2018, 40(s1):1-5. DOI: 10.3969/j.issn.1000-0844.2018.Supp.001
Abstract:The Wenchuan earthquake of 2008 has brought great disaster and loss of treasure to Sichuan and Gansu provinces, leaving valuable experience and lessons, as well as a profound warning. In the post-disaster reconstruction, in consideration of both the characteristics of the disaster and the current local economy, questions of how to scientifically formulate a reconstruction planning system while simultaneously innovating the reconstruction model and management mechanism are of paramount importance. Accelerating the rate of progress is a fundamental guarantee of a high-quality reconstruction. Improvements in the quality of life of affected residents, including vigorous economic recovery and revitalization and the promotion of social harmony and stability, are also critical. It is also critical to scientifically factor potential future earthquake risks into the reconstruction, to prevent and minimize earthquake loss through practical and feasible earthquake mitigation measures. This article summarizes the earthquake hazard in Gansu Province caused by the Wenchuan earthquake of ten years ago. Based on the restoration and reconstruction work in the disaster areas, we expound upon the principles and characteristics of the reconstruction planning system. From the perspectives of innovation, the strengthening of social management, the development of supporting policies, the improvement of fundamental capacities, and the prevention of disaster risks, this article analyzes and summarizes the main post-disaster reconstruction and its results. The results reflect the improvements the national and local governments have made in adhering to scientific principles, democratic rule, and rule in accordance with the laws of a service-oriented government of the people. This paper also provides important experience and information regarding reconstruction of many types of natural disaster sites.
2018, 40(s1):6-17. DOI: 10.3969/j.issn.1000-0844.2018.Supp.006
Abstract:The accurate determination of focal mechanism solutions and focal depths of earthquakes in a certain area is related to the correct understanding of some important problems such as source physical process, fault structure, stress field action, and plate motion. In this paper, the focal mechanism solutions and the best focal depths of ML4.0~6.0 earthquakes that occurred during 2008-2015 in Sichuan area are calculated using the broadband waveform data of Sichuan seismic network and the cut and paste (CAP) method. On this basis, the spatial distribution characteristics of the focal mechanism solutions and focal depths are discussed.
WANG Jingbo , CHAI Wenrui , YANG Hongjing
2018, 40(s1):18-21,39. DOI: 10.3969/j.issn.1000-0844.2018.Supp.018
Abstract:On September 12, 2018, an MS5.3 earthquake with a focal depth of 11 km occurred in Ningqiang County, Shaanxi Province (32.75°N, 105.69°E). In this work, Ningqiang County and its surrounding areas (within the radius of 420 km) were taken as the study areas. Data from seven geomagnetic stations located in Hanzhong, Zhouzhilou, Qianling, Jingyang, Chengdu, Tianshui, and Lanzhou were processed and analyzed by using the loading-unloading response ratio method of the geomagnetic Z component. Results showed that high values of abnormal changes in the load-unloading response ratio P(Z) had a strong correspondence with the Ningqiang MS5.3 earthquake. The results of this study can provide a basis for mid-short term earthquake prediction in the future. Meanwhile, the application of the loading-unloading response ratio method in earthquake prediction warrants further promotion and testing.
AN Haijing , NIU Yanping , MA Kexing , LIANG Haodong
2018, 40(s1):22-34. DOI: 10.3969/j.issn.1000-0844.2018.Supp.022
Abstract:In this paper, the data and seismic examples of the deep-well geo-electrical resistivity experiments in Gansu province in recent years are introduced, and SA scheme (vertical observation scheme of single-hole deep well in Gansu) is proven to have better earthquake precursor detection efficiency. The mechanism and principle of the scheme is explained from the perspective of horizontal layered medium, and the prediction efficiencies of various installations are quantitatively estimated. The analysis holds that SA is the best approach to solve the electromagnetic interference problem, in order to improve the precursor detection efficiency of installations.
YIN Haiquan , XU Yujian , XU Dongzhuo , WANG Shengwen , WANG Ning , ZHANG Zhenwei , WANG Shijin
2018, 40(s1):35-39. DOI: 10.3969/j.issn.1000-0844.2018.Supp.035
Abstract:According to the urgency of earthquake forecasting in our country and the superiority of cross-fault deformation monitoring in short-term prediction, the shortcomings of the monitoring network layouts of current cross-fault deformations were found. Through surface-line-point me-thod, a method for optimizing the cross-fault monitoring network layout is presented in this paper. Based on the background research of regional seismic activity and active fault systems, detailed segmentation and activity analysis of the relevant faults are carried out. By assessing the results from the effective monitoring of existing observation sites and active fault investigation, an optimization scheme for cross-fault monitoring site is finally obtained.
