Historical data regarding Zhang Hengs seismoscope is not singular proof. Actually,the four earliest historical documents,i. e.,Continuation of Historiography of Han Dynasty, Historiography of the Late
Characteristic period is an important parameter of the seismic design response spectrum.There is important theoretical significance and engineering application
By using an offshore large volume air-gun seismic source, onshore seismic stations( including mobile stations and permanent stations) and ocean bottom seismomet