Intra-basinal water movements induced by faulting: the August 17, 1999, Gölcük (İzmit Bay) earthquake (Mw=7.4)
✍ Scribed by H Öztürk; H Koral; E.L Geist
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 647 KB
- Volume
- 170
- Category
- Article
- ISSN
- 0025-3227
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✦ Synopsis
A strong earthquake M w 7:4 occurred near the town of Go Èlcu Èk, I Ç zmit Bay, Western Turkey, at 00:01 GMT on August 17, 1999. I Ç zmit Bay is a E±W trending pull-apart basin with a surface area of about 300 km 2 along the North Anatolian Fault Zone (NAF), in the eastern extension of the Sea of Marmara. The earthquake was caused by a westerly movement of the Anatolian plate along NAF and was accompanied by isolated, chaotic water movements along the northern and southern shores of the bay. At localities along the shoreline a sudden drop in sea level, and a subsequent rise was prominent. The mode of observed sealevel movements rules out the occurrence of a basin-wide tsunami, sensu stricto. Instead, the water movements are attributed to localized sudden dip±slip movements of fault blocks in this pull-apart basin.