THE NATIONAL STRONG MOTION NETWORK OF TURKEY EARTHQUAKE DEPARTMENT REPUBLIC OF TUKEY PRIME MINISTRY...

THE NATIONAL STRONG MOTION NETWORK OF TURKEY

EARTHQUAKE DEPARTMENT

REPUBLIC OF TUKEYPRIME MINISTRY

DISASTER AND EMERGENCY MANAGEMENTPRESIDENCY

EARTHQUAKE DEPARTMENT

Ulubey Ceken ,Eren Tepeugur, Turgay Kuru,, Aytac Apak, Derya Kokbudak, Vedat Ozsaraç, Selim

Sezer and Cuneyt Sahin.

REPUBLIC OF TURKEYPRIME MINISTRYDISASTER AND EMERGENCYMANAGEMENT PRESIDENCYEARTHQUAKE DEPARTMENT

HISTORY OF STRONG MOTION NETWORK

Once, all stations were analog as the then-available technology. After 1993, digital accelerometers were added to the Network.

Today, thanks to the technology, data has been achieved real time and high quality due to increasing number of stations rapidly.

The National Strong Motion Network of Turkey was established in 1973.

SM Network in Turkey has been operated by «The Republic of Turkey, Prime Ministry, Disaster Emergency Management Presidency, Earthquake Department» .

REPUBLIC OF TURKEYPRIME MINISTRY

DISASTER AND EMERGENCYMANAGEMENT PRESIDENCYEARTHQUAKE DEPARTMENT

MAIN GOALS OF STRONG MOTION NETWORK

OVERVİEW The SM Network consist of 387 strong-motion observation stations with spacing

of 50 km.

There are 5 different model digital accelerometers in the network.



The accelerometers are generally installed on the North Anatolian Fault System (NAFS), East Anatolian Fault System (EAFS) and Aegean Graben System where the big earthquakes occurred or the expected active areas.



OVERVİEW

LOCAL NETWORKSLocal networks are established with specific geometrical arrays on active fault systems in order to observe seismic activity closely.



An Example of local networks: IZMIR-NET established by the context of “Modelling Of Seismic Site Response For Earthquake Resistant Structural Design in İzmir Metropolitan Area and Aliağa-Menemen Districts” Project REPUBLIC OF TURKEY

PRIME MINISTRYDISASTER AND EMERGENCYMANAGEMENT PRESIDENCYEARTHQUAKE DEPARTMENT

LOCAL NETWORKS



ACCELEROMETER STATIONS

While installing,

Active tectonic lines,Population of cities and the density of building, Different geological structures, Energy lines, Communication, Security, Environmental noise, Transportation etc.

conditions are considered.

The instruments are located in governmental buildings area owing to being safety and ease of maintenance.

These instruments are installed in the containers as free fields.

Base-concrete of containers is (220cmx220cmx30cm)

The middle-concrete that accelerometers are mounted is (40cmx40cm x60cm)

Half of middle-concrete is on the ground and the other half is under the ground.

There is 20cm space between base and the middle- concrete. Space between them is full of mixture of sand-grovel.





SITE INVESTIGETIONS

The local site conditions of stations were obtained by in-situ geotechnical and geophysical surveys.

VS30 measurements with MASW profile (100 m)

Borehole (30m)



The average of shear-wave velocity for upper 30m soil layer (VS30) is obtained at the each strong-motion site thanks to multi-channel analysis of surface waves (MASW), which is used for defining of soil classification.



Concerned researcher can provide « Station Information Form» over the Internet through this search engine .

COMMUNICATION

Data is transmited to the central office as continuous or trigger mode with communication instruments (Dial-up, Internet, ADSL, GPRS/EDGE).

Data is submitted to users through main server after process.





TYPES of ACCELEROMETER

There are 5 digital different type of accelerometers in the network. All of them have three component acceleration sensors .

QDR, modified from SMA-1, has 12 bits resolution.

