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Seismic Networks Operated by Central Weather Bureau in Taiwan Ta-Yi Chen Central Weather Bureau

Seismic Networks Operated by Central Weather Bureau in Taiwan Ta-Yi Chen Central Weather Bureau. Outline. Seismicity in Taiwan CWB Seismic Networks Integrated Seismic Network System Architecture Data Format. Seismicity in Taiwan. Current Seismic Networks （ since 1991 ）.

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Seismic Networks Operated by Central Weather Bureau in Taiwan Ta-Yi Chen Central Weather Bureau

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  1. Seismic Networks Operated by Central Weather Bureau in Taiwan Ta-Yi Chen Central Weather Bureau

  2. Outline • Seismicity in Taiwan • CWB Seismic Networks • Integrated Seismic Network • System Architecture • Data Format

  3. Seismicity in Taiwan

  4. Current Seismic Networks（since 1991） • Strong-MotionSeismic Network (110) • Dynamic Range : 16bit • Sampling Rate : 50sps • Type of Seismometer: Smart24a • Type of telemetry: Telephone Line • Time mark is given in Central Station. • Short-Period Seismic Network (71) • Dynamic Range : 12bit • Sampling Rate : 100sps • Type of Seismometer: S13 • Type of telemetry : Telephone Line • Time mark is given in Central Station. S13 in Bore-Hole S13 on Surface Smart24a on Surface

  5. Updated Seismic Network • Integrate short-period and strong-motion data streams into 1 recorder (Smart24a). • Dynamic Range : 24bit • Sampling Rate : 100sps • Type of Telemetry : Frame Relay, ADSL Time mark is given on site by GPS. 68 station done

  6. Broad-Band Seismic Network • Broad-Band Seismic Network (33) • Dynamic Range : 24bit • Sampling Rate : 100sps • Type of Seismometer: CMG-3ESP, • CMG-40TD • Type of Digitizer: DM24 • Type of telemetry: Frame Relay • Time mark is given on site by GPS. DM24 CMG-3ESP

  7. Bore-Hole Seismic Network • Dynamic Range : 24bit • Sampling Rate : 100sps • Type of Telemetry : Frame Relay • Type of Digitizer: Smart24r Time mark is given on site by GPS. • Each site is equipped with 3 different instruments • ~300 m in depth 17 stations Have Been Done Done Phase II Phase III 70 stations in Final Step

  8. Cable Ocean Bottom Seismic Network • Dynamic Range : 24bit • Sampling Rate : 100sps • Type of Telemetry : Frame Relay Time mark is given on site. • Black line: achieved in 2011 • Blue line: ongoing project as the phase II • White line: planned project as phase III Land Station Observed Node Latitude Longitude Meter Sea Depth

  9. Integration for all CWB Seismic Networks • Central Weather Bureau, Taiwan Updated Seismic Networks Bore-Hole Seismic Network • Cable Ocean Bottom Seismic Network • Institute of Earth Sciences, Academia Sinica , Taiwan • Broadband Array in Taiwan for Seismology (BATS) • Yangmingshan (YMS) Volcano Seismic Network • Other Institutions • Incorporated Research Institutions for Seismology (IRIS) • : 3 JMA (Japan) Stations

  10. Policy of SCNL Station Channel Network Location

  11. Example: Cheng Kung Station

  12. Integrated Seismic Network Total 144 Sites 249 Instruments 68 The Earthworm system is used for integrating seismic networks. Operators are able to request different kinds of real-time data from this Earthworm system. 17 33 21 9 3

  13. System Architecture Smart24a BH BB OBS Others TCP/IP Receiving Layer module module module module module Data Exchange Integrated Layer Earthworm Earthworm Earthworm Earthworm Application Layer Earthquake Rapid Report Earthquake Early Warning Tsunami Early Warning Fault Plane Solutions Earthquake Catalog

  14. CWB24 Format File Header (24 bytes) Port Header (32 Bytes each port)

  15. GPS Status CHY

  16. Integrated CWB Seismic Network Bore Hole IES-YMS Broad Band IRIS-JPN Acceleration Acceleration IES-BATS Short Period Short Period

  17. http://cwbsnbb.cwb.gov.tw/index_en.htm

  18. http://www.cwb.gov.tw/V7e/earthquake/

  19. Thanks for your attention.

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