2013年我国地震灾害时空特征与灾害损失分析

发布时间：2018-10-31 10:34

【摘要】：基于对2013年我国地震发生频次及受灾情况的统计,系统分析了地震灾害发生的时空分布特征,并探讨了各省区地震释放能量与地震灾害损失的差异性。结果表明:2013年我国大陆地区中强震异常活跃,特别是芦山地震造成了巨大的人员伤亡与经济损失。4.0级以上地震频次年内分布主要受较强余震次数的影响,而年内地震释放能量分布受控于强震。2013年我国地震发生频次在空间上呈现明显的地域分异特征,整体上呈现西密东疏的特点,特别是南北地震带上强震活跃,其中四川、云南及其交界地带是地震发生频次最多的区域。大多数省区的震级分布特征均为弱震数量多,强震数量少。地震造成的经济损失不仅与地震所释放的能量有关,也与区域经济发展水平有明显关系。四川、甘肃是受灾最严重的省区,人员伤亡与经济损失巨大,云南、吉林由于强震多,经济损失也较大。
[Abstract]:Based on the statistics of earthquake occurrence frequency and disaster situation in China in 2013, the space-time distribution characteristics of earthquake disaster are analyzed systematically, and the difference between the energy released by earthquake and the loss of earthquake disaster in each province is discussed. The results show that the moderate and strong earthquakes were very active in China in 2013, especially the Lushan earthquake caused huge casualties and economic losses. The frequency distribution of earthquakes with magnitude 4.0 or above was mainly affected by the number of strong aftershocks in the year. During the year, the distribution of energy released by earthquakes was controlled by strong earthquakes. The frequency of earthquakes in China in 2013 showed a distinct regional differentiation in space, and an overall characteristic of thinning in the eastern and southern parts of the country, especially the active strong earthquakes in the north-south seismic belt, among which Sichuan was active. Yunnan and its borderland are the areas where earthquakes occur most frequently. The magnitude distribution of most provinces is characterized by large number of weak earthquakes and small number of strong earthquakes. The economic loss caused by the earthquake is not only related to the energy released by the earthquake, but also to the level of regional economic development. Sichuan and Gansu are the worst-hit provinces with huge casualties and economic losses.
【作者单位】：西北农林科技大学水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室;中国科学院水利部水土保持研究所;
【分类号】：P315.9

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