ZHAN Hui , LIANG Quanqiang , LI Guangming , LIN Zhibin , LIN Shubing , LIN Hongjie
2018, 40(s1):40-44. DOI: 10.3969/j.issn.1000-0844.2018.Supp.040
Abstract:In this paper, we use the horizontal velocity field data from 30 GPS seismic monitoring stations around Changle-Zhaoan fault from 2011 to 2016 and a negative dislocation model to invert for the slip rate and fault locking of Changle-Zhaoan fault. In addition, the rationality of the result is tested by comparisons with the earthquake distribution in recent years. The inversion results show that the southeast Fujian block shows left-lateral movement relative to the east Fujian block. The locking fraction of the southern and northern segments of the Changle-Zhaoan fault is higher than that of the middle segment at the same depth. The southern segment is tightly locked from surface to a depth of 5 km (locking fraction is 0.99), and the northern segment is tightly locked from surface to a depth of 10 km, and the fault gradually turns from locking to creeping between 25 km and 30 km. The inversion results are consistent with the distribution of historical earthquakes around the fault.
NILUPAER Maimaitusun , ZHANG Xiaotao , ZHANG Yongxian , XIA Caiyun
2018, 40(s1):45-52. DOI: 10.3969/j.issn.1000-0844.2018.Supp.045
Abstract:Pattern informatics (PI) method is an earthquake prediction method based on statistical physics, which has been an active research area in recent years. This method can help to determine whether the seismicity in a grid during a time period deviates from its history and from the average state of the selected study region. In this paper, earthquakes above MS6.0 during 1994-2014 in the Tianshan seismic zone are retrospectively analyzed with the PI method. The results show that (1) most of the studied earthquakes occurred in the seismic regions (hotspots); (2) six earthquakes above MS6.5 have obvious continuous evolution process; (3) the PI method results in reasonable medium and long term prediction of MS ≥ 6.0 earthquakes in the Tianshan seismic zone.
2018, 40(s1):53-58,89. DOI: 10.3969/j.issn.1000-0844.2018.Supp.053
Abstract:Here, the recent movement characteristics in Tianjin area are analyzed by velocity field and time series results obtained based on the latest GPS observation data and the regional strain time series. The results show that (1) the velocity field in Tianjin area during 2013-2017 is lower than that of the surrounding area, and the horizontal motion is relatively weak; (2) GPS stations in Tianjin area move southeastward at a steady speed; the GPS stations in northern Tianjin rise at a steady rate, and those in southern Tianjin descend at a stable rate; (3) the regional strain in the study area accumulates at a steady rate, with no obvious change.
LIU Xingyun , FAN Zhuzi , CHEN Yang , XU Donghong
2018, 40(s1):59-64. DOI: 10.3969/j.issn.1000-0844.2018.Supp.059
Abstract:Ya'an city, located in the mid-southern section of the north-south seismic belt of China, is the site of the intersection of the Longmenshan, Xianshuihe, and Anninghe faults, with a history of strong seismic activity. For decades, research on earthquake monitoring and forecasting in Ya'an city has developed. This work attempts to extract information, showing a relationship between the possible precursory anomalies before an earthquake and the occurrence of an earthquake, from high-precision ground temperature data recorded by the Institute of Geology, China Earthquake Agency. Our study shows that a sudden change in bedrock ground temperature reflects a physical adjustment taking place in the bedrock. This adjustment can be shown in a variety of ways, not only in temperature change, but also in seismic activity. Therefore, we compared the ground temperature data with the seismic activities in the same region through different modalities, and found that there are earthquake cases within a certain range of the measuring points after high-precision ground temperature data changes.
REN Dong , GUO Anning , ZHANG Weichao , DUAN Boru , JIA Yuanyuan , QIANG Mei
2018, 40(s1):65-69. DOI: 10.3969/j.issn.1000-0844.2018.Supp.065
Abstract:The textual research and protection of historical seismic data is a basic job in natural disaster reduction. In 2012, the remaining cards in the Compilation of Chinese Historical Earthquake Data were arranged by Institute of History, CASS, and the textual research on the content of those cards were carried out. In this work, 40 500 cards, which record more than 6 070 000 words of historical seismic data, are introduced, and the value and meaning of the recorded historical seismic data are described. Future more, the preliminary arrangement and research on the data is also explained.