SMACH has 72 dB sensitivity and 12 bits digital converter.



GSR type accelerometers have 16 and 18 bits digital converter.

ETNA type records have 18 bits resolution.

CMG-5TD is an integrated DM-24 high resolution digitizer.

TYPES of ACCELEROMETER

DATA CENTER

MAIN SERVER DATA CENTER

The data management center is located in Ankara.



Elastic spectral parameters of all records was also determined for researchers by using the same filter method.



Within the framework of the project entitled “Compilation of The National Strong Motion Network Database According to International Standart“, 3000 events and 4600 raw accelerometric data (between 1976 and 2007) is prosessed uniformly with a consistent methodology through the software called USDP (Utility Software for Data Processing) .

Windows-based software (USDP) was developed during the project for the filter process (Akkar and Bommer, 2006) of records in the database.

DATA PROCESS

DATA FORMAT



It is possible to be reached to all of accelerograms for researcher since the establishment of Turkish National Strong Motion (1973).

An example of file names is

Date(yyyymmdd)+time(hhmmss)+

abbreviation of the station

(1201)

(ex.20030501002704_1201).

All data are ASCII format as seen figure.

All data are ASCII format as seen figure.



In the header information there are three components of acceleration data like; N-S (North-South), E-W (East-West) and U-D (up-down).

Until now, There have been about 7600 acceleration records, which are presented via Internet to all researchers and scientific areas.

Sample intervals for each records can be found beneath the header "SAMPLE INTERVAL".

Set-off correction process is applied for untreated data . Unit of all acceleration data is cm/sn2 (gal).

DATA FORMAT



Enhancement of the National Strong Motion Network and Establishing Seismic Arrays in Turkey

(Nato Science For Peace Program – Sfp977484)"BYTNet and DATNet"

Establishment of Local Strong Motion Seismic Array(TUBITAK ICTAG-1578/YMAU )"MATNet"

Establishment of Local Strong Motion Seismic Array(Project Number: 040302)"ANANet"

Compilation of The National Strong Motion Network Database According to International Standart(TUBITAK Project Number :105G016)

Modelling Of Seismic Site Response For Earthquake Resistant Structural Design In İzmir Metropolitan Area And Aliağa-Menemen DistrictsTUBITAK-KAMAG Project (No: 106G159)

PROJECTS



WEB PAGE

User Interfaces

If earthquake point on the map is clicked, event page

opens

Web Page of our system is http://kyh.deprem.gov.tr

Daily strong motion records, Earthquake Reports ( M4), Station Information and their maps are always up to date.

Detailed Special Reports are also published after the destructive earthquake occurred.

Users can provide by using search engine about the station or earthquake information and then they can download the Raw Data.

Users can find data from a

particular station by

going to the station pages

WEB PAGE



Users can download all data easly



At the beginning of 2013, it is aimed to have 450 stations in the network. Furthermore, total station number will be 1000 until 2023.

To increase the number of local or regional array,

To implement shake and intensity maps,

Strong-motion indexes such as real-time intensity, acceleration, velocity, displacement, and response spectra are continuously and automatically to be calculated to utilize for seismic hazard analysis

To review processed accelerograms in order to produce data being uniform and NGA standards

To develop attenuation relationships at the regional and country scale,

Local geology and Vs profile of all stations will be completed.

At the beginning of 2013, it is aimed to have 450 stations in the network. Furthermore, total station number will be 1000 until 2023.

To increase the number of local or regional array,

To implement shake and intensity maps,

Strong-motion indexes such as real-time intensity, acceleration, velocity, displacement, and response spectra are continuously and automatically to be calculated to utilize for seismic hazard analysis

To review processed accelerograms in order to produce data being uniform and NGA standards

To develop attenuation relationships at the regional and country scale,

Local geology and Vs profile of all stations will be completed.

TARGETS

Thank You Thank You ！！

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