SPAC: An alternative method to estimate earthquake site effects in Mexico City
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| Format: | Artículo científico |
| Sprache: | en |
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Universidad Nacional Autónoma de México
2003
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| _version_ | 1876471487370625024 |
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| author | Hortencia Flores Estrella |
| author_facet | Hortencia Flores Estrella |
| contents | SPAC: An alternative method to estimate earthquake site effects in Mexico City Hortencia Flores Estrella Jorge Aguirre González Ciencias de la Tierra SPAC method site effect Microtremors microtremor array velocity structure Microtremor recordings are a very useful tool for microzonation studies because of simple data acquisition and analysis.The Spatial Autocorrelation Method (SPAC) proposed by Aki (1957), may be used to constrain the velocity structure underlyingthe site with microtremor array measurements, and the site effect (dominant period and amplification) can be calculated. In thispaper the SPAC method is applied to Ciudad Universitaria, Mexico City. Results are compared with those obtained by Kagawa(1996) with the F-K method. The velocity structure inferred using SPAC method is consistent with Kagawa´s results.We compare the transfer function obtained from the velocity model estimated by SPAC method with the transfer functionfrom Kagawa´s velocity model, and from spectral ratios of earthquake data.We conclude that the velocity structure of a site can be estimated from microtremor recordings by the SPAC method. 2003 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56842207 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.2 Vol.42 |
| format | Artículo científico |
| id | redalyc_56842207 |
| institution | Redalyc |
| language | en |
| publishDate | 2003 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | SPAC: An alternative method to estimate earthquake site effects in Mexico City Hortencia Flores Estrella Ciencias de la Tierra SPAC method site effect Microtremors microtremor array velocity structure SPAC: An alternative method to estimate earthquake site effects in Mexico City Hortencia Flores Estrella Jorge Aguirre González Ciencias de la Tierra SPAC method site effect Microtremors microtremor array velocity structure Microtremor recordings are a very useful tool for microzonation studies because of simple data acquisition and analysis.The Spatial Autocorrelation Method (SPAC) proposed by Aki (1957), may be used to constrain the velocity structure underlyingthe site with microtremor array measurements, and the site effect (dominant period and amplification) can be calculated. In thispaper the SPAC method is applied to Ciudad Universitaria, Mexico City. Results are compared with those obtained by Kagawa(1996) with the F-K method. The velocity structure inferred using SPAC method is consistent with Kagawa´s results.We compare the transfer function obtained from the velocity model estimated by SPAC method with the transfer functionfrom Kagawa´s velocity model, and from spectral ratios of earthquake data.We conclude that the velocity structure of a site can be estimated from microtremor recordings by the SPAC method. 2003 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56842207 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.2 Vol.42 |
| title | SPAC: An alternative method to estimate earthquake site effects in Mexico City |
| topic | Ciencias de la Tierra SPAC method site effect Microtremors microtremor array velocity structure |
| url | https://www.redalyc.org/articulo.oa?id=56842207 |