OBSERVATION OF SEISMIC INTENSITY AND STRONG GROUND MOTION BY JAPAN METEOROLOGICAL AGENCY AND LOCAL GOVERMENTS IN JAPAN

Abstract

The seismic intensity-meters over 3400 have been deployed by Japan Meteorological Agency (JMA) and local governments of all over Japan. These intensity data are utilized for quick earthquake information through all broadcasting in Japan. Most of seismic intensity-meters have capability to record and preserve the strong ground motion (acceleration). The high-level accelerations that had never observed before the installation were recently observed due to very dense sites.