The Surface Rupture Characteristics of MW7.8 Pazarcık Earthquake in Turkey on February 6, 2023
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摘要: 2023年2月6日土耳其东南部连续发生2次7级以上破坏性地震，造成大量人员伤亡和建筑物损坏。基于高分辨率遥感系统解译了帕扎尔哲克7.8级地震地表破裂空间分布，结合野外科考验证、基于立体像对生成的高分辨率数字地表模型及余震精定位数据，对帕扎尔哲克7.8级地震地表破裂特征进行分析。该次地震地表破裂主要沿先前断层迹线发育，总长度约为320 km。地表破裂位置地貌特征、野外典型位置调查结果及余震精定位结果均显示该次地震以左旋走滑运动为主，局部伴有小规模垂向运动。最大左旋位移位于东安纳托利亚断裂帕扎尔哲克段，蒂尔克奥卢以南地表破裂逐渐不连续，左旋位错不明显。
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关键词:
- 帕扎尔哲克7.8级地震 /
- 东安纳托利亚断裂 /
- 地表破裂 /
- 高分辨率数字地表模型
Abstract: On February 6, 2023, two consecutive devastating earthquakes that are larger than MW 7 occurred in southeastern Turkey, causing a large number of people dead and buildings damaged. In this paper, the spatial distribution of surface rupture of Pazarcık MW 7.8 earthquake is interpreted based on high-resolution remote sensing images, and the characteristics of surface rupture are analyzed in combination with field research verification, high-resolution DSM generated based on stereoscopic image pairs and aftershock precise location data. The surface rupture of this earthquake mainly developed along the previous fault trace, with a total length of about 320 km. The geomorphologic characteristics of the surface rupture location, the field survey and the aftershock location all show that the earthquake is dominated by left-lateral strike-slip movement, with some small vertical movements. The maximum left-lateral displacement is located in the Pazarcık section of the East Anatolian fault, and the surface rupture is gradually discontinuous and the left-lateral dislocation is not obvious in south of Türkoğlu. This study has great significance for understanding the distribution of the East Anatolia fault in the southwest and its connection with the Dead Sea fault. -
图 1 帕扎尔哲克地震的构造环境、余震分布与地表破裂
Figure 1. The Regional seismic structure, aftershock distribution and surface rupture of Pazarcık earthquake
图 4 帕扎尔哲克地震哈诺巴舍一带地表破裂与地貌特征
Figure 4. The surface rupture and geomorphic characteristics near Hanobası
图 5 格尔巴舍南部地表破裂与地表特征
Figure 5. The surface rupture and geomorphology characteristics in the south of Gölbaşı
图 6 卡赫拉曼马拉什东侧地表破裂与地貌特征
Figure 6. The surface rupture and geomorphology characteristics in the east of Kahramanmaraş
图 7 贝伊奥卢与蒂尔克奥卢之间地表破裂与地貌特征
Figure 7. The characteristics of surface rupture and geomorphology between the Beyoğlu and Türkoğlu
图 8 努尔达伊北侧地表破裂与地貌特征
Figure 8. The surface rupture and geomorphology characteristics in the north of Nurdağı
图 9 努尔达伊南侧地表破裂与地貌特征
Figure 9. The surface rupture and geomorphology characteristics in the south of Nurdağı
图 10 伊斯拉希耶附近地表破裂与地貌特征
Figure 10. The surface rupture and geomorphology characteristics near islahiye
图 11 哈萨附近地表破裂与地貌特征
Figure 11. The surface rupture and geomorphology characteristics near Hassa
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