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Bull. Earthq. Res. Inst.
Univ. Tokyo
Vol. pp.
* e-mail : [email protected]
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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Table . (continued)
Table Mbps
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ISDN
kbps
Fig.
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A
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SD net
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change from green to red through yellow and pink as the degree of the problem is increased.
Fig. . Screen shot of the information of Management Information Base (MIB) data in real-time.
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Obara, K., K. Kasahara, S. Hori and Y. Okada, , A densely
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distributed high-sensitivity seismograph network in
Japan : Hi-net by National Research Institute for Earth
Science and Disaster Prevention,
, -doi : . / . .
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Hirata, N., H. Sato, K. Koketsu, H. Hagiwara, F. Wu, D.
Okaya, T. Iwasaki, K. Kasahara, , Mega-thrust and .
Intra-slab Earthquakes Beneath Tokyo Metropolitan
Area, , Fall Meet. Suppl., Ab-
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