Development of Automatic Earthquake Quick Report in China

This paper summarizes the different stages of the development of earthquake automatic quick report in China. In early stage, scientists and technicians mainly focused on the realization of automatic identification of seismic phases and automatic positioning in the network data processing system. Then, at the end of the Tenth "Five-Year Plan" project, Fujian Earthquake Agency, Guangdong Earthquake Agency, and China Earthquake Networks Center have independently developed their earthquake automatic quick report systems. Later, by taking advantage of the "multi-channel comprehensive trigger" mechanism, China Earthquake Networks Center has innovated a comprehensive trigger system for automatic earthquake quick report, whereby earthquake information can be instantly reported and presented on Weibo, Wechat, and CENC App.     

应用近场速度记录快速估算川滇地区中强地震强度

采用Wu等(2004)提出的地震强度测定方法,应用近场速度波形记录,测定地震参数M_(ew),实现了川滇地区中强地震(M_W≥5.7)强度近实时快速测定。M_(ew)是一个与矩震级M_W对接的地震参数,与传统的应用振幅测定震级的方法相比,不会存在震级饱和问题,与全球矩心矩张量(GCMT)的矩震级M_W具有较好的一致性。该方法解决了应用近场波形资料和矩张量反演方法求取大地震矩震级比较困难的问题,可为区域中强地震速报提供近实时矩震级提供参考,从而提高地震速报的时效性和准确性,同时为强震加速度数据的应用奠定基础。     

乌鲁木齐遥测地震台网的速报定位

分析讨论了乌鲁木齐遥测地震台网在１９９３年９月～１９９５年１２月３１日期间速报的２１６次地震。认为乌鲁木齐遥测地震台网，对发生在乌鲁木齐地区的地震，在１０分钟内可给出定位结果，定位精度达Ｉ类，对发生在北疆地区的地震，在震后２０分钟内可给出定位结果，定位精度达Ⅱ，Ⅲ类；对南疆发生的地震，需用人工地震台站的资料进行交切定位，发生在国内（除新疆）和国外的地震，除墨西哥以南发生的地震定位效果不太理想外，其     

变形观测处理系统的研究

变形在自然界和工程中广泛存在,因此变形观测技术具有广泛的应用前景。本文结合工程实践,探索了一个变形观测处理系统(WX变形观测处理软件?WXDAS)的构架与实现,以及支撑其功能的关键技术,并通过两个实验分析了新系统的相关性能,对系统的功能、稳定性和应用前景进行了一定的研究。     

基于ArcGIS土地利用分析

ArcGIS已逐渐应用于社会各个领域,但借用ArcGIS进行土地利用分析的实例并不多见.本文从实际出发以泰安市部分地籍图为例阐述了利用现有地籍图进行土地利用分析的工作流程及分类方法,叙述了CAD到ArcGis数据转换过程及ArcGIS制作统计图、统计报告的相关内容。并结合实验结果提出实施土地合理利用政策应当注重推广土地集约利用策略,推进城乡一体化进程及竖立可持续发展的科学发展观,做好土地合理利用的规划工作。     

A kind of informationon short-term and imminent earthquake precursors-research on atmospheric electric field anomalies before earthquakes

Ａｋｉｎｄｏｆｉｎｆｏｒｍａｔｉｏｎｏｎｓｈｏｒｔｔｅｒｍａｎｄｉｍｍｉｎｅｎｔｅａｒｔｈｑｕａｋｅｐｒｅｃｕｒｓｏｒｓ—ｒｅｓｅａｒｃｈｏｎａｔｍｏｓｐｈｅｒｉｃｅｌｅｃｔｒｉｃｆｉｅｌｄａｎｏｍａｌｉｅｓｂｅｆｏｒｅｅａｒｔｈｑｕａｋｅｓＪＩ...     

A kind of information on short-term and imminent earthquake precursors—research on atmospheric electric field anomalies before earthquakes

The long-time practice of observational research on earthquake prediction has shown that the information on short-term and imminent earthquake precursors can hardly be detected, but it is very important for practical and effective earthquake prediction. The result of analysis and study in this paper has shown that the anomaly of quasi-static atmospheric electric field may be a kind of reliable information on short-term and imminent earthquake precursors. On such a basis, the 20 years’ continuous and reliable data of atmospheric electric field observed at the Baijiatuan seismic station are used to study the correlation between the anomalies in seismic activity and relative quiet periods bear on the occurrence of near earthquakes within 200 km range around Beijing after the Tangshan earthquake. The observational results recently reported before hand in written form and earthquakes that actually occurred in near field in corresponding time periods are compared and analyzed. The efficacy of these written prediction opinions about near earthquakes in the recent 10 years is tested. From the test results, the brilliant prospect that the anomaly of quasi-static atmospheric electric field may really become a reliable mark for making short-term and imminent earthquake predictions is discussed. Besides, as a preliminary step, some judgment indexes for predicting earthquakes by use of the observational data of atmospheric electric field before earthquakes are put forward. In the last part, it is pointed out that it would be possible to obtain more believable judgment indexes for determining the three elements of near earthquakes before greater earthquakes (M _S≥5) only if a relatively reasonable station network (2–4 stations every 10 000 km²) is deployed and further investigation is made. Contribution No. 97A0040, Institute of Geophysics, State Seismological Bureau, China. This subject is sponsored by Program No. 95-04-05-01-04, State Seismological Bureau, China.     

山区公路边坡水的防治探讨

水是边坡失稳的主要诱发因素之。地表水对土质边坡的影响主要是冲刷作用和渗透作用;地下水对边坡的作用主要表现在物理作用、力学作用以及化学作用三个方面。通过诸永高速公路公盂互通A匝道滑坡防治实例,计算出在考虑地下水的状态下,潜在滑坡HP边坡稳定系数K=0.900,边坡处于极限平衡状态,而在不考虑地下水的状态下,潜在滑坡HP边坡稳定系数K=1.345,边坡处尚于稳定状态。根据边坡的具体情况,提出应对边坡地表水及地下水进行有效的阻挡、疏导等预防措施。     

长治市气象台报务转发系统

在地市气象台向省气象台转发气象报文时，由于县局与市局报路时有不畅，且常有停电现象，使得传统的方法很烦琐，不符合时代发展的要求。为此．我们开发了《长治市气象台报务转发系统》。目前该系统已开发完成，本文主要介绍该系统的开发和主要功能。     

用EXCEL电子表格制作酸雨观测记录月报表

制作酸雨观测记录月报表是酸雨观测中的一项重要任务。随着计算机技术的快速发展，以及气象现代化建设的迅速推进，目前各气象观测台站均已配备了微机，气象业务微机化操作成为了现代气象的显著特征。为此，我们利用EXCEL实现了微机自动化处理酸雨观测记录月报表。该方法运行稳定，速度快，计算结果准确，符合酸雨观测规范的要求。