Abstract In order to meet the national intelligent development needs of coal mines, construct smart improve their safety production levels and finally realize vision flexible manpower line unmanned development, application 5G communication technology in seismographs for underground mines was discussed this study based on history advantages technology. Next, main scenarios were explored by combi...

The pattern of energy release during the Imperial Valley, California, earthquake of 1940 is studied by analyzing the El Centro strong motion seismograph record and records from the Tinemaha seismograph station, 546 km from the epicenter. The earthquake was a multiple event sequence with at least 4 events recorded at El Centro in the first 25 seconds, followed by 9 events recorded in the next 5 ...