Seismic Signal Characteristics of Seismicity Data in the Northern Segment of the Yishu Fault Zone

Abstract

This paper aims to study the correlation between the northern segment of the Yishu fault zone and the moderate-strong earthquake activities in the northeast region. The dynamic seduction of the western Pacific Plate and the tectonic environment of the northern segment of the Yishu fault zone are considered in this preliminary analysis. The seismic activities in this region play a role of a seismic window with the following characteristics: (1) Frequent occurrence of ML≥3.0 earthquakes in the window area is a signal indicating moderate - strong earthquakes in the northeast region, and the opening condition of the window is a frequency of 6. (2) The higher the frequency of ML>3.0 earthquakes in the window area, the further distance the moderate-strong earthquakes in Heilongjiang and its surrounding areas from the window boundary. (3) The higher the frequency of ML≥3.0 earthquakes, the larger the magnitude of moderate-strong earthquakes in Heilongjiang and its surrounding areas. In this paper, a retrospective study of earthquakes with ML≥5.0 in Northeast China since 1999 was carried out by using the above methods. It was found that when the opening condition of the "signal type" window was met, moderate and strong earthquakes in northeast China were more frequent.