SUN Yi , ZHANG Jianzhi , Dai Aopeng , SUN Yin , HU Zhongmin
2018, 40(s1):70-75. DOI: 10.3969/j.issn.1000-0844.2018.Supp.070
Abstract:Incorporating the one-dimensional seismic response analysis method of site soils, four historic earthquake observation records and one typical artificial fitting wave were selected for analysis, i.e., the Loma Prieta M6.9 earthquake of 1989, the Northridge M6.6 earthquake of 1994, the Wenchuan M8.0 earthquake of 2008, the Minxian M6.6 earthquake of 2013, and the artificial fitting ground motion in Puyang city. The influences of input seismic waves with high and low frequency characteristics on the response spectra of the design ground motions were studied. The results showed that, as compared with the artificial fitting wave consisting mainly of low-frequency components, the input seismic waves consisting mainly of high frequency components had the effect of centralized amplification in a short period. The possible explanation could be that the input seismic waves with high frequency characteristics will cause a certain resonance effect on the sites having a short inherent period. The research results could provide some reference for the study of earthquake resistance building protection.
JIANG Zhijie , PENG Yanju , LÜ Yuejun , HUANG Shuai , HUANG Yahong , XIU Liwei
2018, 40(s1):76-82. DOI: 10.3969/j.issn.1000-0844.2018.Supp.076
Abstract:In earthquake engineering, the equivalent shear-wave velocity to a depth of 30 m below ground surface (vS30) is a significant parameter in evaluating site conditions. In many cases, however, because of the restrictions of objective conditions, shallow shear-wave velocity profiles do not extend to a depth of 30 m; therefore, it is important to find a better way to estimate vS30. The development of vS30 estimation model is comprehensively introduced in this paper. First, three models (bottom-layer constant velocity model, velocity gradient model, and the extrapolation model with the travel-time averaged shear-wave velocities at two different depths) based on logging data are discussed, and then a vS30 estimation model based on some proxies and an estimation model based on horizontal-to-vertical spectral ratio response are described. Considering the characteristics and applicability of the involved estimation models, the use of vS30 model in modern earthquake engineering is simply described.
SHEN Fanglü , LI Pei , ZHANG Ying , REN Congrong , HUANG Zonglin
2018, 40(s1):83-89. DOI: 10.3969/j.issn.1000-0844.2018.Supp.083
Abstract:The shear-wave velocity of soils is an important soil dynamic parameter in geotechnical engineering investigation and earthquake engineering. First, the data of 7 562 actual shear-wave velocity samples measured from 346 boreholes during the seismic safety evaluation of engineering sites in Fuzhou were collected and analyzed. Then, using three statistical models i.e., quadratic polynomials with one unknown, exponential equation, and linear equation, the respective empirical relationships between shear-wave velocity and depths of eight typical soil types in Fuzhou downtown area were obtained. The results show that there is an obvious relationship between the shear-wave velocity and depth of soils except cobble soil, and the applicability of one of two quadratic polynomials is superior. This research can be used as a reference for sites where shear-wave velocities are not tested in Fuzhou downtown area.
CHEN Yao , ZHANG Yu , WANG Yingda , CAO Lingling , ZHENG Weiping , FENG Jian'gang
2018, 40(s1):90-94. DOI: 10.3969/j.issn.1000-0844.2018.Supp.090
Abstract:During the Nepal M8.1 earthquake on April 25, 2015, abundant co-seismic responses were recorded by many underground fluid stations in China. The underground fluid data observed in Gansu area had co-seismic responses of different degrees as well. In this paper, the co-seismic variation characteristics and response ability of digital water level and water temperature in Gansu area during the earthquake are analyzed. It is found that the co-seismic responses were recorded by six wells (seven measurement items). The co-seismic responses of water level have consistent variation characteristics. The co-seismic responses of water temperature were recorded by only two wells, and the recovery time after earthquake is relatively long.
