Скачать презентацию On Monitoring the Seismicity of the Aegean Sea Скачать презентацию On Monitoring the Seismicity of the Aegean Sea

564636d08ee45f47dc68b355c292bf98.ppt

  • Количество слайдов: 26

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

Main Objectives and Tasks of the ISC 1. Final collection, analysis and publication of Main Objectives and Tasks of the ISC 1. Final collection, analysis and publication of standard earthquake information from all over the world. 2. Re-determine earthquake locations making use of all available information. 3. Search for new earthquakes, previously unidentified by individual agencies. 4. Compile the most accurate and most complete catalogue of earthquakes occurring around the globe. 5. Compile the most complete list of arrival times of seismic waves associated with each of the listed earthquakes.

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

Data collected from more than 3000 seismic stations Data collected from more than 3000 seismic stations

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

An Exercise in the East Mediterranean Region The region is monitored by the seismic 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

Eastern Med. & Middle East Eastern Med. & Middle East

“Detectability” of the Turkish networks “Detectability” of the Turkish networks

“Detectability” of the Cypriot network “Detectability” of the Cypriot network

“Detectability” of the Egyptian network “Detectability” of the Egyptian network

“Detectability” of the Israeli network “Detectability” of the Israeli network

“Detectability” of the Jordanian network “Detectability” of the Jordanian network

“Detectability” of the Saudi network “Detectability” of the Saudi network

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

Distribution of Seismic Stations 1999 -recent Distribution of Seismic Stations 1999 -recent

SEISMICITY OF THE REGION 1904 -2002 SEISMICITY OF THE REGION 1904 -2002

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

During 1990 -2002, 1968 earthquakes out of 58269 (3. 4%), were not reported to 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

HYPOCENTRE LOCATION DISCREPANCY 1999 -2002 HYPOCENTRE LOCATION DISCREPANCY 1999 -2002

Location of disputed events Location of disputed events

Frequency Magnitude distribution in the Aegean Sea region ISC Bulletin 1964 -2002 ~4. 3 Frequency Magnitude distribution in the Aegean Sea region ISC Bulletin 1964 -2002 ~4. 3 b ~1

Data Availability WEBSITE/FTP - Automated seismological bulletins available as soon as data arrives at Data Availability 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. www. isc. ac. uk ftp: //ftp. isc. ac. uk

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