SYSTEM AND APPARATUS FOR DETECTING GENERATION AND MAGNITUDE OF GREAT EARTHQUAKE BY MEASURING TO MONITOR SOUND WAVE PROPAGATING IN SEAWATER AT 1,500 M/SEC AS HYDROACOUSTIC CAUSED BY INITIAL DESTRUCTION, FOR ACQUISITION OF PRELIMINARY CRYSTAL DEFORMATION PHENOMENON AT SEABOTTOM IN SYNCHRONISM WITH SEISMIC ACTIVITY FROM PRELIMINARY TREMOR UP TO OVERALL DISASTER AT SEVERAL-DAY'S OR SEVERAL-MINUTE'S SPAN, TO BROADCAST EARTHQUAKE WARNING AND INFORMATION AS PHYSICALLY IMPOSSIBLE TO EXACTLY ANNOUNCE FORECAST ORIGIN TIME OF EARTHQUAKE GENERATED AT HYPOCENTRAL ZONE OF SEABOTTOM

摘要

PROBLEM TO BE SOLVED: To give an earthquake alarm several days to several minutes before reaching the total breakdown of the earth's crust for drastically reducing disaster by monitoring and observing an underground acoustic wave at a specific speed that is generated at the initial stage of the destruction of the earth's crust where the earthquake does not stop any longer. ;SOLUTION: An earthquake alarm is given automatically by capturing the destructive phenomenon of the initial earth's crust at the seabed that is in one piece with the occurrence of the earthquake several days to several minutes before reaching the total destructive phenomenon of the earth's crust. An electronic wave that is generated as an underwater acoustic wave in the ocean seawater due to a series of small, initial destruction of the earth's crust and is propagated underwater at 1,500 ms is monitored and observed by a plurality of microphone networks under the sea, thus determining the occurrence of a large earthquake and its scale. Connection is made as the microphone network by a seabed cable, and a captive buoy or a buoy that is automatically navigated by an artificial satellite for retaining a fixed point is provided with an underwater microphone and an electronic wave receiver before being placed near the earthquake area. Turning on the automatic activation key of the device is determined by the judgment meeting of an earthquake prediction liaison committee.;COPYRIGHT: (C)1999,JPO