2010
DOI: 10.3319/tao.2009.08.25.01(t)
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Source Parameters of the 2005 Mw 7.2 Miyagi-Oki, Japan, Earthquake as Inferred from Teleseismic P-Waves

Abstract: We investigate the fault parameters of the 2005 Miyagi-Oki (Japan) earthquake using duration variations of teleseismic P-waves. The results show that the earthquake has a thrust-type mechanism and a seismic moment of 4.46 × 10 19 Nm. Rupture directivity analysis suggests that the earthquake occurred as a result of a bilateral faulting on the fault plane with a strike of 247°, a dip of 17° and a slip of 125°. The optimal rupture azimuth, measured counterclockwise from the strike on the fault plane, is 170° (or … Show more

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Cited by 3 publications
(4 citation statements)
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“…A far-field synthetic seismogram, u P (t), at a shallow focal depth for a given receiver can be expressed below (for details, refer to Kanamori and Stewart, 1976;Okal, 1992;Lin et al, 2006;Hwang et al, 2010).…”
Section: Methods For the P-wave Inversionmentioning
confidence: 99%
See 3 more Smart Citations
“…A far-field synthetic seismogram, u P (t), at a shallow focal depth for a given receiver can be expressed below (for details, refer to Kanamori and Stewart, 1976;Okal, 1992;Lin et al, 2006;Hwang et al, 2010).…”
Section: Methods For the P-wave Inversionmentioning
confidence: 99%
“…(1) into matrix form for completing the P-wave inversion at a given focal depth, and then determined the pseudo radiation pattern (M 0 R P , M 0 R pP , and M 0 R sP ) and source duration of each station, used sequentially to determine the source parameters. The pseudo radiation patterns are used to estimate the seismic moment and the fault plane solution; the derived source duration that varies with station azimuth is also used to perform the rupture directivity analysis (Lin et al, 2006;Hwang et al, 2010). The matrix form of the P-wave inversion with n data points is as follows: Fig.…”
Section: Methods For the P-wave Inversionmentioning
confidence: 99%
See 2 more Smart Citations