Network PresentationNetwork Presentation

Tomoki WatanabeIFREE/DONET-MARITEC/JAMSTEC

Marine Works Japan Co.

Tomoki WatanabeIFREE/DONET-MARITEC/JAMSTEC

Marine Works Japan Co.

My first work with OBS, taken in 1990(Reykjanes Ridge experiment)

JAMSTEC Network Presentation

JAMSTEC Network Presentation

Tsuboi-san already presented.We have ….

Broadband seismic network (Pacific 21)Cabled Observatories

MurotoHatsushimaKushiro-Tokachi

Tsuboi-san already presented.We have ….

Broadband seismic network (Pacific 21)Cabled Observatories

MurotoHatsushimaKushiro-Tokachi

Pacific 21 Network and DMC network design

Pacific 21 Network and DMC network design

STS-2: HBR, MCSJSTS-1: KMS, TSK, INU, TJN, OGS, BAG, PALU, JAY, PSI, PMG CMG-3T: KSI

Seiscomp Test….Seiscomp Test….

STS-1+Q330HRQ330HR

Networkgeometry

Waveform of　 the 2007 Sumatra earthquake (Mw 8.2, sensor:STS-1)

Snapshot of the SeisComp monitor (seisgram)

JAMSTEC Network Presentation

JAMSTEC Network Presentation

Tsuboi-san already presented.We have ….

Broadband seismic network (Pacific 21)Cabled Observatories

MurotoHatsushimaKushiro-Tokachi

Tsuboi-san already presented.We have ….

Broadband seismic network (Pacific 21)Cabled Observatories

MurotoHatsushimaKushiro-Tokachi

JAMSTEC Cabled Observatories

JAMSTEC Cabled Observatories

Muroto ObservatoryHatsushima Observatory

KushiroObservatory

DONET--ocean bottom network coming near future--

DONET--ocean bottom network coming near future--

Development of Dense Oceanfloor Network System for Earthquakes and Tsunamis (DONET)Sensor spacing: ~20km

Network plan for DONETNetwork plan for DONET

5 nodes & 20 station Realtime monitoring 5 nodes & 20 station Realtime monitoring

Topics on Kushiro observation

Topics on Kushiro observation

Kushiro Cabled Observatory

Kushiro Cabled Observatory

- Cable Length: c.a. 240km-3 Seismometers (accelerometer)Japan Aviation Electronics Industory(JAE) 　 JAE5-III- 2 Tsunami gauges-1 cable-end station (ADCP, CTD, camera,Hydrophone, sub-sea thermometer)

Observation: 1999. July -

Stations and structure used

in hypocenter determination

Stations and structure used

in hypocenter determination

Data exchange in Japan (with other institutes):-2006.12.19 via Satellite & IP-VPN2006.12.19 – IPv6 multicast & IP-VPN

Data exchange in Japan (with other institutes):-2006.12.19 via Satellite & IP-VPN2006.12.19 – IPv6 multicast & IP-VPN

Network geometry of Seismological Data exchange in Japan (connected by IP-VPN or Frame Relay)

Cumulative number of processed earthquakes

Station Distribution

Velocity Structure

Kushiro Observatory - Earthquake Detectability -

Kushiro Observatory - Earthquake Detectability -

Comparison of magnitudesWith JMA magnitude

Comparison of Detectabillity before/after OBS installation

Period: 2001. June-2002 Dec.

M(JMA)=0.663M(ISV)+1.132 After installation, minimum magnitude detectable Was improved to ~ M2.

Topics on Kushiro observatory

Topics on Kushiro observatory

Seismicity – 2 gaps was recognizedoff SE Hokkaido….Seismicity – 2 gaps was recognizedoff SE Hokkaido….

2003 Tokachi-oki earthquake(M8.0)2003 Tokachi-oki earthquake(M8.0)

Waveform of the MainshockAt the nearest seismometer (OBS)

Aftershock distribution

Data – available via…Data – available via…

Pacific 21:(ninja, full SEED)http://www.jamstec.go.jp/pacific21/ Ocean Bottom Cable Data Center: (win format)http://www.jamstec.go.jp/scdc/

File format converter (win2db) :http://www.iris.edu/manuals/#11Or SeisComp Package (ver. 2.5, for online data)

Pacific 21:(ninja, full SEED)http://www.jamstec.go.jp/pacific21/ Ocean Bottom Cable Data Center: (win format)http://www.jamstec.go.jp/scdc/

File format converter (win2db) :http://www.iris.edu/manuals/#11Or SeisComp Package (ver. 2.5, for online data)

And one more contenton the seafloor

when an earthquake occurs…

And one more contenton the seafloor

when an earthquake occurs…