EARTHQUAKE EARLY WARNING SYSTEM

PROBLEM TO BE SOLVED: To provide an earthquake early warning system for issuing a warning earlier than before, minimizing earthquake damages even when there is no time to lose with the existing emergency earthquake report, and it is difficult to take effective measures, in the case of a direct-hit e...

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Bibliographic Details
Main Authors KANDA KATSUHISA, ABE MASAFUMI, SATAKE AKIHIRO, MIYAMURA MASAMITSU, NASU TADASHI
Format Patent
LanguageEnglish
Published 12.02.2009
Subjects
ALARM SYSTEMS
DETECTING MASSES OR OBJECTS
GEOPHYSICS
GRAVITATIONAL MEASUREMENTS
MEASURING
ORDER TELEGRAPHS
PHYSICS
SIGNALLING
SIGNALLING OR CALLING SYSTEMS
TESTING
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Summary:PROBLEM TO BE SOLVED: To provide an earthquake early warning system for issuing a warning earlier than before, minimizing earthquake damages even when there is no time to lose with the existing emergency earthquake report, and it is difficult to take effective measures, in the case of a direct-hit earthquake or the like. SOLUTION: Local seismometers are installed on points or areas to be warned. The local seismometers are disposed in a triangle shape with certain distance. The intensity of an S wave is estimated based on a maximum value of the velocity of a P wave in the vertical direction in predetermined several seconds from the start of detection of the P wave detected by the local seismometers. The warning is issued when the intensity of the estimated S wave exceeds a set level. Also, a receiver for an emergency earthquake report of Japan Meteorological Agency is provided. By inputting information into a decision processing circuit, it is possible to use an emergency earthquake report data when a seismic center is far. COPYRIGHT: (C)2009,JPO&INPIT
Bibliography:Application Number: JP20070196995