1999•Northwestern Seismological JournalRequires access
PRECURSORY ANOMALIES AND A TEST ON ABILITY FOR REFLECTING EARTHQUAKE OF OBSERVATION DATA OF SOME STATIONS IN PINGLIANG AREA,GANSU PROVINCE BEFORE THE 1998 HAIYUAN M S4.7 EARTHQUAKE
Sun Shi
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Abstract
Anomalies of radon content in groundwater,ground water level and ground resistivity observed by some stations in Pingliang area,Gansu province before the Haiyuan M S4.7 earthquake on July 29,1998 is analysed and prediction to the M S4.7 earthquake is introduced.The results show it is better that some observation items of Pingliang area reflect earthquakes with magnitude of 5 or so in Pingliang area and Xiji Haiyuan Guyuan area and M S≥6 earthquakes in northern segment of NS seismic belt.