| 2019年地震活动综述 |
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| 引用本文： | 杜方.2019年地震活动综述[J].四川地震,2020(1):1-5. |
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| 作者姓名： | 杜方 |
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| 作者单位： | 四川省地震局,四川 成都 610041 |
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| 摘 要： | 回顾总结了2019年地震活动,从全球到局部,呈现了全球、中国和四川的地震活动概况;分析了全球、中国和四川地震活动的特征;记叙了2019年四川区域内发生的突出地震事件;追踪了2008年汶川8.0级地震以来四川区域内发生的3次7级以上地震的余震活动。结果显示:2019年全球M≥7.0地震活动特征呈现低频次、低强度,主体地区为环太平洋地震带;我国周边未发生M≥7.0地震,表明影响我国地震活动的动力边界地震活动偏弱,我国大陆和邻区地震活动表现出频次低、强度弱的特点,我国大陆地震分布总体显示强度西强东弱,区域上显示M≥5级地震分布于青藏地块、西域地块和华南地块;台湾及其附近海域地震活动频次和强度也偏低;四川区域地震活动强度呈现东强西弱特征,四川区域突出地震事件全部集中在川东南区域;2008年以来,四川区域的汶川8.0级、芦山7.0级和九寨沟7.0级地震的余震持续活动。
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| 关 键 词： | 地震活动 地震事件 余震 |
Summary of Earthquake Activities in 2019 |
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| DU Fang.Summary of Earthquake Activities in 2019[J].Earthquake Research in Sichuan,2020(1):1-5. |
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| Authors: | DU Fang |
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| Institution: | (Sichuan Earthquake Agency, Sichuan Chengdu 610041, China) |
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| Abstract: | This article reviews and summarizes the earthquake activities in 2019,from global to local,presents an overview of earthquake activities in the world,China,and Sichuan.Analyzes the characteristics of earthquake activities in the world,China,and Sichuan。And describes the salient events that occurred earthquake events in Sichuan in 2019.Tracked the aftershock activity of three M≥7 earthquakes in Sichuan since the 2008 Wenchuan 8.0 earthquake.The results show that the characteristics of global M≥7.0 earthquake activity in 2019 show low frequency and low intensity.And the main area is the Pacific earthquake zone.No M≥7.0 earthquake occurred in the periphery of China.Indicate that the dynamic boundary seismic activity affecting seismic activity in China is weak.Seismic activity on the mainland and adjacent areas shows low frequency and weak intensity.The earthquake distribution in China's mainland generally shows that the intensity is strong in the west and weak in the east.And the area shows that M≥5 earthquakes are distributed in the Qinghai-Tibet block,the western block and the southern China block.The frequency and intensity of earthquake activity in Taiwan and its surrounding waters are also low.The intensity of earthquake activity in the Sichuan region is characterized by strong east and weak west.Significant events in the Sichuan region are concentrated in the southeastern Sichuan region.Since 2008,the aftershocks of the M8.0 Wenchuan earthquake,the M7.0 Lushan earthquake and the M7.0 Jiuzhaigou earthquake in Sichuan region continued to be active. |
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| Keywords: | seismic activity earthquake events aftershocks |
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