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Historical Seismograms - Evidence from the AD 2000 Izu Islands ...

Historical Seismograms - Evidence from the AD 2000 Izu Islands ...

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Digitization and Processing of J.M.A. Strong Motion Records 399II--- I>ITPFigure 9. Definition of (SV)~ and Tp.T (sec)Table 4. List of <strong>the</strong> Values of (SV)~ and Tp for Each ComponentEarthquake Station A I N- S Component E - W ComponentSanriki-OkiIwaki-OkiFukushima-Ken-Toho-OkiTonanksiNaknaidoSendaiMitoMito(1st)(2nd)(3rd)Sendai(1st)(3rd)MurotomisakiMishimaSumotoMi yaz akiTokachi-Oki AkitaSkataNiigataNihonkai-ChubuMoriNiigataTomakomai(km) h = 0.001 h = 0.02 h = 0.001 h = 0.02P I P TP (SV)P TP (SV)P TP (SV)P TP332 5 25 3.049 5 50 3.0122 5 43 6.0150 5 38 9.5164 4 62 6.0184 4 - -164 4 - -178 4 25 2.0313 4 71 2.5208 5 - -296 4 - -246 4 79 2.5377 3 147 7.0501 3 112 5.5231 4 63 9.0272 3 188 10.0328 2 134 9.516 13.0 - -35 2.5 57 2.031 6.5 62 4.027 9.5 60 17.534 6.5 81 11.0- _--36 2.021 2.017 3.5 25 3.057 2.0 112 2.0- __ -87 2.542 2.041 2.5 102 3.054 3.0 165 2.537 12.0 100 4.5--43 2.041 8.544 17.045 10.022 2.010 2.016 2.564 2.046 2.532 2.047 4.566 2.539 4.535 2.5 82 4.0 42 4.070 10.5 122 8.5 54 11.062 10.0 69 9.0 41 11.5A = Epicentral distance in km; I = Intensity (JMA scale); ( SV)~ = velocity responsespectra (peak value) in kine; Tp = period corresponding to (SV)~ in sec.

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