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Northern African networks and links to European networks

Northern African networks and links to European networks. Marco Olivieri INGV, Rome Orfeus WG II. Euro-African Seismicity. Earthquake Monitoring at regional scale. Quick RCMT for the 07 Feb 2005 Mw 5.1 occurred in Tunisia (courtesy of Silvia Pondrelli) . Short Period Networks.

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Northern African networks and links to European networks

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  1. Northern African networks and links to European networks Marco Olivieri INGV, Rome Orfeus WG II

  2. Euro-African Seismicity

  3. Earthquake Monitoring at regional scale • Quick RCMT for the 07 Feb 2005 Mw 5.1 occurred in Tunisia (courtesy of Silvia Pondrelli)

  4. Short Period Networks Morocco : 57 Algeria : 55 Tunisia : 19 Lybia : 1 Egypt : 72

  5. Algeria • Craag runs a network of 21 telemetered SP vertical stations + 6 stand-alone. http://www.craag.edu.dz/ess

  6. MedNet

  7. 4 Broad-Band Stations were deployed in Northern Africa in the ‘90s: • KEG (Kottami, Egypt) Closed, • GFA (Gafsa, Tunisia) Closed, planned survey field trip for early summer 2005 • MEB (Medea, Algeria)Broken since 1994, hope to reopen it in 2005 • MDT (Midelt, Morocco) replaced by RTC (Rabat City). MDT will be a CTBT site

  8. RTC, Rabat Morocco • Operating in Real-Time since 2002 (Open) • Equiped with STS-1 and Quanterra Q680 • Mantained in cooperation with Laboratoire de Geophysique, CNRS, Rabat • We learned: • Remote places are perfect but not maintainable! • Strong cooperation with local Seismological Institutes is necessary

  9. Geoscope

  10. Presently 4 Geoscope stations in the area, all of them do not have Real-Time connection: • TAM (Tamarraset, Algeria):will be updated with RT SATELLITE connection in 2005 • ATD (Arta Tunnel, Djibouti) was duplicated by a CTBT station that do not work at present. • MBO (Mbour, Senegal) • BNG (Bangui, Centre Afrique) operated in cooperation with CERD (Centre d'Enseignement et de Recherche de Djibouti). Closed in 2001 • Hopefully reopened in 2005

  11. orfeus ORFEUS is the European non-profit organisation that aims at coordinating and promoting digital, broad-band seismology in Europe.

  12. Permanent BB Seismic stations in and around Europe Source: ORFEUS WG1

  13. Virtual European Broadband Seismic Network (VEBSN) Real-time waveform data Status Dec 2004 ~ 120 stations connected Red triangle real-time connection Orange triangle delay > 1 hour Yellow triangle pending connection Blue squares contributing observatories

  14. EUROPEAN-MEDITERRANEAN SEISMOLOGICAL CENTRECENTRE SISMOLOGIQUE EURO-MEDITERRANEEN www.emsc-csem.org • EMSC runs an Earthquake Warning System for potentially damaging earthquakes in the Euro-Med region which consists of the rapid determination of the epicentre and the dissemination of the seismic alert message within the hour following the occurrence of the earthquake. • Mantains a EuroMed Bullettin integrating data provided by 58 network from Europe Northern Africa and Midlle East • Play the role of catalyst and facilitator, promoting and coordinating cooperation and integration of newtorks at regional scale

  15. Real time Seismicity/Alert • 1,000 stations • 51 networks • 8 to 10,000 events / yr • 4 000 end-users • 40 000 pages and 6 000 visitors / day

  16. Euro Med Bulletin 2001-2003 • Rapidly (within few months) produce an homogeneous bulletin for M>3 • Better location for border regions and off-shore seismicity • Phase association (database) • Improve data availability • Coordinated with ISC • 58 networks • 1,677 stations • 2001: • 5,191 ev. • 138,719 arrival times • 2002: • 5,348 ev. • 155,765 arrival times • 2003: • 6,455 ev. • 185,650 arrival times

  17. EERWEM (accepted): Earthquake and Earthquake Risk in WEstern Med: Meeting in San Fernando (Oct. 2005?) EEREEM (TBS): Earthquake and Earthquake Risk in Eastern Med: Meeting in Cairo (spring 2006?) Technical projects (EC funds) • Dedicated to network operators • Compile the needs (regional data exchange, training, auto processing…) • Implement existing tools (autoDRM, SeiComP…) • Prepare more ambitious projects

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