An earthquake of moment magnitude 7.6 struck Kocaeli Province, Turkey on 17 August 1999. According to official figures, at least 18,373 people died and 48,901 people were injured during the earthquake, and 5,840 people were missing. At least 155 deaths were associated with the tsunami. The damage was estimated at between $12 billion and $20 billion (in 1999 U.S. dollars) according to various sources such as the World Bank. The earthquake was named for the epicenter's proximity to the northwestern city of İzmit. It occurred at 03:01 local time (00:01 UTC) at a shallow depth of 15 km (9.3 mi). A maximum Mercalli intensity of X (Extreme) was observed. The earthquake lasted for 37 seconds, causing seismic damage, and is widely remembered as one of the deadliest natural disasters in modern Turkish history.
The 1999 earthquake was part of a seismic sequence along the North Anatolian Fault that started in 1939, causing large earthquakes that moved progressively from east to west over a period of 60 years. The earthquake encouraged the establishment of a so-called earthquake tax aimed at providing assistance to those affected by the earthquake, and the creation of National Disaster Insurance Institution for providing compulsory earthquake insurance.
Why this event still matters
Historical incidents shape the rules that protect people today — building codes, evacuation policy, warning systems and inspection regimes almost always trace back to a specific disaster. Studying 1999 İzmit earthquake alongside current events is how preparedness improves.
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