ZHAO Xiaohe , GONG Xusheng , YAN Wanxiao , FAN Xiaoyi , NING Bin , LU Shuangling
2018, 40(s1):95-100,152. DOI: 10.3969/j.issn.1000-0844.2018.Supp.095
Abstract:The factors affecting the observation quality of the borehole volume strain meters at two stations along the same fault zone in Shandong Province were analyzed and discussed. The two stations are under the same meteorological conditions and are at similar geographical positions. Results revealed the following information. (1) The data of two stations conformed completely to the accuracy index required in the specifications. The relative error of the M2 wave tidal factor was δα/α ≤ 0.05. The average monthly accuracy of Xianggongzhuang Station in 2016 was 0.015 1 and was higher than that of Malingshan Station, which had a monthly average accuracy of 0.032 1. (2) The two stations were affected by rainfall, water level, and air pressure, and the correlation degree between volume strain and air pressure exceeded 0.85. (3) Both stations are located at or near the fault zone. In addition to instruments and other interference factors, borehole condition is the major factor that accounted for the lower precision of Malingshan Station than that of Xianggongzhuang Station.
GUO Mingrui , HU Jiuchang , WU Jialin , GUO Yuqin , WANG Guidan , WANG Xijiao
2018, 40(s1):101-104. DOI: 10.3969/j.issn.1000-0844.2018.Supp.101
Abstract:On October 20, 2016, an earthquake of magnitude 4.4 occurred in Sheyang County, Yancheng City, Jiangsu Province. Before the earthquake, the "double low-points" anomaly in daily variation of vertical geomagnetic component was observed in some magnetic observatories in East China. The period of low points on both sides of the dividing line was more than 2 hours. Some scholars have found that the occurrence of geomagnetic "double low-points" is related to the generation and occurrence of earthquakes.
JIA Xinye , DAI Yong , GAO Lixin , LU Yingzhe , JIA Yanjie
2018, 40(s1):105-111. DOI: 10.3969/j.issn.1000-0844.2018.Supp.105
Abstract:Geomagnetic low-point displacement anomalies occurred in North China from January 11 to 24, 2010, and the Hejin M4.8 earthquake occurred in the study area on January 24, 2010, after the ending of the anomalies. In this paper, the longitudinal effect of low-point time is removed by subtracting theoretical low-point time from measured low-point time, and the isoline whose low-point time is 0 h after removing the longitudinal effect is used as the low-point displacement boundary. The epicenter of Hejin M4.8 earthquake is located at the boundary of geomagnetic low-point time on January 16, 17, 19, and 22. The gradient value is used to describe the spatial distribution characteristics of low-point time. During the abnormal dates, there appears high gradient area in North China, whose gradient are greater than 1 h/(°), and the Hejin M4.8 earthquake is generally located at the edge of the high gradient area.
ZHANG Yingjie , JIANG Yongjian , LI Xiaopeng , ZHAO Changjiang
2018, 40(s1):112-116. DOI: 10.3969/j.issn.1000-0844.2018.Supp.112
Abstract:The extensometer at Shexian seismic station has been running for 10 years. In this work, we used Nakai and Venedikov harmonic analytical methods to analyze the data obtained by the extensometer over the period of 2010 to 2017. Results demonstrated that the data quality was good. The quality of the south-north component was better than that of east-west component, and the values of the tidal factors of the two components were both far greater than 1. The variation in tidal factors might be related to stress accumulation and release. Thus, the anomaly of tidal factors is valuable for earthquake prediction.
HE Yingwen , YUE Chong , LI Zhirong , YANG Jianwen , QI Yingping
2018, 40(s1):117-122. DOI: 10.3969/j.issn.1000-0844.2018.Supp.117
Abstract:In this study, the environmental change parameters and related rock mechanics parameters around the observation cave in Yunxian County were collected and sorted, and an irregular load model was used to simulate and calculate the tilt changes caused by the load change. The results show that the unloading change induced by the excavation of Aihua tunnel construction has a certain influence on the observation of DSQ tiltmeter at the Yunxian seismic station. The tilt changes of NS and EW directions are 147.332 004 5×10-3" and 108.560 424 3×10-3", respectively, which are of the same order of the actual tilt observed in 2017 (186×10-3" and 150×10-3", respectively). The results indicate that the load change has a certain influence on the tilt changes in the NS and EW directions as well as on the abnormal decrease of tilt changes in 2017.
