2006年文县5.0级地震序列特征和震前M_L3.0地震活动特征

Characteristic of Wenxian Ms5.0 Earthquake Sequence in 2006 and Seismic Activity with ML≥3.0 before the Main Shock

摘要:

2006年6月21日甘肃文县5.0级地震的地震序列余震发育,判定为主震-余震型。之前该地区100多年中强地震平静;震前一年ML3.0以上地震频次增高、地震连发;震前一月ML3.0地震活动平静。没有孕震空区和条带存在。

Abstract:

In the earthquake sequence of Wenxian Ms5. 0 event on Jun. 21,2006, in Gansu province, the aftershocks were rich, so the type of shock is mainshock-aftershock sequence. No moderate or strong earthquakes occurred in 100 years before the event, but ML ≥3.0 events had increased and occurred one after another with groups in one year before the mainshock. Until one month before, the seismic activity went quiet. No seismic gap and belt is formed.