Introduction to Iraqi Seismological Network ( ISN ) Ali Abd AL.Khalik Ali The Head of department of seismology Iraqi Meteorological Org.&Seismology •Why Seismic Networks in Iraq? •History of the Seismology in Iraq; •Iraqi Seismological Network (ISN) Status; •The Main Objective Of ISN; •The Main Research in ISN; Tectonic Map of Iraq Map of the Arabian Peninsula and surrounding regions Seismicity Map of Iraq, Since 1900 Reviewing the history of the ISN • • • • • • • • The seismological network in Iraq was started at the first in the universities through the Post Graduate studies at the university of Baghdad in 1977. In 1979, the first seismological observatory was operated in the scientific research fondations. In 1980, the seismology unit was established and belong to BRC (Building Research Center) in The scientific research council (SRC). The great updating in the seismological instruments was accorded during 1984.During this year four (4) permanent Seismological stations were operated with new instruments digital and visual recording. This stations are in Baghdad, Mosul,Rutba and Sulaymania. All stations were provided by new equipments observe the earthquake Events in Iraq and the world in both ways, analog and digital recordings. In the late eighties when Iraqi Scientific Research was dissolved the Iraqi seismological Network was transferred to the Iraqi Meteorological Org. and name was Iraqi meteorological Org.and seismology. Another recent development to the ISN was conducted after the last war where recent and updated seismological instruments were installed(10 stations) in the Kurdistan Region in the north of Iraq to deployed in the foothills of the Zagros and Taurus mountain ranges in north and northeast Iraq , and name was (NISN). Each station has Streckeisen STS-2 seismometers and Kinemetrics Q330 Quanterra digitizers. The second system in (2008) is a five-element array in northern Iraq (Each element has an STS-2 seismometer and Q330HR digitizer). In 2008 and 2009, The recently upgraded Iraqi Seismic Network, The upgrade brings the ISN to a total of six broadband permanent seismic stations (Baghdad, Mousul, Kerkuk, Naseria, Rutba, and Badra). Stations, three component broadband stations consists of • • • • • Streckeisen STS-2 Seismometer Quanterra Digitizer Q330 Baler 14 Battery box VSAT System (TSAT) All hardware and software were bought from Kinemetrics, Inc. of USA. Central Station in Baghdad data center consists of • (2) HP xw8400 workstations with ( Seisan & Rockhound) • Altra 25 sun workstation with ( antelope) • HP Compaq 6510B notebook ( Willard, Cimarron, balaradd,Pecos….) • HP 3600DN LaserJet network printer • Cisco 2960 Catalyst 24-port switch • Cisco 2811 modular router • Symmetricom NTS-150 network time server SEISAN PROGRAM A map showing the distribution of NISN stations. No. Station Name 1 KSBB 2 Latitude (degrees) Longitude (degrees) Elevation (meters) 35.0415 45.7092 550 KSSS 35.7696 46.2362 1515 3 KSWW 36.1493 45.2624 1310 4 KSJS 35.4965 45.3452 825 5 KEHH 36.6764 45.0470 1725 6 KESM 36.9846 44.1981 1000 7 KDDA 37.2125 42.8207 750 8 KEKZ 35.9893 44.0970 450 9 MSL 36.3817 43.1483 242 10 BHD 33.2744 44.3858 32 A map showing the location of 190 events recorded by NISN (red solid circles) for the period 30 November 2005 to 8 January 2006, ISC (green crosses), and the USGS (blue crosses) for the same period. A histogram showing the number of events reported by NISN (red bar), ISC (green bar), and USGS (blue bar) for the same time period. The New stations (ISN) No. Station Name 1 BHD 2 Latitude (degrees) Longitude (degrees) Elevation (meters) 33.27 43.38 32 MSL 36.29 43.09 242 3 RTB 33.02 40.3 624 4 NSR 31.02 46.24 5 5 IBDR 33.11 45.93 64 6 IKRK 35.4 44.34 331 The Iraqi Seismic Stations In the line with signs of recovery in Iraqi seismology, the Iraqi Meteorological Organization and Seismology has joined to ISC and EMSC. ISN stations in EMSC The main objective of ISN • Recording and analysis of earthquakes • Issuing a monthly earthquake bulletin • Research studies and microzonation, seismic hazard assessment, and microearthquakes studies • Preparing a technical report (site selection) for the vital and important structures in Iraq such as dams, thermoelectical stations, bridge…. • introducing an earthquake data to The university for the research programs • Research studies and Microzonation seismic hazard assessment. and Micro earthquakes studies. The main research in ISN • Monotoring and analysis of earthquakes at the Iraqi dams. • Hazard and Risk assessment for Iraq in PGA term and epicentral intensity I0 . • Microzonation, microtremor observations. • Prediction and earthquake prone area. • Crustal studies. • Iraqi seismic design code for building. • Estimate the seismic velocity and attenuation structures of the study area using the dispersion and receiver functions of observed surface and body waves, respectively This picture shows the first system that used in Iraq The old seismic system that have three drums , each drum represents one of the components (Z,N,E).