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Geospatial Information Authority of Japan
The , or GSI, is the national institution responsible for surveying and mapping the national land of Japan. The former name of the organization, from 1949 until March 2010 was Geographical Survey Institute.〔(New English Appellation of the Geographical Survey Institute )〕 It is an organization attached to the Ministry of Land, Infrastructure, Transport and Tourism. Its main offices are situated in Tsukuba City of Ibaraki Prefecture.
It also runs a museum, situated in Tsukuba, the Science Museum of Map and Survey.
==Earthquake Precursor Prediction Research==
Stationary MT monitoring systems have been installed in Japan since April 1996, providing a continuous recording of MT signals at the Mizusawa Geodetic Observatory and the Esashi Station of the GSI. These stations measure fluctuations in the earth's electromagnetic field that correspond with seismic activity. The raw geophysical time-series data from these monitoring stations is freely available to the scientific community, enabling further study of the interaction between EM events and earthquake activity. The MT time series data from the GSIJ earthquake monitoring stations is available online at http://vldb.gsi.go.jp/sokuchi/geomag/menu_03/mt_data-e.html
The Authority is represented on the national Coordinating Committee for Earthquake Prediction.〔(Organizations with ties to CCEP ) CCEP, accessed 2011-03-19〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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