云南宁洱6．4级地震灾区范围的快速判断

Fast Judgment of Disaster Aera of Ning'er M 6.4 Earthquake in Yun'an

采用云南175个历史强震的等震线图、云南数字等震线模型和云南1∶400万活动断裂资料,对常规正圆法灾区范围量化与数字等震线模型灾区范围量化得到的云南宁洱6.4级地震灾区范围进行了对比,分析了地震等震线长轴方向与活动断裂的关系。结果表明,灾害地震的灾区范围用等震线模型来量化比常规用正圆来量化更加符合地震的客观情况。

According to the digital isoseismal map of 175 historical strong earthquakes of Yunnan, digital isoseisms model and 1：400 active fault maps of Yunnan, the damage area based traditional way is compared with the area based the digital isoseisms model and the relationship between the long-axis of digital isoseisms and active fault is analyzed. The results show that it accords with the objective condition of earthquake when we adopt the digital isoseisms model instead of the traditional way of circular analysis.