ZHU Shengchu , WANG Hengzhi , ZHAN Xiaoyan
2018, 40(s1):123-128. DOI: 10.3969/j.issn.1000-0844.2018.Supp.123
Abstract:The characteristics of the strong motion records of the Sheyang M4.4 earthquake that occurred on October 20, 2016 in Jiangsu Province were analyzed. Comparing the data predicted by using the ShakMap regression formula with the actual observed data revealed that the actual observed data were higher than the predicted data. Analyzing the acceleration response spectra of strong motion records showed that the earthquake exerted negligible effects on buildings in the epicentral area. The methods of data bias correction, site effect analysis, and spatial interpolation were used to draw the contour map of ground motions. This multimethod approach enhanced the rationality of the spatial expression of the contour map. Finally, intensity distribution and instrumental intensity in the epicentral area were discussed in combination with the results of field survey and damage assessment.
HUO Zhuqing , QU Min , LU Yong , SUN Yejun
2018, 40(s1):129-133. DOI: 10.3969/j.issn.1000-0844.2018.Supp.129
Abstract:The M4.9 earthquake which occurred at 20:11 in July 20, 2012, at the junction of Gaoyou and Baoying in Jiangsu Province is the largest and the most influential earthquake in Jiangsu in recent years. Based on the travel time difference equation of sPn and Pn waves, we calculate the focal depth of the M4.9 earthquake as 15 km, and the calculated depth by both double-difference location and Jiangsu network catalog is 17 km. The different location results are very close; thus, we believe that the focal depth of main shock is about 15-17 km.
DU Yao , RUAN Xiang , WANG Yuwei , SHAO Yuping , JING Sheng , ZHENG Zhao
2018, 40(s1):134-145. DOI: 10.3969/j.issn.1000-0844.2018.Supp.134
Abstract:Based on the monitoring data of reservoir earthquake observation network, the accurate location of seismic activity before the water storage of Changheba reservoir is presented in this paper, and the space-time distribution characteristics of the earthquakes are analyzed. Using the waveform cross-correlation technique and the phase observation reports of some earthquakes, the accurate location results of 444 earthquakes are obtained using the double-difference location method. The results of time distribution analysis and satellite image analysis clearly show that three highly concentrated seismic clusters distributed near the dam are the quarry blasting events during the reservoir construction; there is no seismic cluster distribution near the water storage area in the upper reaches of the reservoir dam, and the main earthquake clusters are distributed from the southwest of the dam to the Xianshuihe fault zone. In addition, the occurrence features of seven small faults in the earthquake concentrated area are given.
BI Bo , WANG Peng , ZHU Peiyu , ZHAO Junxiang
2018, 40(s1):146-152. DOI: 10.3969/j.issn.1000-0844.2018.Supp.146
Abstract:To ensure the normal operation of equipment in a seismic network, a rapid and effective fault response and exclusion is crucial. The development and design of a monitoring app on a mobile terminal is of great practical value. In this paper, an app is developed using JAVA in Android operating system for the seismic network of Earthquake Administration of Shanghai Municipality. Through the app, the management system can realize various functions, such as the real-time push of important information and fault removal.
QUAN Jianjun , CHEN Meimei , LAI Jianshen , ZHENG Yongtong , ZHENG Zhihong , LIN Huiqing , FANG Chuanji , LI Jiyu
2018, 40(s1):153-162. DOI: 10.3969/j.issn.1000-0844.2018.Supp.153
Abstract:To ensure the reliability, stability, and continuity of seismic monitoring data as well as the normal operation of seismic monitoring instruments at unattended seismic stations, a system is developed in this study using a sensing technology and embedded technology, as well as a powerful microprocessor and stable, safe embedded GPRS/GSM modules and other equipment. Using this system, functions such as environment monitoring and remote controlling can be realized in an unattended station. The unattended station is interrupted by an alternating current or an abnormal synchronous digital hierarchy (SDH) link, and the monitoring system can alarm and remind the maintenance personnel; this benefits both the supervisor in charge of the station environment and the seismic equipment. In addition, the system can also respond to the client instructions, complete an outage and restart of the station instruments, and monitor of the equipment working environment. The system will send an alarm information to the client the instant it detects abnormal cases, such as fire, theft, and change in the temperature and humidity, which is of great significance to improve the stability of the technical system as well as the stability and continuity of the output data.
