The RESNOM seismic catalog and its bearing on the seismicity of Northwestern Mexico
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| Natura: | Artículo científico |
| Lingua: | en |
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Universidad Nacional Autónoma de México
2005
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| _version_ | 1876424603294760960 |
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| author | F. Ramón Zúñiga |
| author_facet | F. Ramón Zúñiga |
| contents | The RESNOM seismic catalog and its bearing on the seismicity of Northwestern Mexico F. Ramón Zúñiga Raúl R. Castro Ciencias de la Tierra Mexico Seismic history seismic catalog Baja California natural variations The catalog of the Red Sísmica del Noroeste de México (RESNOM) operated by CICESE is investigated. Probable artificialeffects are detected. Current values for the minimum magnitude of completeness (Mc) and its spatial variations are outlined.Significant changes in reporting were found during early 1987, mid 1992, and early 1997. By inspecting the bulletins for 1987 to1992 we found that the rate of located to recorded events was close to 50%. Comparing cumulative and non cumulative rates for1987 - 1992.4 with 1992.4 1997.11 there is a difference of about 60% in the trends of located events. The difference is greater inthe region of maximum resolution of the network. The change for the period 1992.4 to 1997.11 as compared to 1997.11 to 2001.5does not warrant a correction; however, the number of events with duration magnitude Md ≤ 3.5 reported during the most recentinterval is 38% larger than for the preceding period. Magnitudes calculated by RESNOM (Md) and PDE (mb) match if the magnitudesreported by RESNOM are increased by 0.1. The same correction should be applied when merging data from RESNOM withSSN. The minimum magnitude of completeness for current reporting is 2.4 Some areas with good coverage, in particular around32°N and 116.5°W, can detect magnitudes as low as 1.6. The resolution of the network in some areas has improved considerably,with Mc decreasing as much as 1 magnitude unit. 2005 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56844202 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.2 Vol.44 |
| format | Artículo científico |
| id | redalyc_56844202 |
| institution | Redalyc |
| language | en |
| publishDate | 2005 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | The RESNOM seismic catalog and its bearing on the seismicity of Northwestern Mexico F. Ramón Zúñiga Ciencias de la Tierra Mexico Seismic history seismic catalog Baja California natural variations The RESNOM seismic catalog and its bearing on the seismicity of Northwestern Mexico F. Ramón Zúñiga Raúl R. Castro Ciencias de la Tierra Mexico Seismic history seismic catalog Baja California natural variations The catalog of the Red Sísmica del Noroeste de México (RESNOM) operated by CICESE is investigated. Probable artificialeffects are detected. Current values for the minimum magnitude of completeness (Mc) and its spatial variations are outlined.Significant changes in reporting were found during early 1987, mid 1992, and early 1997. By inspecting the bulletins for 1987 to1992 we found that the rate of located to recorded events was close to 50%. Comparing cumulative and non cumulative rates for1987 - 1992.4 with 1992.4 1997.11 there is a difference of about 60% in the trends of located events. The difference is greater inthe region of maximum resolution of the network. The change for the period 1992.4 to 1997.11 as compared to 1997.11 to 2001.5does not warrant a correction; however, the number of events with duration magnitude Md ≤ 3.5 reported during the most recentinterval is 38% larger than for the preceding period. Magnitudes calculated by RESNOM (Md) and PDE (mb) match if the magnitudesreported by RESNOM are increased by 0.1. The same correction should be applied when merging data from RESNOM withSSN. The minimum magnitude of completeness for current reporting is 2.4 Some areas with good coverage, in particular around32°N and 116.5°W, can detect magnitudes as low as 1.6. The resolution of the network in some areas has improved considerably,with Mc decreasing as much as 1 magnitude unit. 2005 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56844202 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.2 Vol.44 |
| title | The RESNOM seismic catalog and its bearing on the seismicity of Northwestern Mexico |
| topic | Ciencias de la Tierra Mexico Seismic history seismic catalog Baja California natural variations |
| url | https://www.redalyc.org/articulo.oa?id=56844202 |