Antelope as a Platform for Data Exchange
Nozomu Takeuchi
(University of Tokyo)
Brief introduction for seismic observationsconducted by Japanese institutes.
Outline
Introduction of our project on data exchange
- Which kinds of data are available?
1.
2.
- Who are we?
High Sensitivity Sensors Broadband Sensors
Domestic Station Distributions in Japan
Colors denote the institutes managing that station.
Domestic Seismic Observation Systembefore Kobe Earthquake
The Ministry ofEducation
Universities
Networksfor research
The PrimeMinister’s Office
Networks for disaster management
NIED
The Ministry ofTransport
JMA
Networks formonitoring
(National Research Institute for Earth Science and Disaster Prevention)
(Japanese Meteoro- logical Agency)
after Kobe Earthquake
Headquarters of Earthquake Res. Promotion
Universities NIED JMA Other institutions
data exchange
Domestic Seismic Observation System
Data Exchange Among Institutions
(Unfortunately, we are not using Antelope here.)
waveform display,picking the arrival times,hypocenter determinations, and others
GUI for
Grid MT
real time determination of moment tensors
http://wwwic.eri.u-tokyo.ac.jp/GRID_MT
automatic tremor monitoring system
ATMOS
http://tremor.geol.sci.hiroshima-u.ac.jp/ (in Japanese)
Availability of Domestic Data (slightly oversimplified)
High SensitivitySensors
BroadbandSensors
Strong MotionSensors
Universities J-Array 237 50
208 20
SK-net etc. 147
JMA 584
NIED Hi-net 790
F-net 73
K-net 1735
Kik-net 691
Others 33 2 1369
J-Array http://jarray.eri.u-tokyo.ac.jpHi-net http://www.hinet.bosai.go.jp (Japanese)F-net http://www.fnet.go.jpK-net http://www.k-net.bosai.go.jpKik-net http://www.kik.bosai.go.jp
(*)
* available upon requests
fundamental earthquakeobservation networks
Fundamental Earthquake Observation Networks
• The necessities are defined by governmental policies. Funding is relatively guaranteed.
• homogeneous station distribution. homogeneous instrumentations.
• high data quality. Well maintained.
Fundamental Earthquake Observation Networks
• All data should be open to public.
Hi-net, Kik-net F-net
borehole observationsvault with 30-50 m depthVBB sensors
International Networks by Japanese Institutions
OHP
SPANETSpecial Coordination Funds for the promotionof Sci. and Tech.
Grand-in-aid for Scientific Research1996-2001
1996-2000
• Constructed by competitive funds.
• Aiming at the Pacific regions.
PSI station (OHP) NRFK station (SPANET)
Network MaintainanceOHP by IFREE/JAMSTEC and ERI/U. TokyoSPANET by NEID
• The Management expense grants are used for operations. • Some stations have a vault but some do not.
• VBB sensors for some stations but BB sensors for another stations.
Available International Data• All continuous data are open to the public.
• All data are provided in SEED format.
OHP http://ohpdmc.eri.u-tokyo.ac.jpSPANET http://www.isn.bosai.go.jp
Stations of GlobalNetworks
• currently available stations
● IRIS GSN, GEOSCOPE● OHP
Stations of GlobalNetworks and VariousNational Networks
● IRIS GSN, GEOSCOPE● OHP, F-net, NECESSArray● national network
Wang and Niu (2010)
• currently available stations
• open to the public via the IRIS DMC
Improvements in the Resolution by Using Azimuthal Dependency
ScS reflection points for SE-NW paths
ScS reflection points for N-S paths
Improvements in the Resolution by Using Azimuthal Dependency
Improvements in the Resolution by Using Azimuthal Dependency
ScS-S residuals for N-S paths
Improvements in the Resolution by Using Azimuthal Dependency
ScS-S residuals for N-S paths
OHP Data Collection System
OHP Data Exchange System
OHP Data Exchange System (future plan)