HUANG Rengui , XIAO Jian , LI Yuze , ZHAO Ying , TAO Xin , ZHOU Hongyan , LIU Yaowei , HUANG Fan
2018, 40(s1):163-169. DOI: 10.3969/j.issn.1000-0844.2018.Supp.163
Abstract:The design concept and construction content of a seismic emanometer measurement platform, the first testing platform for a seismological fluid subject, are introduced in the paper. The design of the platform calibration unit agrees with the technical requirements of JJG825-2013 Verification Regulation of the Radon Measuring Instruments. The measurement range of radon concentration is 800~15 000 Bq/m3, and the expanded uncertainty reaches 8% (k=2). The detection unit can test the performance and evaluate the quality of the new R & D instruments and the reinspection instruments. When of the whole platform is designed, it will meet the calibration requirements of more than 300 radon observatories in the earthquake radon observation network, and will be used for performance testing in 30~50 sets of radon observatories per year to ensure the quality of radon observation in the earthquake industry.
SUN Luqiang , LIU Lei , BIAN Zhenfu , XU He
2018, 40(s1):170-173,196. DOI: 10.3969/j.issn.1000-0844.2018.Supp.170
Abstract:The Earthquake Agency of Tianjin Municipality realized a seismic data transmission network by constructing a digital seismological observation network. The seismic waveform data is real-time stored in the AWS data server, and users can call the data from the AWS server by a man-machine interface system. Therefore, the seismic system operation generates load in the server hardware and software, thus affecting the system overall efficiency. In this study, we use a Python-based algorithm of time series to predict the disk capacity of the AWS server and estimate the load rate of the storage server, thus avoiding the occurrence of system paralysis because of storage capacity depletion. The real-time data of stations can also be monitored by the algorithm, and variation curves of station data can be accordingly generated.
SUN Yanping , CHEN Wenkai , ZHANG Suping , XU Qin
2018, 40(s1):174-179. DOI: 10.3969/j.issn.1000-0844.2018.Supp.174
Abstract:The density of village settlements is obtained by Kernel density estimation method, and then a 1 000 m×1 000 m grid map of Gansu population density is obtained based on the settlements density. Taking a Ⅵ degree area of Jiuzhaigou, Sichuan MS7.0 earthquake in Gansu Province as an example, the grid population data and statistical unit population data are overlaid to obtain estimates of earthquake-affected population corresponding with ArcGIS. The results show that the affected population estimate method based on kilometer grid avoids the data allocation error caused by administrative division, and can express the population distribution in the administrative unit, thus ensuring the practicality and effectiveness of the disaster rapid assessment.
LIU Xiaodan , WANG Yaru , GUAN Hengyu , WEI Yanxu , LIU Long , MA Xudong , LIU Jiajia
2018, 40(s1):180-185. DOI: 10.3969/j.issn.1000-0844.2018.Supp.180
Abstract:The 2020 Winter Olympics will be held in Chongli district, Zhangjiakou City. To further understand the safety and seismic performance of buildings in rural Chongli, Zhangjiakou, on-site investigations and statistics were conducted on 3 353 buildings in the area, which mainly included surveys on the relevant aspects of the building structure, construction age, and seismic structure. The relationship between the types of rural housing structures and the corresponding geographical location of villages and towns was analyzed, the seismic performance and safety of different types of structures were summarized. In this paper, the measures and countermeasures for earthquake prevention and disaster reduction for buildings in Chongli district are presented, which can provide references for improving the earthquake resistance of rural buildings.
HUANG Yang , YANG Fan , ZUO Tianhui
2018, 40(s1):186-189. DOI: 10.3969/j.issn.1000-0844.2018.Supp.186
Abstract:In the rapid assessment of post-earthquake economic losses, the rapid assessment method which combines the macroscopic vulnerability model with the macroeconomic indicator (GDP) is often used. The method has been efficiently used for many years and is relatively sophisticated. In this study, we use this method in combination with the fifth generation of the seismic ground motion parameter zonation map of China to rapidly assess the earthquake disaster losses in Hebei Province, aiming to provide some references for future rapid assessments of post-earthquake economic losses.
XU Nian , LI Wei , YANG Yun , YIN Hongsheng , XIAO Fei , DU Hang
2018, 40(s1):190-196. DOI: 10.3969/j.issn.1000-0844.2018.Supp.190
Abstract:Manual monitoring satellite stations require much time and efforts for operation, and they are associated with low frequencies; therefore, an intelligent monitoring and early warning system of fixed satellite communication earth stations is proposed in this paper. The system can monitor the working status of satellite stations in real time, and the duty log can be automatically generated. This is not only convenient to the duty staff, but also effectively solves the problems of inaccurate, untimely, and costly manual monitoring. This study can lead to an improvement of earthquake emergency rescue.
