Analysis of the local lithospheric magnetic activity before and after Panzhihua M w = 6.0 earthquake (30 August 2008, China)

摘要: Abstract. Lithospheric ultra low frequency (ULF) magnetic activity is recently considered as a very promising candidate for application to short-time earthquake forecasting. However the intensity of ULF lithospheric field weak and often masked by much stronger ionospheric magnetospheric signals. The study pre-earthquake before occurrence strong hard problem which consists identification localization signal sources in hazardous areas Earth's crust. For separation such sources, we used new polarization ellipse technique (Dudkin et al., 2010) process data acquired from fluxgate magnetometers installed Sichuan province, China. region strongest seismic on territory During last century, about 40 earthquakes with magnitude M ≥ 6.5 happened here close proximity heavy populated zones. Panzhihua w = 6.0 southern part province 30 August 2008 at 8:30:52 UT. hypocentre was located 10 km depth. period 30–31 – beginning September 2008, many clustered aftershocks magnitudes up 5.6 occurred near epicentre. three (belonged China magnetometer network placed distance 10–55 main shock epicenter) have been processed. between range 40–65 km. analysis local during January–December possible source structure presented this paper.