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107

Bull. Earthq. Res. Inst.

Univ. Tokyo

Vol. pp.

* e-mail : nakagawa@eri.u-tokyo.ac.jp

Earthquake Research Institute, the University of Tokyo

We launched the Special Project for Earthquake Disaster Mitigation in the Metropolitan Tokyo

area to obtain high-resolution images of three-dimensional seismic wave velocity and attenuation

structures. The core item of this project is a dense seismic array called MeSO-net for making

observations in the metropolitan area. MeSO-net consists of seismic stations, from which data

are continuously collected at the Data Center at ERI. At the Sub-Center at NIED, data are backed

up and integrated with Hi-net data. Seismic data with a sampling rate of Hz are transmitted to

the Data Center using ACT protocol. Data from all stations are received at the Data Center at ERI.

After checking the quality (including lost packets) of data received, data are automatically proc-

essed and archived using the WIN system. This observational network and the Data Center are

equipped with several new functions for reliable data transmission and ease of maintenance.

: Metropolitan Seismic Observation network (MeSO-net), Data Center, WIN system

MeSO-net

MeSO-net

; ;

MeSO-net Hz

Hi-net Obara

,

Hz MeSO-net CVCF

Hi-net

*

Shigeki Nakagawa*, Hiroshi Tsuruoka, Yuko Kawakita, Shin’ichi Sakai and Naoshi Hirata

et

al.,

Abstract

Key words

Buildup and Operation of MeSO-net Data Center

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108

Fig. . Schematic illustration of flowchart of data transmission acquired by MeSO-net.

Table . Specifications of servers in Data Center.

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