SYSTEM AIMING AT COLLECTION OF EARTHQUAKE DATA ON SEA BOTTOM EARTH LAYER BY USING SEA-BOTTOM-INSTALLED EARTHQUAKE DATA COLLECTING STATION

摘要

PROBLEM TO BE SOLVED: To provide a system aiming at collection of earthquake data on sea bottom earth layers by using sea-bottom-installed earthquake data collecting stations.;SOLUTION: This system comprises the sea-bottom-installed earthquake data collecting stations (DSAU) combining a streamlined boom suitable to be stuck into a sea bottom and suitable for joining a number of earthquake receivers to underground layers and a hermetic body for electronic data collection/communication modules. The station is thrown into the sea and reaches the sea bottom by the action of gravitation. A number of relay buoys (RCB) are placed in predetermined positions on the sea. They each have a GPS positioning module wireless-linked to a central terminal (CCRU) located on shipboard (for example) and a module for performing acoustic communication with the collecting station. These modules are used to measure the position of the station relative to the relay buoys and further used to exchange control data and earthquake data.;COPYRIGHT: (C)2003,JPO