Unifying analysis of continyous crustal deformation data in Japan searching for Slow and Silent Earthquakes

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In fiscal year of 1995, at meeting in Shizuoka and Kyoto, we have held a consultation to unify the data format (the period 1991-1995) and analysis method. Following a consultation, we have unified the data format and calculated trend-terms of the crustal deformation data by using Tidal analysis program, BAYTAP-G.At meeting in Mizusawa, we havemade first reporte of studying.In fiscal year of 1996, following the previous fiscal, we have analyzed of the crustal deformation data. At meetingin Kochi, we have made a second report, and then at meeting in Sapporo, we have made final report that (1) The 1994 Off Sanriku Earthquake, after seismic shock, a remarkably postseismic strain change of about 10^<-8> order with the time constant of from about one to three days were recorded in the trend term of record at Erimo, Miyako and Esashi etc.atthe same time. That were similar change recorded at Esashi and Miyako's extensometer of The 1992 Off Sanriku Earthquake (2) The 1995 Hyogoken-nanbu Earthquake, from about harf a year before, the changes of trend-term were recorded at Yamasaki, Abuyama, Amagase and Osakayama at the same time.