jgg     2007 27 (6):  91-95    ISSN: 0412-1961  CN: 21-1139/TG ＲＥＣＥＮＴＦＯＣＡＬＭＥＣＨＡＮＩＳＭ ＩＮＸＩＮＧＴＡＩＲＥＧＩＯＮ ＺｈａｎｇＨｏｎｇｚｈｉ１;ＤｉａｏＧｕｉｌｉｎｇ２;ＺｈａｏＹｉｎｇｐｉｎｇ２;ＷａｎｇＣｈｅｎｇｌｉａｎｇ３;ＺｈａｎｇＸｉａｏ４;ＬｉＧｕａｎｇ４;ＭａＬｉｊｕｎ２ １）ＩｎｓｔｉｔｕｔｅｏｆＧｅｏｐｈｙｓｉｃｓ，ＣＥＡ，Ｂｅｉｊｉｎｇ　１０００８１ ２）ＥａｒｔｈｑｕａｋｅＡｄｍｉｎｉｓｔｒａｔｉｏｎｏｆＨｅｂｅｉＰｒｏｖｉｎｃｅ，Ｓｈｉｊｉａｚｈｕａｎｇ　０５００２１ ３）ＥａｒｔｈｑｕａｋｅＡｄｍｉｎｉｓｔｒａｔｉｏｎｏｆＨａｎｄａｎＣｉｔｙ，Ｈａｎｄａｎ　０５６０１４ ４）ＥａｒｔｈｑｕａｋｅＡｄｍｉｎｉｓｔｒａｔｉｏｎｏｆＴａｎｇｓｈａｎＣｉｔｙ，Ｔａｎｇｓｈａｎ ０６３０００ Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null