| ¡ ID | 130 |
| ¡ Ží—Þ | ˜_•¶ |
| ¡ ƒ^ƒCƒgƒ‹ | Direct estimation of the Rayleigh Wave Phase Velocity in Microtremors |
| ¡ ’˜ŽÒ | @
Hidetaka Shiraishi@
é‹ÊŒ§ŠÂ‹«‰ÈŠw‘ÛƒZƒ“ƒ^[ @ Tatsuro Matsuoka@ é‹ÊŒ§ŠÂ‹«‰ÈŠw‘ÛƒZƒ“ƒ^[ @ Hiroshi Asanuma@ “Œ–k‘åŠwE‘åŠw‰@ŠÂ‹«‰ÈŠwŒ¤‹†‰È @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ |
| ¡ o”ÅŒ³ | •Ä’n‹…•¨—Šw‰ï |
| ¡ o”Å”N | 2006 |
| ¡ Ž–¼EŠªE†E”N | Geophysical Research Letters, Vol.33, No.18, L18307, 2006 |
| ¡ ´˜^E—vŽ| | We present a new estimation technique using a circular array for the Rayleigh wave phase velocity in microtremors. This technique allows us to employ more flexible sensor arrangements than that of Aki's spatial autocorrelation technique. One of the features is that the array output is represented by simultaneous equations consisting of complex coherence functions (CCFs). Theoretical inspection suggests the phase velocity can be determined by extracting J0(ƒÖr/c) (ƒÖ: angular frequency, r: radius, c: phase velocity) from the CCFs. Therefore, we tried to directly estimate J0(ƒÖr/c) without the azimuthal averaging and developed a solution method referred to as the direct estimation method. |
| ¡ ƒL[ƒ[ƒh | Rayleigh wave, phase velocity, microtremor |
| ˆê——‚É–ß‚é |