FANG Weihua , ZHOU Lanjie , ZHENG Shaopeng , LI Wenhui
2018, 40(s1):197-204. DOI: 10.3969/j.issn.1000-0844.2018.Supp.197
Abstract:In this paper, the design of the data processing system of a simple seismic intensity meter network in Fujian Province is presented. Through the Zabbix open-source monitoring tool, a real-time monitoring and automatic processing system of current seismic activities is designed and implemented. We utilize the Earthworm platform for the data processing and a simple configuration of Palert seismic intensity meter system. The system can realize an intelligent monitoring and automatic processing of the network and effectively ensure continuous reporting of the seismic activities in the network.
LI Gang , CHEN Shuxin , ZHAO Hongzhuang , ZHANG Ying , LI Yonghong , DING Jing
2018, 40(s1):205-213. DOI: 10.3969/j.issn.1000-0844.2018.Supp.205
Abstract:The full-flow analysis of network security is an important approach for new-generation network security protection. This approach can detect attacks from multiple angles, all directions, and repeated backtracking. It can find known and unknown security threats, i.e. fault host, vulnerability exploitation, advanced Trojan horse communication, APT attacks, and data theft. It can also locate and obtain evidence of network attacks and help users improve safety analysis and response. This work introduced the design, construction, and application of a seismic network safety full-flow monitoring system. It also described the importance and practical necessity of full-flow monitoring systems for network security protection. In addition, it provided an important reference for the security protection of large-scale information network systems.
ZHANG Hui , DONG Min , MA Juan , LIU Yinghao , LIU Kai
2018, 40(s1):214-218. DOI: 10.3969/j.issn.1000-0844.2018.Supp.214
Abstract:In this paper, the actual exploitation situation of deep confined water in Changyi district, Shandong Province is studied, and the relationship between the deep groundwater exploitation and land subsidence in the study area is analyzed in detail. It is found that the control water level of deep confined water is not only the data for controlling water level, but also the reasonable range of water level fluctuation. With the developments in science and technology and the improvement of management level, the fluctuation range of water level can be adjusted timely. In formulating the control water level in plain areas, it should be detailed to each county or township, and the overall control and adjustment should be timely performed.
2018, 40(s1):223-227. DOI: 10.3969/j.issn.1000-0844.2018.Supp.223
Abstract:
2018, 40(s1):228-232,235. DOI: 10.3969/j.issn.1000-0844.2018.Supp.228
Abstract:In this work, the earthquake consultation held by the Advisory Committee for Predicting Earthquakes in China during 2004-2014, and the written prediction opinion reported to the China Earthquake Agency and the National Assembly for Earthquake Tendency are reviewed and summarized (focus on M ≥ 7.0 earthquakes), in the hope of serving as a reference for future forecasting work.
2018, 40(s1):233-235. DOI: 10.3969/j.issn.1000-0844.2018.Supp.233
Abstract:This study summarizes the key forecasting work of Guo Zengjian from over 14 years with the Special Committee for Predicting Natural Disasters of the Chinese Geophysical Society affiliated with the Lanzhou Institute of Seismology, CEA to 2008.
2018, 40(s1):236-238. DOI: 10.3969/j.issn.1000-0844.2018.Supp.236
Abstract:This work explains the analysis process in the prediction of two earthquakes in 2007 combining the rhythm of multiplied nine days in different years and the double magnetic storm time method. The actual earthquake cases prove once again that the combination method has practical value in impending earthquake prediction, but needs further research in the future.
GUO Anning , REN Dong , BAI Xuejian , ZHAO Chengcheng , LI Xin , ZHANG Weichao , GUO Zhiyu , PENG Lishun , JIA Yuanyuan , DUAN Boru
2018, 40(s1):242-250. DOI: 10.3969/j.issn.1000-0844.2018.Supp.242
Abstract:Based on six topics, this paper briefly introduces the academic contributions and achievements of Guo Zengjian and some co-authors in the fields of geophysics, earthquake prediction science, comprehensive forecast of natural disaster, and earthquake disaster prevention and emergency rescue. In addition, a special commentary is made on Guo Zengjian's forecasting methods, as his forecasting thoughts, theories, and methods are an independent prediction system, and still have important value in present forecasting practices.
2018, 40(s1):251-252. DOI: 10.3969/j.issn.1000-0844.2018.Supp.251
Abstract:
Sopyright:China Earthquake Engineering Journal