We usually use UTC Datetime to existing the origin time of the earthquake. Seismic time-sequence facts like digital seismograms also use UTC Datetime to existing time of each sample.??? ????? ??? ??????. ????? ?? ???? ??? ?????? ??? ?? ??????? ????? ??? ??? ????? ???? ?? ???? ??????? ?????? ??????? ????????.In 2019, Stephen made available supporter