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| 2019年北京海淀M2.9和怀柔M3.0地震震源参数测定 | |
| 引用本文： | 刘敬光,黄志斌,梁姗姗. 2019年北京海淀M2.9和怀柔M3.0地震震源参数测定[J]. 地震科学进展, 2019, 0(9): 2-6. DOI: 10.3969/j.issn.0253-4975.2019.09.002 |
| 作者姓名： | 刘敬光 黄志斌 梁姗姗 |
| 作者单位： | 1.防灾科技学院，河北燕郊0652012.中国地震台网中心，北京100045 |
| 基金项目： | 中央高校基本科研业务费（ZY20190302）资助。 |
| 摘 要： | 本文介绍了2019年4月7日北京海淀M2.9及4月14日北京怀柔M3.0地震的基本参数速报情况，并利用区域台网波形数据，采用全波形反演方法ISOLA获得了这两次地震的最佳双力偶解。反演结果显示:M2.9地震的节面Ⅰ走向29°，倾角70°，滑动角?149°，节面Ⅱ走向288°，倾角61°，滑动角?22°；矩心深度14 km，矩震级MW=3.4。M3.0地震的节面Ⅰ走向93°，倾角84°，滑动角?30°，节面Ⅱ走向186°，倾角60°，滑动角173°；矩心深度16 km，矩震级MW=3.4。震源机制反演结果表明，两次地震均为走滑型为主的地震，其与震源区域附近历史地震震源机制解具有相同性质。 |
| 关 键 词： | 地震参数 全波形反演 震源机制解 |
| 收稿时间： | 2019-07-25 |
Determination of the source parameters of the Haidian M2.9 andthe Huairou M3.0 earthquakes in Beijing in 2019 |
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| Affiliation: | 1.Institute of Disaster Prevention，Hebei Yanjiao 065201，China2.China Earthquake Networks Center，Beijing 100045，China |
| Abstract: | The parameters of the April 7, 2019 Haidian M2.9 and the April 14, 2019 Huairou M3.0 earthquakes in Beijing are rapidly determined by the CENC. The best double-couple solutions of the two earthquakes in Beijing are studied by the ISOLA full-waveform method using the observed waveform data from the regional seismic networks. The result of this study shows: for the M2.9 earthquake: strike=29°, dip=70° and rake=-149° for nodal plane I, and strike=288°, dip=61° and rake=-22° for nodal plane II. The centroid depth is about 14 km and the moment magnitude （MW） is 3.4; And for the M3.0 earthquake: strike=93°, dip=84° and rake=-30° for nodal plane I, and strike=186°, dip=60° and rake=173° for nodal plane II; the centroid depth is about 16 km and the moment magnitude （MW） is 3.4. The focal mechanism inversion shows that these 2 earthquakes are both strike-slip events, which are of the same type as the historical quakes in the adjacent area. |
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