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On Monitoring the Seismicity of the Aegean Sea and the East Mediterranean Sea

On Monitoring the Seismicity of the Aegean Sea and the East Mediterranean Sea Avi Shapira 1) , James Harris 1) , Nurcan Ozel 2) 1) International Seismological Centre, UK 2) Kandili Observatory and Earthquake Research Institute, Turkey.

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On Monitoring the Seismicity of the Aegean Sea and the East Mediterranean Sea

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  1. On Monitoring the Seismicity of the Aegean Sea and the East Mediterranean Sea Avi Shapira1), James Harris1), Nurcan Ozel2) 1) International Seismological Centre, UK 2)Kandili Observatory and Earthquake Research Institute, Turkey

  2. Final collection, analysis and publication of standard earthquake information from all over the world. • Re-determine earthquake locations making use of all available information. • Search for new earthquakes, previously unidentified by individual agencies. • Compile the most accurate and most complete catalogue of earthquakes occurring around the globe. • Compile the most complete list of arrival times of seismic waves associated with each of the listed earthquakes. Main Objectives and Tasks of the ISC

  3. ISC – The world’s reference to global seismicity

  4. Data collected from more than 3000 seismic stations

  5. Merged data from different agencies, improve azimuth coverage that possibly improve location accuracy. ISC Catalogue may also serve as a reference for assessing completeness

  6. An Exercise in the East Mediterranean Region The region is monitored by the seismic networks of: Turkey Syria Cyprus Lebanon Israel Jordan Egypt Saudi Arabia

  7. Eastern Med. & Middle East

  8. “Detectability” of the Turkish networks

  9. “Detectability” of the Cypriot network

  10. “Detectability” of the Egyptian network

  11. “Detectability” of the Israeli network

  12. “Detectability” of the Jordanian network

  13. “Detectability” of the Saudi network

  14. Agencies that contribute data to ISC on the seismicity of the Aegean Sea

  15. 1999-recent Distribution of Seismic Stations

  16. 1904-2002 SEISMICITY OF THE REGION

  17. THE (1990-2002) ISK (1971-2002) ATH (1924-2002)

  18. During 1990-2002, 1968 earthquakes out of 58269 (3.4%), were not reported to ISC by the local agency. ISC – 698 NEIC- 516 SOF – 189 SKO – 138 IDC - 114

  19. HYPOCENTRE LOCATION DISCREPANCY 1999-2002

  20. Location of disputed events

  21. Frequency Magnitude distribution in the Aegean Sea region ISC Bulletin 1964-2002 ~4.3 b ~1

  22. WEBSITE/FTP - Automated seismological bulletins available as soon as data arrives at ISC - Reviewed seismological bulletin available 20-24 months after real time PRINT - Reviewed 4-monthly Bulletin of the ISC with CD-ROM available approx. 2 years after the events. CD-ROM - Annual ISC Bulletin available approx. 2 years after the events. Data Availability www.isc.ac.uk ftp://ftp.isc.ac.uk

  23. All are invited to become members ! Join the seismological efforts www.isc.ac.uk

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