Study Of The Seismicity Of Mabian-Daguan Seismic Zone

Mabian-Daguan Seismic zone is located at the junction of Sichuan-Yunnan region (27-30°N,102.8-104.8°E), Tibet Plateau by lateral impact extrusion, complex geological structure. Where in the edge of Mabian-Yanjin zone is the main construction area. Historically, Mabian-Daguan Seismic zone of frequent earthquakes recorded only data records since the early 20th century, more complete, this region 57 times more than five destructive earthquakes occurred. August 3,2014 Ludian earthquake occurred 6.5 earthquake also occurred in this belt. Study Mabian-Daguan Seismic zone with seismic activity features for seismic explore the causes and patterns of earthquake prediction and prevention is important.Earthquake catalog data is the basis for the study of seismic activity, its integrity is a key factor in seismic activity results of reliability. By collecting information on Mabian-Daguan Seismic catalog data area with the improvement of national monitoring levels can be monitored to the full magnitude decreased. Since 1982 in the region is greater than 2.0 ML earthquake recorded substantially complete.Mabian-Daguan Seismic zone with obvious mark earthquake active period of calm, the strong earthquake occurred about four years, and middle-strong earthquakes occurred in the earthquake-prone universal. In 2012 Yiliang 5.7 and 5.6 pairs of earthquake and the 2014 earthquake in Ludian 6.5 marks Mabian-Daguan Seismic zone in the seismically active period, The release of the active energy and energy active period in the history of relatively still has gap, which means that in the coming period, the Mabian-Daguan Seismic zone is still likely to occur strong earthquake, you need to pay close attention.By the calculation of seismic activity parameters found in the study Mabian-Yanjin fault zone in the middle of the west side (near Suijiang) and the south side(near Yanjin), there are two obvious low b value anomaly area, in stress accumulation phase. For some time earthquake may occur, it should draw attention..Through the study of 2012 Yunnan earthquakes and the 2014 earthquake in Ludian before we can see, they have low b value, low a value, as well as the expectations of a large magnitude, the fault activities in these two regions are locking in a high stress state.