Seismological Bureau of Inner Mongolia Autonomous Region

Hohhot, China

Seismological Bureau of Inner Mongolia Autonomous Region

Hohhot, China
SEARCH FILTERS
Time filter
Source Type

Liu F.,Seismological Bureau of Inner Mongolia Autonomous Region | Jiang C.-S.,China Earthquake Administration | Zhang F.,Seismological Bureau of Inner Mongolia Autonomous Region | Zhang W.-T.,Seismological Bureau of Inner Mongolia Autonomous Region | And 4 more authors.
Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | Year: 2013

In this paper monitoring capacity of Inner Mongolia seismic network is evaluated, aiming at offering information for scientific layout of seismic stations. We analyze the temporal and spatial character of record stations number, maximum station coverage azimuth and minimum magnitude of completeness (Mc) based on the observation reports and catalogues in Inner Mongolia regions. The results reflect the development of the monitoring capacity. The Mc in Hohhot region was around ML2.0 and over ML3.0 in the juncture of Mongolia and Inner Mongolia during "analogy" era (1990-2001). The monitoring capacity has been improved in the Midwest of Inner Mongolia region and the adjacent areas during "analogy digital parallel" era (2002-2007), with Mc reaching as low as ML2.2 in most of Inner Mongolia and its adjacent areas during "digital" era and the 10th five-year project period (2008-2012) because the layout of stations is more reasonable and the influence of long narrow region shape has been overcome. This study facilitates the future seismic activity analysis and the seismic hazard assessment in this region.


Ding F.,Seismological Bureau of Inner Mongolia Autonomous Region | Han X.,Seismological Bureau of Inner Mongolia Autonomous Region | Ha Y.,Inner Mongolia University | Dai Y.,Seismological Bureau of Inner Mongolia Autonomous Region | Liang Y.,Seismological Bureau of Inner Mongolia Autonomous Region
Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | Year: 2015

The study of porosity and rock compressibility etc has important application value in the evaluation of the elastic capacity and dynamic geological reserves of the reservoir. Water level digital data of 8 wells provided by the National Earthquake Precursor Network Center are studied to explore the relationship of porosity and volume compression coefficient between solid skeleton and water in artesian well aquifer medium under undrained condition. The results show that there exists a power function relation between the porosity and the solid skeleton volume compression coefficient and water volume compression coefficient in the aquifer. In the first quadrant, each well aquifer solid skeleton volume compression coefficient increases with increasing porosity, whereas the volume compression coefficient of water decreases with the increase of porosity, with one of two quadratic polynomial relationships between the solid skeleton and water volume compression coefficient in the aquifer. The volume compression coefficient of water in the aquifer is larger than that of the solid skeleton, and water is more easily compressed. In addition, the compression coefficient of limestone skeleton is relatively smaller than that of sandstone. ©, 2015, China University of Geosciences. All right reserved.


Gao L.-X.,Seismological Bureau of Inner Mongolia Autonomous Region | Sun J.-L.,Seismological Bureau of Inner Mongolia Autonomous Region | Zhang H.,Seismological Bureau of Inner Mongolia Autonomous Region
Earthquake | Year: 2010

This paper analyzed Ms≥.5.0 earthquakes since 1923 in the region of Sichuan. The result shows that strong earthquakes in the region experienced four complete cycle of seismic activities, and there is a 16-year quasi-periodic characteristics for medium to strong earthquake. The quiet period lasted about 5 years. Starting from the 2008 Wenchuan 8. 0 earthquake, the study area will enter into the fifth active cycle and continue to about 2024. Quiescence intervals for M5. 0∼5. 9, M6. 0∼6. 9, and M7. 0∼8. 0 events reached the historical highest before the May 12 , 2008 Wenchuan 8.0 earthquake. Long-term quiescence of strong earthquake is the most significant anomaly before the Wenchuan 8. 0 earthquake.


Xue D.,Seismological Bureau of Inner Mongolia Autonomous Region | Zhang J.,Seismological Bureau of Inner Mongolia Autonomous Region | Zhao A.,Seismological Bureau of Inner Mongolia Autonomous Region
Acta Seismologica Sinica | Year: 2012

An original time series signal can be decomposed into a trend-cycle, including seasonal cycle, component and an irregular component. The trend-cycle part is defined as underlying level of the series, and is a manifestation of medium-long term variation influenced by fluctuation and cycles referring to generally deterministic or predictable change of a series. The irregular component contains the residual variation and random abrupt changes, etc., being unpredictable. Knowing the trend-cycle component, the irregular part can be calculated. Based on the investigation of the faults associated with the 1975 Haicheng M s7.3 earthquake, this study reasonably determined the area window of the Haicheng earthquake series. Then the time series of monthly earthquakes in the Haicheng seismicity window was decomposed. The trend-cycle component of the series was determined using ARIMA (atuo regression integrated moving average) model and the irregular variation was also extracted. The reaction of the anomalous abrupt variation to the M s≥6.0 earthquakes in North China and M s≥5.0 earthquakes near the seismicity window was analyzed. The result shows that the anomaly of abrupt seismicity variation may be taken as an indicator with prediction ability. This is of significance in earthquake prediction.

Loading Seismological Bureau of Inner Mongolia Autonomous Region collaborators
Loading Seismological Bureau of Inner Mongolia Autonomous Region collaborators