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2010-10太康地区发生的M_S4.7地震和许昌-太康断裂的活动构造有关,而许昌-太康断裂在地表未留下任何构造痕迹,处于隐伏构造和隐伏活动状态。为了研究该区域的地壳浅部结构、断裂的空间展布及断裂的活动性,2015-10在太康县城以西震中区域完成了3条跨许昌-太康断裂的浅层地震反射剖面。结果表明,在深度1 000m以内,地震剖面揭示了5条断裂特征清楚的正断层,其中位于剖面南部向北倾的4条断层和位于剖面北部1条向南倾的断层形成相向倾斜关系,剖面上能分辨的断裂深度在75~150m之间,到达第四系地层,并且处于活动构造状态,这些断层可能和太康多次发生的地震有关。
2010-10 The M_S4.7 earthquake in Taikang area was related to the active structure of the Xuchang-Taikang fault, while the Xuchang-Taikang fault left no structural traces on the surface and was in a concealed tectonic and concealed state of activity. In order to study shallow crustal structure, spatial distribution of fracture and fault activity in this area, three shallow seismic reflection profiles across the Xuchang-Taikang fault were completed in the epicenter area west of Taikang County in 2015-10. The results show that within the depth of 1000m, the seismic section reveals five normal faults with distinct faults, of which four faults that are located northward in the south of the section and one section southward in the northern section of the section form an oblique relationship. The section The fault depths that can be discerned between 75 and 150m reach Quaternary stratigraphy and are in an active tectonic setting. These faults may be related to many earthquakes occurred by Taikang.