Permalink : http://hdl.handle.net/2115/32764

JaLCDOI : 10.14943/gbhu.71.103

Secular and short term strain variations before and after the 2003 Tokachi-Oki earthquake, Mw8.0, recorded at five continuous crustal movement stations located along the Pacific coast are reported. There is no obvious forerunner movement at all stations. However, clear co-seismic and post-seismic strain changes are recorded at all stations. Strain data are digitized by 18 bits with 1 Hz sampling rate so that the complete strain seismogram of Mw8.0 event were recorded at MYR station nearest the source of the event. Strain seismograms recorded at all stations in Hokkaido are also reported.