From 2004 to 2012, multiple strong earthquakes occurred in the western offshore of Indonesia and among them the Indian Ocean earthquake of M9.3 in 2004 has been the greatest in this century in the world. Based on the time series of coordinates at 35 stations of continuous GPS observations in Indonesia and its neighborhood in the global reference frame, the accumulated preseismic, coseismic and post seismic displacements, particularly the accumulated preseismic horizontal displacements and the coseismic horizontal displacements of these earthquakes in the regional reference frame with the core station at BJFS near Beijing on China mainland, are obtained. The crustal movements in the region has been quite complicated as shown by significant mutual influences in the crustal movements that were related at the GPS observation stations because of strong earthquakes of short time intervals and short spacing, scattering over a large area. The features, causes and mutual influences of the preseismic, coseismic and postseismic crustal movements of 5 earthquakes of magnitudes over M8.0 are discussed. Results of GPS observations show that the coseismic horizontal displacements of earthquakes of magnitudes larger than M7.5 were (elastic) rebound of the accumulated preseismic horizontal displacements, which were precursory to the earthquakes. The M9.3 in 2004 and M8.7 in 2005 were close in magnitudes. Occurrence time and spacing and the areas of anomalous crustal deformations in the preparation of both events were both overlapping and non overlapping, which was the prerequisite for the triggering of the latter by the former event. The intensive post seismic horizontal crustal movements of the M9.3 and M8.7 earthquakes significantly contributed to the occurrence of the M8.6 and M8.2 earthquakes in 2012. Though the occurrence of the M8.4 earthquake in 2007 was independent of the M9.3 and M8.7 earthquakes, the postseismic horizontal crustal movements of the M8.4 influenced the coseismic horizontal displacements of the M8.6 and M8.2 earthquakes, south to the equator. Though stations of continuous GPS observations used in this study is small in number and low in density, they have accumulated valuable earthquake cases of complicated crustal deformations before and after multiple strong earthquakes with GPS observations for the benefit of exploring earthquake predictions. The study shows that the western part of Indonesia is one of the most valuable areas for the exploration of earthquake predictions in the world.

As the institutional reform of China’s seismic system and the “14th Five-Year” plan continue to advance, the layout of seismic scientific instruments in the Earthquake Agency of Xinjiang Uygur Autonomous Region has become more dense, digitalized and modernized. As a grassroots central station, the number of instruments that need to be maintained is increasing, and the technical requirements for instrument management and maintenance and the pressure of operation and maintenance are increasing. The geophysical station network, as a frontline position for observing and studying crustal motion and deformation processes, identifying strong earthquake breeding stages and exploring strong earthquake prediction, has a direct impact on the quality of data output and thus on data analysis results and earthquake breeding identification. Therefore, in this paper, we propose some suggestions to improve the efficiency of instrument operation and maintenance for the current situation and problems of the geophysical station network management and maintenance between the operation and maintenance office of Xinjiang geophysical observation center and the central station through literature analysis and interview method.

The probability of earthquake occurring in rural areas is greater than that in urban areas, and rural residents’ awareness of earthquake prevention and disaster reduction is relatively low. Affected by subjective and objective factors, rural areas are prone to property losses and casualties due to earthquake disasters. Based on the sample survey of Midu County, Dali Prefecture, Yunnan Province, this paper analyzes the rural residents’ demand for earthquake prevention and disaster reduction publicity and their willingness to participate in the popularization of earthquake prevention and disaster reduction as the main body, and explores the ways and approaches for the rural residents to participate in the popularization of earthquake prevention and disaster reduction. The analysis shows that under the continuous efforts of traditional media and emerging media, most villagers have been exposed to earthquake knowledge, and they prefer various forms, strong practicability, local characteristics, simple, quick and easy to understand the publicity methods of acquiring knowledge. However, due to the influence of activity information transmission, villagers’ education level, occupation, ability, interest, time and other factors, villagers are not willing to participate in the popularization of earthquake prevention and disaster reduction, and the simple way of implementation and strong incentive method are relatively popular. By increasing the benefits of participation, reducing the cost of participation, and facilitating the flow of information, the participation of all rural residents in the popularization of earthquake preparedness and disaster reduction can be gradually realized.

Based on Landsat 8 OLI/TIRS remote sensing images and the latest fault zone vector data, this paper analyzes and studies the characteristics of the regional fault zone and land surface temperature changes in the Xing’an League region. For the accuracy of land surface temperature inversion, the maximum likelihood classification algorithm is used to classify the surface objects, and then the radiative transfer equation algorithm is used to classify and retrieve the land surface temperature. The surface temperature inversion image and the fault zone structure image are superimposed on the same layer, and the average surface temperature and the average distance in each isozonal zone are calculated by using the method of equal interval segmented mean division, the change characteristics of surface temperature field in fault structure are shown by graph, and the relationship between fault zone and surface temperature field is further described by correlation curve. Finally, the remote sensing image data of the same month and different years are used to verify the results. The results show that the farther away the fault zone is from the Xing’an zone, the lower the surface temperature is, on the contrary, the closer the fault zone is, the higher the temperature.

Using the co-seismic response data from the DSQ water-tube tiltmeter and the VS vertical pendulum tiltmeter at the Ganzhou seismic center station in Jiangxi, we analyze the maximum response amplitude, the delay time and the continuous response time of the two instruments. The results show that: ① There is a positive correlation between the continuous response time and magnitude; ② There is a positive correlation between the delay time and epicenter distance; ③ Because of the differences of instruments design and observation principle, the recorded co-seismic response signals are different.

In recent years, Shuangwang well in Weinan has accumulated a large number of accurate and reliable fluid observation data, but the data has not been systematically cleaned and analyzed. We systematically sorted the digital observation data of underground fluid in Shuangwang well from the date of digital observation start to the end of 2021 (1 June 2007 to 31 December 2021). Taking the interference and pre-earthquake anomaly observation data of water level and water temperature observation of Shuangwang well as the research object, the changes of digital observation data were analyzed, and the shape of the curve under the interference and pre-earthquake anomaly was analyzed. Analysis was carried out from the aspects of trend change characteristics, characters of earth tide, coseismic variations, preseismic anomalies and typical interference anomalies, and the change characteristics of the underground fluid data of Shuangwang well were researched, and the information reflected in the observational data were summarized and applied. It will provide scientific basis for the study of water temperature and water level anomalies and earthquake prediction in Weinan and its surrounding areas in the future.

This article collects the co-seismic response changes of the temperature and water level of Jiangsu fluid wells during the M7.4 earthquake in Maduo, Qinghai, summarizes their characteristics, analyzes the influencing factors in combination with the basic parameters of Jiangsu’s underground fluid wells and regional geological structures, and explores the changing mechanisms. The results show that the impact of the M7.4 earthquake in Maduo, Qinghai on underground fluids in Jiangsu was relatively significant, and the recording ability of the water level’s co-seismic response was better than that of the temperature. The temperature mainly showed step changes, while the water level mainly showed oscillations and step changes. The fluid wells that exhibited co-seismic response changes were mainly concentrated near the Tanlu fault zone and Maoshan fault zone. The regional and concentrated step changes in water level indicate that stress adjustment has occurred in the area, which has some indicative significance for the future occurrence of earthquakes. The co-seismic response mechanism of water temperature is more complicated. The movement mode and flow rate of water, wellbore conditions, and probe position may all affect its changes. More data is needed from various aspects to make a more accurate judgment.