Abstract
ABSTRACT In recent years, moderate earthquakes with a magnitude of about 5.0 have occurred along the Fuyu/Songyuan-Zhaodong fault frequently. This fault is the most seismic active fault in the Songliao Basin, even in the Northeast Seismic Region of China. Based on previous studies, this fault has obvious segmentation from its activity. Some scholars considered the ground stress changes, which caused by the high pressure water injection method of oil exploration in Chaganhua area, maybe the reasonable interpretation of this phenomenon. This paper tries to synthetically assess and review the activity and segmentation of this fault, combining with previous data and the latest research findings. We also tried to reveal the relationship between the high seismicity and high pressure water injection of oil exploration. This effort will help us to understand the fault active characteristics and preparation tectonic conditions of the moderate earthquake in the weak seismic activity region such as the Songliao Basin or the Northeast Seismic Region of China.
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