Hongo2296-2, Kamitakara, Takayama, Gifu 506-1317 JAPAN
TEL: +81-578-86-2350
FAX: +81-578-86-2858
This observatory was established in 1965 to promote
observations for crustal movements and seismic
activities. This observatory is located in the north-western
Chubu region, and close to the Atotsugawa
fault, one of the major active faults in Japan. It has a
network of 4 sub-stations for crustal movements and 7
seismographic stations, to investigate the relation
between crustal movements and seismicity. Seismic
and geophysical data recorded at the sub-stations are
telemetered to the Observatory and also to the
Research Center for Earthquake Prediction.
The observations now being made are:
Continuous observations of crustal movements:
Secular and tidal crustal strains and tilts are
routinely observed at the main observation station
with 3 quartz-tube strainmeters, 2 water tube and 2
horizontal pendulum tiltmeters and at 3 other
stations.
Seismic observations: Seismicity in the northern
Hida, Toyama Bay and Noto Peninsula regions,
particularly along the Atotsugawa fault and the Hida
mountain range, is constantly monitored at 7
stations with high sensitive short-period seismometers,
together with 3 other stations linked with
the Takayama Seismological Observatory, Nagoya
University. In addition, temporary stations have
been set up in the Noto Peninsula and near
Yakedake volcano to monitor the recent high level
of earthquake activity. There are also 3 long-period,
3 strain and 3 broadband digital seismographs
at the main station to record teleseismic
body and surface waves.
Geomagnetic and geoelectric observations:
Geomagnetic observations are made by a protonmagnetometer
at two sites, and geoelectric self-potential
are also monitored at three sites near the
Atotsugawa fault.
