【摘要】 2008年5月27日宁强5.7级地震是陕西省近304年以来最大的一次地震。临震前7天安康、宝鸡、宁陕和西安台的垂直摆、水管仪和伸缩仪资料出现了短临异常现象,异常形态趋势转折,持续时间2～7天。异常区域在两个纬向断裂带之间,即略阳-洋县、竹山断裂以北,渭河断裂以南,震中距230～340km。更多还原

【Abstract】 Ningqiang MS5.7 Earthquake on May 27,2008,was the largest one in nearly 304 years in Shaanxi provience.Seven days before the earthquake,the data of vertical pendulum,plumbing instrument and extensometer all showed short-term anomalies at Ankang,Baoji,Ningshan and Xi′an stations.The trend of abnormal shape turned point in 2~7 days.Abnormal region lies between two fault belts,which are Lueyang-Yangxian fault and Zhushan fault in south,and Weihe fault in north.The epicenter distances 230~340 km.更多还原