Investigating source parameters of small and moderate earthquakes plays an important role in seismology research. For small and moderate earthquakes, the mechanisms are usually obtained by first motion of P-Wave, surf...Investigating source parameters of small and moderate earthquakes plays an important role in seismology research. For small and moderate earthquakes, the mechanisms are usually obtained by first motion of P-Wave, surface wave spectra method in frequency-domain or the waveform inversion in time-domain, based on the regional waveform records. We applied the wavelet domain inversion method to determine mechanism of regional earthquake. Using the wavelet coefficients of different scales can give more information to constrain the inversion. We determined the mechanisms of three earthquakes occurred in California, the United States. They are consistent with the previous results (Harvard Centroid Moment Tensor and United States Geological Service). This proves that the wavelet domain inversion method is an efficient method to determine the source parameters of small and moderate earthquakes, especially the strong aftershocks after a large, disastrous earthquake.展开更多
根据中国地震台网中心测定,北京时间2021年5月22日02时04分,中国青海省果洛州玛多县发生了震级达到M7.4的地震,震中位于(98.34°E,34.59°N),震源深度为17 km。美国地质调查局(United States Geological Survey,缩写为USGS)国...根据中国地震台网中心测定,北京时间2021年5月22日02时04分,中国青海省果洛州玛多县发生了震级达到M7.4的地震,震中位于(98.34°E,34.59°N),震源深度为17 km。美国地质调查局(United States Geological Survey,缩写为USGS)国家地震信息中心(National Earthquake Information Centre,缩写为NEIC)也给出了相应的结果,其标定的发震时间为北京时间2021年5月22日02时04分13秒(协调世界时:2021年5月21日18时04分13秒),震中位于(98.2548°E,34.5864°N),震源深度为10 km。震后16小时内在震中100 km范围内共发生M>4.3的余震10次。展开更多
根据美国地质调查局(United States Geological Survey,缩写为USGS)国家地震信息中心(National Earthquake Information Centre,缩写为NEIC)的测定,2021年2月13日14时7分50秒(UTC),日本本州以东发生了一次矩震级高达M_(W)7.2的地震,震...根据美国地质调查局(United States Geological Survey,缩写为USGS)国家地震信息中心(National Earthquake Information Centre,缩写为NEIC)的测定,2021年2月13日14时7分50秒(UTC),日本本州以东发生了一次矩震级高达M_(W)7.2的地震,震中位于(37.745°N,141.749°E),震源深度为49.94 km,这是截至本文发稿时最终更新的定位结果,更新前为(37.686°N,141.992°E),震源深度为54.0 km。展开更多
根据美国地质调查局(United States Geological Survey,缩写为USGS)国家地震信息中心(National Earthquake Information Centre,缩写为NEIC)的测定,2020年6月23日15时29分04秒(UTC),墨西哥南部瓦哈卡州发生了一次矩震级MW7.4的地震,NEI...根据美国地质调查局(United States Geological Survey,缩写为USGS)国家地震信息中心(National Earthquake Information Centre,缩写为NEIC)的测定,2020年6月23日15时29分04秒(UTC),墨西哥南部瓦哈卡州发生了一次矩震级MW7.4的地震,NEIC初步确定的震中(preliminary determination epicenter,缩写为PDE)位于(15.9163°N,95.9533°W)。展开更多
基金supported by National Natural Science Foundation of China (Grant Nos. 40974028 and 41030319)National Basic Research Program of China (Grant No. 2008CB425701)
文摘Investigating source parameters of small and moderate earthquakes plays an important role in seismology research. For small and moderate earthquakes, the mechanisms are usually obtained by first motion of P-Wave, surface wave spectra method in frequency-domain or the waveform inversion in time-domain, based on the regional waveform records. We applied the wavelet domain inversion method to determine mechanism of regional earthquake. Using the wavelet coefficients of different scales can give more information to constrain the inversion. We determined the mechanisms of three earthquakes occurred in California, the United States. They are consistent with the previous results (Harvard Centroid Moment Tensor and United States Geological Service). This proves that the wavelet domain inversion method is an efficient method to determine the source parameters of small and moderate earthquakes, especially the strong aftershocks after a large, disastrous earthquake.
文摘根据中国地震台网中心测定,北京时间2021年5月22日02时04分,中国青海省果洛州玛多县发生了震级达到M7.4的地震,震中位于(98.34°E,34.59°N),震源深度为17 km。美国地质调查局(United States Geological Survey,缩写为USGS)国家地震信息中心(National Earthquake Information Centre,缩写为NEIC)也给出了相应的结果,其标定的发震时间为北京时间2021年5月22日02时04分13秒(协调世界时:2021年5月21日18时04分13秒),震中位于(98.2548°E,34.5864°N),震源深度为10 km。震后16小时内在震中100 km范围内共发生M>4.3的余震10次。
文摘根据美国地质调查局(United States Geological Survey,缩写为USGS)国家地震信息中心(National Earthquake Information Centre,缩写为NEIC)的测定,2021年2月13日14时7分50秒(UTC),日本本州以东发生了一次矩震级高达M_(W)7.2的地震,震中位于(37.745°N,141.749°E),震源深度为49.94 km,这是截至本文发稿时最终更新的定位结果,更新前为(37.686°N,141.992°E),震源深度为54.0 km。
文摘根据美国地质调查局(United States Geological Survey,缩写为USGS)国家地震信息中心(National Earthquake Information Centre,缩写为NEIC)的测定,2020年6月23日15时29分04秒(UTC),墨西哥南部瓦哈卡州发生了一次矩震级MW7.4的地震,NEIC初步确定的震中(preliminary determination epicenter,缩写为PDE)位于(15.9163°N,95.9533°W)。
