Abstract
An experimental production of the three stage seismic intensity meter is demonstrated. The system consists of general JMA seismic intensity meter and EEW receiving terminal. It broadcasts three kinds of seismic intensities, 1) seismic intensity estimated from initial stage of observed P wave on site (P-wave sensor), 2) seismic intensity estimated from source information broadcasted by Earthquake Early Warning (EEW) network, 3) seismic intensity calculated from observed strong ground motion at the site. Installing the three stage seismic intensity meters, 1) post facto broadcasting area of EEW network is expected to be trimmed, 2) people around the seismic meter can be ready for strong ground shaking beforehand, 3) estimated seismic intensity is confirmed with observed intensity.
