The surface rupture and slip distribution of the 17 August 1999 Izmit earthquake (M 7.4), North Anatolian fault
The surface rupture and slip distribution of the 17 August 1999 Izmit earthquake (M 7.4), North Anatolian fault
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DOI：
10.1785/0120000841
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发表时间：
2002-02-01
影响因子：
3
通讯作者：
Page, W
中科院分区：
文献类型：
--
作者：
Barka, A;Akyüz, HS;Page, W
1999年8月17日伊兹米特地震发生在北安纳托利亚断层带的北岸。此次地震与145公里长的地表破裂有关，该破裂从东部的迪兹杰西南部延伸到西部的赫塞克三角洲西部。表面破裂的详细绘图显示，它由五个部分组成，通过释放步距将其分开；其中从西向东分别命名为赫塞克、卡拉穆塞尔-戈尔居克、伊兹米特-萨潘贾湖、萨潘贾-阿基亚齐和卡拉德雷段。 Hersek 段切割了破裂带西端大三角洲平原的尖端，方向为 N80 度。 N70°-80°东向的卡拉穆塞尔-戈尔居克段沿着伊兹米特湾线性南部海岸在卡拉穆塞尔和戈尔居克之间延伸，并在戈尔居克产生了 470 厘米的最大位移。 Karamursel-Golcuk 和 Izmit-Sapanca 段之间的西北-东南走向的 Golcuk 正断层的最大垂直位移为 2.3 米。沿伊兹米特-萨帕尼亚湖段测得的最大右偏移约为3.5 m，其趋势在N80°E和东西向之间变化。 Sapanca-Akyazi 段走向 N75°-85°W，最大位移为 5.2 m。 Karadere 段走向 N65°E，产生高达 1.5 米的最大位移。 Karadere 和 Sapanca-Akyazi 段在其东端附近形成扇形或张开的断裂，位移也随之减少。
The 17 August 1999 Izmit earthquake occurred on the northern strand of the North Anatolian fault zone. The earthquake is associated with a 145-km-long surface rupture that extends from southwest of Duzce in the east to west of Hersek delta in the west. Detailed mapping of the surface rupture shows that it consists of five segments separated by releasing step-overs; herein named the Hersek, Karamursel-Golcuk, Izmit-Sapanca Lake, Sapanca-Akyazi, and Karadere segments from west to east, respectively. The Hersek segment, which cuts the tip of a large delta plain in the western end of the rupture zone, has an orientation of N80degrees. The N70degrees-80degreesE-trending Karamursel-Golcuk segment extends along the linear southern coasts of the Izmit Gulf between Karamursel and Golcuk and produced the 470-cm maximum displacement in Golcuk. The northwest-southeast-striking Golcuk normal fault between the Karamursel-Golcuk and Izmit-Sapanca segments has 2.3-m maximum vertical displacement. The maximum dextral offset along the Izmit-Sapanea Lake segment was measured to be about 3.5 m, and its trend varies between N80degreesE and east-west. The Sapanca-Akyazi segment trends N75degrees-85degreesW and expresses a maximum displacement of 5.2 m. The Karadere segment trends N65degreesE and produced up to 1.5-m maximum displacement. The Karadere and Sapanca-Akyazi segments form fan-shape or splaying ruptures near their eastern ends where the displacement also diminished.