network presentation tomoki watanabe ifree/donet-maritec/jamstec marine works japan co. tomoki...

Download Network Presentation Tomoki Watanabe IFREE/DONET-MARITEC/JAMSTEC Marine Works Japan Co. Tomoki Watanabe IFREE/DONET-MARITEC/JAMSTEC Marine Works Japan

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  • Slide 1
  • Network Presentation Tomoki Watanabe IFREE/DONET-MARITEC/JAMSTEC Marine Works Japan Co. Tomoki Watanabe IFREE/DONET-MARITEC/JAMSTEC Marine Works Japan Co. My first work with OBS, taken in 1990 (Reykjanes Ridge experiment)
  • Slide 2
  • JAMSTEC Network Presentation G Tsuboi-san already presented. G We have . G Broadband seismic network (Pacific 21) G Cabled Observatories Muroto Hatsushima Kushiro-Tokachi G Tsuboi-san already presented. G We have . G Broadband seismic network (Pacific 21) G Cabled Observatories Muroto Hatsushima Kushiro-Tokachi
  • Slide 3
  • Pacific 21 Network and DMC network design STS-2: HBR, MCSJ STS-1: KMS, TSK, INU, TJN, OGS, BAG, PALU, JAY, PSI, PMG CMG-3T: KSI
  • Slide 4
  • Seiscomp Test. STS-1 +Q330HR Q330HR Network geometry Waveform of the 2007 Sumatra earthquake (Mw 8.2, sensor:STS-1) Snapshot of the SeisComp monitor (seisgram)
  • Slide 5
  • JAMSTEC Network Presentation G Tsuboi-san already presented. G We have . G Broadband seismic network (Pacific 21) G Cabled Observatories Muroto Hatsushima Kushiro-Tokachi G Tsuboi-san already presented. G We have . G Broadband seismic network (Pacific 21) G Cabled Observatories Muroto Hatsushima Kushiro-Tokachi
  • Slide 6
  • JAMSTEC Cabled Observatories Muroto Observatory Hatsushima Observatory Kushiro Observatory
  • Slide 7
  • DONET --ocean bottom network coming near future-- Development of Dense Oceanfloor Network System for Earthquakes and Tsunamis (DONET) Sensor spacing: ~20km
  • Slide 8
  • Network plan for DONET G 5 nodes & 20 station G Realtime monitoring
  • Slide 9
  • Topics on Kushiro observation
  • Slide 10
  • 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 -
  • Slide 11
  • Stations and structure used in hypocenter determination Data exchange in Japan (with other institutes): -2006.12.19 via Satellite & IP-VPN 2006.12.19 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
  • Slide 12
  • Kushiro Observatory - Earthquake Detectability - Comparison of magnitudes With 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.
  • Slide 13
  • Topics on Kushiro observatory Seismicity 2 gaps was recognized off SE Hokkaido. Seismicity 2 gaps was recognized off SE Hokkaido.
  • Slide 14
  • 2003 Tokachi-oki earthquake(M8.0) Waveform of the Mainshock At the nearest seismometer (OBS) Aftershock distribution
  • Slide 15
  • Data available via G Pacific 21:(ninja, full SEED) http://www.jamstec.go.jp/pacific21/ G Ocean Bottom Cable Data Center: (win format) http://www.jamstec.go.jp/scdc/ File format converter (win2db) : http://www.iris.edu/manuals/#11 Or SeisComp Package (ver. 2.5, for online data) G Pacific 21:(ninja, full SEED) http://www.jamstec.go.jp/pacific21/ G Ocean Bottom Cable Data Center: (win format) http://www.jamstec.go.jp/scdc/ File format converter (win2db) : http://www.iris.edu/manuals/#11 Or SeisComp Package (ver. 2.5, for online data)
  • Slide 16
  • And one more content on the seafloor when an earthquake occurs