Body-wave attenuation near the rupture of the 1887 Sonora, México, earthquake (Mw 7.5)
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| Format: | Artículo científico |
| Langue: | en |
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Universidad Nacional Autónoma de México
2009
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| _version_ | 1876424855755161600 |
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| author | R. R. Castro |
| author_facet | R. R. Castro |
| contents | Body-wave attenuation near the rupture of the 1887 Sonora, México, earthquake (Mw 7.5) R. R. Castro C. I. Huerta O. Romero C. Jacques A. Hurtado A. I. Fernández Ciencias de la Tierra Sonora Mexico Seismic attenuation We analized body-waves of local and regional earthquakes recorded on the Seismic Network of Northeastern Sonora, México (RESNES) are used to determine empirical attenuation functions for P and S waves in the interval of 0.4-63 Hz. The epicenters are near to the surface rupture of the May 3, 1887 (M W 7.5) Bavispe, Sonora earthquake. Seismograms of vertical and horizontal components at of ground motion hypocentral distances of 25 to 150 km were used in a nonparametric model. The reported attenuation curves indicate that the spectral amplitudes decay faster in the first 40 km of the path and show different decay rate at approximately 80 km. We found that in the upper crust the exponential dependence of Q with frequency is the same for P and S waves, namely Q ~ f 1.1, but Q S is larger by a factor of 3. In the lower crust Q is more complex, showing a strong frequency dependence below 3 Hz and a weaker frequency dependence above 6 Hz. 2009 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56813220004 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.3 Vol.48 |
| format | Artículo científico |
| id | redalyc_56813220004 |
| institution | Redalyc |
| language | en |
| publishDate | 2009 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Body-wave attenuation near the rupture of the 1887 Sonora, México, earthquake (Mw 7.5) R. R. Castro Ciencias de la Tierra Sonora Mexico Seismic attenuation Body-wave attenuation near the rupture of the 1887 Sonora, México, earthquake (Mw 7.5) R. R. Castro C. I. Huerta O. Romero C. Jacques A. Hurtado A. I. Fernández Ciencias de la Tierra Sonora Mexico Seismic attenuation We analized body-waves of local and regional earthquakes recorded on the Seismic Network of Northeastern Sonora, México (RESNES) are used to determine empirical attenuation functions for P and S waves in the interval of 0.4-63 Hz. The epicenters are near to the surface rupture of the May 3, 1887 (M W 7.5) Bavispe, Sonora earthquake. Seismograms of vertical and horizontal components at of ground motion hypocentral distances of 25 to 150 km were used in a nonparametric model. The reported attenuation curves indicate that the spectral amplitudes decay faster in the first 40 km of the path and show different decay rate at approximately 80 km. We found that in the upper crust the exponential dependence of Q with frequency is the same for P and S waves, namely Q ~ f 1.1, but Q S is larger by a factor of 3. In the lower crust Q is more complex, showing a strong frequency dependence below 3 Hz and a weaker frequency dependence above 6 Hz. 2009 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56813220004 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.3 Vol.48 |
| title | Body-wave attenuation near the rupture of the 1887 Sonora, México, earthquake (Mw 7.5) |
| topic | Ciencias de la Tierra Sonora Mexico Seismic attenuation |
| url | https://www.redalyc.org/articulo.oa?id=56813220004 |