Izmet, Turkey Earthquake By Molly Sumpter. Outline ► tectonic setting of Turkey, North Anatolian Fault ► August 17, 1999 event ► outcomes, what was learned.

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Presentation transcript:

Izmet, Turkey Earthquake By Molly Sumpter

Outline ► tectonic setting of Turkey, North Anatolian Fault ► August 17, 1999 event ► outcomes, what was learned from this quake

Tectonic Setting ► Convergence between the African and Eurasian plates  results in the westward motion of the Turkey plate on which most of the land area of Turkey lies. ► The plate is bounded to the north by the 1200-km-long North Anatolian Fault, and to the south by the Southern Anatolian fault which slip respectively in a right-lateral and left-lateral sense. ► The Black Sea margin of Turkey lies on the EuroAsian Plate  strike-slip earthquakes with little or no vertical slip. ► The western margin of Turkey is a region of convergence with the Aegean Sea floor  thrust-type earthquakes with a substantial vertical slip component.

North Anatolian Fault Scientists fear segments could act as dominos if enough stress is transferred through segments The North Anatolian fault is very similar to San Andreas fault in California similar slip rates total length and straightness relative to their poles of rotation

August 17, 1999 ► 3:00 am ► Lasted 45 seconds ► 7.4 magnitude ► Epicenter was 7 miles east of Izmit ► 10.5 miles below ground ► Felt in Africa ► Death toll between 30-40,000

WHAT WENT WRONG?

Lessons Learned ► Loss of life and building collapse was avoidable.  new buildings performed very poorly because they were not properly designed, not properly constructed, or located on ground that failed from shaking or faulting. ► Severe industrial losses also were avoidable.  The major damage at these facilities could have been avoided with better earthquake resistant structural design, systems design, and planning. ► Limited earthquake insurance availability.  According to the World Bank, only 15% of the residences in the Istanbul urban area are insured for earthquake ► Ground faulting and rupture losses from poor land use planning.  Many structures build on or near a well-known fault

Sources ► FIT_REPORT.htm FIT_REPORT.htm FIT_REPORT.htm ► tastrophe_Reports/Izmit-Turkey-1999.pdf tastrophe_Reports/Izmit-Turkey-1999.pdf tastrophe_Reports/Izmit-Turkey-1999.pdf