The basis to predict earthquakes by the double magnetic storm time method is that the crustal expansion and contraction caused by the migration of strain energy present a cycle with a double time relation.The Tangshan MS7.8 earthquake was the strongest one in 1970s in our country,it had a relation to four groups of magnetic storm energy based on the double magnetic storm time method.Every group of magnetic storm was headed or followed by earthquakes.When the residual energy accumulating after these earthquakes,the crust expanded and contracted,the geomagnetic field was affected and the magnetic storm formed.So the magnetic storm has a relation to variation of earthquake energy and earthquakes can be predicted by the double magnetic storm time method.
参考文献
相似文献
引证文献
引用本文
张铁铮.磁暴二倍法预报唐山7.8级地震[J].地震工程学报,1998,20(2):29-35. ZHANG Tiezheng. DOUBLE MAGNETIC STORM TIME METHOD TO PREDICT THE TANGSHAN MS7.8 EARTHQUAKE IN 1976[J]. China Earthquake Engineering Journal,1998,20(2):29-35.