Sensor for gravitational field and its application to measures against large earthquake disasters

Author

Chiba, Jiro

Author_Institution

Graduate Sch. of Eng., Tohoku Univ., Sendai, Japan

fYear

1994

fDate

12-14 Oct 1994

Firstpage

134

Lastpage

136

Abstract

A gravitational field sensor is described as well as its application to provide warnings so that measures can be taken to mitigate the effects large earthquakes. One of the most promising sensors uses the principle of Michelson interferometry. Assuming a great earthquake (magnitude M=7) where the epicentral distance to a city is long, for instance, ~100 km the sensor will respond to the turbulent gravitational field with about 20 dB sensitivity 7 seconds before the seismic wave (primary wave) arrival. Even in a short period such as this it will be possible to take some safety measures like turning off the gas and nuclear reactors, bringing trains to a sudden stop, etc

Keywords

disasters; earthquakes; emergency services; geodesy; geophysical techniques; gravimeters; light interferometry; seismology; Michelson interferometry; disaster prevention; geophysical measurement technique; gravimeter; gravitational field sensor; great earthquake; large earthquake disaster; mitigate; nuclear reactor; safety measure; seismology; train; very short term prediction; warning; Geodesy; Geophysical measurements; Gravity measurement; Optical interferometry; Seismology;

fLanguage

English

Publisher

ieee

Conference_Titel

Security Technology, 1994. Proceedings. Institute of Electrical and Electronics Engineers 28th Annual 1994 International Carnahan Conference on

Conference_Location

Albuquerque, NM

Print_ISBN

0-7803-1479-4

Type

conf

DOI

10.1109/CCST.1994.363779

Filename

363779