RELEMR WORKSHOP

İSTANBUL - 2008

Ministry of Public Works and Settlement General Directorate of Disaster Affairs EARTHQUAKE RESEARCH DEPARMENT (GDDA- ERD)

NATIONAL SEISMICNETWORKS OF

TURKEY

Sami ZÜNBÜL and Yıldız IRAVUL

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National Strong Ground Motion and Weak Ground Motion networks have been operated by

The Ministry of Public Works and Settlement, General Directorate of Disaster Affairs,

Earthquake Research Department,Ankara

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NATIONAL WEAK GROUND MOTIONNATIONAL WEAK GROUND MOTION

NATIONAL STRONG GROUND MOTIONNATIONAL STRONG GROUND MOTION

Total #137

Total #209

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Developments of Turkish National Seismic networks through time

31

47

61

137

0

30

60

90

120

150

2004 2005 2006 2007

156172

192

214

Planing 270

0

100

200

300

2004 2005 2006 2007 2008

Weak Ground Motion Strong Ground Motion

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National Strong Motion Network

At present, the number of stations is 209. At the end of 2008, we are planning to increase the number of stations to 270.

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National Weak Motion Network

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National Weak Motion Network

At present, the number of stations is 137 . We are going to install 3 more stations along NAFZ.

Broad-band Station (58)- 120 sec of CMG 3TD

Very Broad-band Station (1)GSL – ANTO (USGS-IRIS) - 360 sec of Geotech KS-3600

Local Network- Broad-band Station (59)- 120 sec of CMG 3TD

3- Component Short Period (7)- 1 sec of Geotech S13J and CMG-DM24MK3 Digitizer

1- Component Short Period (12)- 1 sec of Geotech S13 CMG-DM16R8 ADC card

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Stations and Instrumentations

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Earthquake Watching System by Earthworm

1. STEPScream sends data to

Earthworm.

2. STEPEarthworm runs and

determines rapidly earthquake location.

3. STEPThis program shows

earthquake location on the map and gives its information.

Network and System

All seismic data has been observed 24 hours continuously and issued immediately the center of Seismology Division (http://sismo.deprem.gov.tr/DEPREM/SONDEPREMLER/sondepremler.php)

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TURDEPTHE RESEARCH PROJECT ON THE EARTHQUAKE BEHAVIOR OF THE REGIONS WITH HIGH SEISMIC RISK (GEO-STRATEGIC) BUT

DIFFERENT TECTONIC REGIMES BY A MULTIDISCIPLINARY APPROACH

For earthquake hazard reduction, it is aimed to observe earthquake activity and earthquake precursors by multidisciplinary studies related to the three main fault zones in our country and to introduce the earthquake hazard seriously in the regions under risk. Thus, a data base information will be obtained for a disaster management system in the international standards. 14 universities participate in this project which is supported by Tubitak- MarmaraResearch Center.

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DEPAR IMMEDIATE OBSERVATION AND

INVESTIGATIONS AFTER EARTHQUAKE GDDA-TUBITAK MARMARA RESEARCH CENTER

AIM: For the cases which affect the settled areas in our country and given below:• Earthquakes with magnitudes equal to or greater than 6.0 and cause loss of lives and damage,• Earthquakes with magnitudes smaller than 6.0 and occur often in the same region which is called earthquake swarm and cause inconvenience in public as an unusual situation,To investigate the reasons of the damages in the buildings caused by the ground conditions after the earthquake, to determine the characteristics and behavior of earthquakes delicately, to constitute necessary measurements for the epicentraldetermination of the destructive aftershocks and immediate earthquake observation, to inform the authorities and public about the preliminary determinations and resultsResearch Group (DEPAR) consists of four subgroups;

• Group for Earthquake Seismology• Group for GPS Deformation• Group for Accelerometers• Group for Remote Sensing and Geological Mapping.

DEPAR Project BALA Earthquake Aftershock observation stations (Dec. 21, 2007)

BALA Earthquake Aftershock distributions (Dec. 20, 2007- Feb. 28 Şubat, 2008)

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Our Aim and Plans

To develop our present network for quick and correct determination of the epicentral parameters of earthquakes with M>3.0,To complete basic facilities for the waveform data exchange with theseismological Data Centers.

Seismicity of Turkey (M>4.0, 1900-2008)

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Thank you.

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