Strong earthquake activity all over the world and strong-moderate earthquake activity within and near China (April,2004～May,2004)

Illustration All the data in this catalog are chosen from the "Preliminary Seismological Report of Chinese Seismic Stations"(Its abbreviation is "Monthly Report"). The catalog includes the events of M≥4.7 in and near China and M≥6 all over the world. The "Monthly Report" is monthly compiled by the Ninth Section of Institute of Geophysics, CSB. ……