakes; Triggering; offshore; rupture; Global Positioning System
• ISSN: 0094-8276; 1944-8007
• DOI: 10.1029/2006GL025967

Evidence of a slow slip temporally ahead of the M7 earthquake doublet that occurred in November/December 2004 offshore of eastern Hokkaido, Japan, was registered in continuous GPS measurements. The GPS data suggest that a slow slip around a forthcoming rupture zone on the plate boundary triggered these earthquakes. This slow slip episode was itself triggered by the M8 Tokachi earthquake of September 2003. This is a demonstration of the geodetic visualization of the mechanism of a triggering of a subsequent earthquake caused by a preceding large earthquake. The geodetic data will improve the reliability of the warning of an occurrence of a subsequent earthquake after a large one that is currently dependent on only co‐seismic static stress increase.