[1]LI Jiye,MENG Lingsheng,MA Longchen,et al.Characteristics and Mechanism Analysis of the Anomaly of the Diurnal Tidal Wave of the Well Water Level before Earthquakes in the Songliao Basin[J].Journal of Seismological Research,2025,(02):237-246.[doi:10.20015/j.cnki.ISSN1000-0666.2025.0025
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Characteristics and Mechanism Analysis of the Anomaly of the Diurnal Tidal Wave of the Well Water Level before Earthquakes in the Songliao Basin
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
Number of periods:
2025 02
Page number:
237-246
Column:
Public date:
2025-02-10
- Title:
- Characteristics and Mechanism Analysis of the Anomaly of the Diurnal Tidal Wave of the Well Water Level before Earthquakes in the Songliao Basin
- Keywords:
- well water level; tidal response; diurnal wave; the Songliao Basin
- CLC:
- P315.723
- DOI:
- 10.20015/j.cnki.ISSN1000-0666.2025.0025
- Abstract:
- Underground fluid plays a vital role in the process of the earthquake genesis and occurrence. In this paper,the observational data of the water level at Gannan station,Yanshou station,Tonghe station,Zhaodong station,and Beilin station in the Songliao Basin of Heilongjiang Province are selected,and the tidal analysis is carried out by using Venedikov harmonic analysis method. Before 20 moderate- and strong-earthquakes(including earthquake swarms)in Heilongjiang and its adjacent areas from 2008 to 2020,the anomaly characteristics of the tidal diurnal wave of the water level in the wells are obtained,and the anomaly mechanism is analyzed. The results show that: ① There is a matching anomaly of daily tidal wave of the water level in the wells before moderate-and strong-earthquake in Songliao Basin, mainly represented by the synchronous and morphologically consistent anomaly of the water level appeared at three or more stations; The lasting time of the dominant anomaly is 5 months, and the most probable epicenter lies within 200-500 km. ② It is found that the earthquake magnitude is directly proportional to the amplitude of the diurnal wave and inversely proportional to the lasting time of the anomaly. Statistics show that the wider the spatial distribution ranges of the stations which have diurnal wave anomaly, the larger the earthquake magnitude. ③ Before the Arogqi M5.2 earthquake, Longjiang M4.6 earthquake, and Nenjiang M5.0 earthquake near the Nenjiang fault and the Fusong M4.6 earthquake, Jidong M4.1 earthquake, Youyi M4.2 earthquake and Sino-Russian border M4.8 earthquake near the Yilan-Yitong fault and Dunhua-Mishan fault, the anomalous diurnal wave of the water level appeared at stations showed order of “from the epicenter to the surrounding areas”. In the Songliao Basin, before the Anda M4.5 earthquake, Qianguo M5.8 earthquakes, Ningjiang M5.0 earthquake, Ningjiang M4.5 earthquake, and Ningjiang M5.1 earthquake, the anomalous diurnal wave of the water level appeared at stations showed order of “from the surrounding areas to the epicenter”. The phenomenon is mainly related to the dynamic action of the Pacific Plate subducting to Northeast China.
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Last Update:
2025-03-10