Analysis of the Badong Ms5.1 earthquake source characteristics
The mainshock location of the Badong Ms5.1 earthquake is determined using four location methods: the simplex method, HYP2000, hyposat, and locSAT; the 350 aftershocks over 3 months are relocated using the double difference location method. The results indicate that aftershocks are distributed as ban...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2014-11-01
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| Series: | Geodesy and Geodynamics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1674984715300409 |
| _version_ | 1818617792680689664 |
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| author | Wu Haibo Chen Junhua Shen Xuelin Zhang Lifen Zhao Lingyun Zhang Ke |
| author_facet | Wu Haibo Chen Junhua Shen Xuelin Zhang Lifen Zhao Lingyun Zhang Ke |
| author_sort | Wu Haibo |
| collection | DOAJ |
| description | The mainshock location of the Badong Ms5.1 earthquake is determined using four location methods: the simplex method, HYP2000, hyposat, and locSAT; the 350 aftershocks over 3 months are relocated using the double difference location method. The results indicate that aftershocks are distributed as bands along the NEE direction and that the aftershocks 1 month after the mainshock, which are mainly distributed in the west of the mainshock and near the Gaoqiao fault, are shallow earthquakes within 5 km; the depth of each aftershock after one month is deeper, and two distinct fault planes, for which the geological occurrence is similar to the Gaoqiao and Zhoujiashan-Niukou fault, are shaped. The frequency-spectrum analysis of the recorded waveform in 12 seismic events indicates that the corner frequency of the mainshock is significantly lower than that of its aftershock and is also lower than a tectonic earthquake of the same magnitude. We considered that this result is related to the constraint of the parameter calibration relationship in the focal spectrum and the lithology change due to water erosion. Combined with the focal mechanism and geological tectonic setting, we conclude that the occurrence of the earthquake is related to the activity of the Daping and Gaoqiao fault and is a reservoir-induced tectonic seismicity. |
| first_indexed | 2024-12-16T17:11:20Z |
| format | Article |
| id | doaj.art-7d46dd2b696a43f296722fc8a38744ca |
| institution | Directory Open Access Journal |
| issn | 1674-9847 |
| language | English |
| last_indexed | 2024-12-16T17:11:20Z |
| publishDate | 2014-11-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Geodesy and Geodynamics |
| spelling | doaj.art-7d46dd2b696a43f296722fc8a38744ca2022-12-21T22:23:24ZengKeAi Communications Co., Ltd.Geodesy and Geodynamics1674-98472014-11-0154162410.3724/SP.J.1246.2014.04016Analysis of the Badong Ms5.1 earthquake source characteristicsWu Haibo0Chen Junhua1Shen Xuelin2Zhang Lifen3Zhao Lingyun4Zhang Ke5Key Laboratory of Earthquake Geodesy, Institute of Seismology, China Earthquake Administration, Wuhan 430071, ChinaKey Laboratory of Earthquake Geodesy, Institute of Seismology, China Earthquake Administration, Wuhan 430071, ChinaKey Laboratory of Earthquake Geodesy, Institute of Seismology, China Earthquake Administration, Wuhan 430071, ChinaKey Laboratory of Earthquake Geodesy, Institute of Seismology, China Earthquake Administration, Wuhan 430071, ChinaKey Laboratory of Earthquake Geodesy, Institute of Seismology, China Earthquake Administration, Wuhan 430071, ChinaEarthquake Administration of Shiyan City, Shiyan 442000, ChinaThe mainshock location of the Badong Ms5.1 earthquake is determined using four location methods: the simplex method, HYP2000, hyposat, and locSAT; the 350 aftershocks over 3 months are relocated using the double difference location method. The results indicate that aftershocks are distributed as bands along the NEE direction and that the aftershocks 1 month after the mainshock, which are mainly distributed in the west of the mainshock and near the Gaoqiao fault, are shallow earthquakes within 5 km; the depth of each aftershock after one month is deeper, and two distinct fault planes, for which the geological occurrence is similar to the Gaoqiao and Zhoujiashan-Niukou fault, are shaped. The frequency-spectrum analysis of the recorded waveform in 12 seismic events indicates that the corner frequency of the mainshock is significantly lower than that of its aftershock and is also lower than a tectonic earthquake of the same magnitude. We considered that this result is related to the constraint of the parameter calibration relationship in the focal spectrum and the lithology change due to water erosion. Combined with the focal mechanism and geological tectonic setting, we conclude that the occurrence of the earthquake is related to the activity of the Daping and Gaoqiao fault and is a reservoir-induced tectonic seismicity.http://www.sciencedirect.com/science/article/pii/S1674984715300409precise location of the mainshockdouble difference locationdeep profilecorner frequency |
| spellingShingle | Wu Haibo Chen Junhua Shen Xuelin Zhang Lifen Zhao Lingyun Zhang Ke Analysis of the Badong Ms5.1 earthquake source characteristics Geodesy and Geodynamics precise location of the mainshock double difference location deep profile corner frequency |
| title | Analysis of the Badong Ms5.1 earthquake source characteristics |
| title_full | Analysis of the Badong Ms5.1 earthquake source characteristics |
| title_fullStr | Analysis of the Badong Ms5.1 earthquake source characteristics |
| title_full_unstemmed | Analysis of the Badong Ms5.1 earthquake source characteristics |
| title_short | Analysis of the Badong Ms5.1 earthquake source characteristics |
| title_sort | analysis of the badong ms5 1 earthquake source characteristics |
| topic | precise location of the mainshock double difference location deep profile corner frequency |
| url | http://www.sciencedirect.com/science/article/pii/S1674984715300409 |
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