共查询到20条相似文献,搜索用时 46 毫秒
1.
2.
3.
三峡重庆库区数字遥测台网地震监测能力评估 总被引:3,自引:0,他引:3
三峡重庆库区数字遥测地震台网由27个子台组成,全部采用速度记录方式。我们根据测试记录的数据,用速度震级公式ML=lg(AV/2πf) R(△),对各子台不同震级所能控制的距离进行了计算,得到台网不同震级地震的监测范围。台网基本上能够测定巫山至奉节段的ML≥1.2地震活动,同时能够测定一般地区的ML=1.8地震活动。 相似文献
4.
通过搜集辽宁地震台网1997~2004年8个台站记录的ML≥2.5地震观测资料,结合前期工作,对岫岩5.4级地震前后地震波特征进行了分析。结果表明:在岫岩5.4级地震前,P波初动、P波和S波振幅比、小震综合节面解及岫岩ML≥4.0地震震源机制解等同时出现明显的变化。 相似文献
5.
福建地区平均波速比的测定及初步分析 总被引:2,自引:0,他引:2
选取福建地震台网“十五”观测系统正式运行以来记录的2009-2012年的ML≥2.0级地震事件,根据断裂构造特征和地震的空间分布情况,将研究区域划分为3个地区。采用多台和达法计算波速比研究了福建地区的波速比和泊松比分布情况,并且讨论了2012年4月15日福建仙游ML4.1级地震前后的波速比变化特征。 相似文献
6.
根据苏北测震台网地面台站和深井台站记录的地震波形资料,分析2009年10月以来台网附近 ML ≥2.8地震波频谱特性。分析可知:地面记录与井下记录的地震波频谱特性存在一定差异,地面记录地震波拐角频率较井下约大0.28 Hz,地震波峰值频率比井下约小0.22 Hz;对于ML >4.5地震,地面记录地震波的优势频率范围小于井下记录;地震矩和矩震级地面台站记录数值较大,差值分别为3.104×10^14 N·m 和0.32级。 相似文献
7.
山东数字遥测地震台网地震监测能力评估 总被引:3,自引:0,他引:3
根据地震仪器的性能对山东数字遥测地震台网的监测能力进行评估,并利用2000年3-10月地震资料进行了检验。其结果为:山东地区12%的面积监测能力为ML≥2.0级,山东中部及渤海、黄河沿海地区监测能力为ML≥2.5级,渤海、黄海近海地区的监测能力为ML≥3.0级。最后指出台网布局的疏密程度、观测条件及台基条件的优劣等是影响台网监控能力的重要因素。 相似文献
8.
选用福建地震台网“十五”观测系统运行以来记录的ML≥1.0地震资料,对测定的速度震级和仿真震级进行了震级偏差统计分析,初步得出两种震级偏差值及相关系数,并分析了震级差异形成原因,为福建地震台网震级的测定提供参考。 相似文献
9.
对新疆测震台网数字化记录中的宁夏ML4.4爆破记录进行了分析,新疆台网大部分台站都能记录到上千公里ML4.0以上的工业爆破。又对新疆巴里坤地震台记录的约1200km的宁夏ML3.8、内蒙ML4.2地震和宁夏ML4.4的工业爆破记录进行了分析,发现近距离爆破记录的特征大部分可以在远距离爆破中找到。 相似文献
10.
辽宁遥测数字地震台网的技术系统 总被引:3,自引:3,他引:3
1 台网概况辽宁遥测数字地震台网 (下称辽宁台网 )是在原沈阳遥测地震台网的基础上进行数字化改造而建成的。台网由设在沈阳的台网中心、分布在辽宁省内的 4个中继站和 1 5个遥测数字地震台站组成 ,主要采用港震公司提供的设备和软件 ,根据实际需要 ,台网又自行研制了一些硬件设备和应用软件 ,对整个系统进行了完善和补充 ,整个系统采用了先进的数字地震观测技术 ,具有宽频带、大动态、高分辨率等特点。辽宁台网承担着省内 ML≥ 2 .5、责任区内 ML≥ 5.0、国外 MS≥ 7.0地震的速报任务 ;同时承担着编制辽宁省地震目录及地震观测报告 ,并… 相似文献
11.
12.
13.
George W. Housner 《地震工程与工程振动(英文版)》2008,7(2):I0001-I0001
Destructive earthquakes have caused great damage in China and the United States and collapsing buildings havecaused many deaths and injuries. The field of earthquake engineering studies earthquake hazards, the occurrence ofearthquakes of various magnitudes, the nature of the ground shaking during an earthquake, the vibration of structuresduring earthquakes, the strengthening of existing structures and the design of new structures to be earthquake resistant,and finally, how to cope with earthquake damage and restore a city to normal functioning. Such efforts are in progressin both countries, but unfortunately, the language barrier interferes with the free flow of information between China andthe Untied States. It would be mutually beneficial if some means could be developed to promote the exchangeof information across the Pacific Ocean. This new journal has been established for this purpose and its success willbe an important step in promoting earthquake engineering in China and the United States. 相似文献
14.
M. N. French R. L. Bras W. F. Krajewski 《Stochastic Environmental Research and Risk Assessment (SERRA)》1992,6(1):27-45
A procedure for short-term rainfall forecasting in real-time is developed and a study of the role of sampling on forecast ability is conducted. Ground level rainfall fields are forecasted using a stochastic space-time rainfall model in state-space form. Updating of the rainfall field in real-time is accomplished using a distributed parameter Kalman filter to optimally combine measurement information and forecast model estimates. The influence of sampling density on forecast accuracy is evaluated using a series of a simulated rainfall events generated with the same stochastic rainfall model. Sampling was conducted at five different network spatial densities. The results quantify the influence of sampling network density on real-time rainfall field forecasting. Statistical analyses of the rainfall field residuals illustrate improvement in one hour lead time forecasts at higher measurement densities. 相似文献
17.
JianCheng Shi 《中国科学:地球科学(英文版)》2014,57(10):2281-2282
正Global Change includes climate change and other environmental changes caused by the joint interaction among various layers of Earth. From the positive side, global change provides new opportunities to human and other living forms on Earth. In the meantime, it creates tremendous challenges and negative impact. At present, the negative impacts have reached all primary processes of the global ecosystem and every aspect of human society, especially causing degradation of the ecosystem. For instance, intensive deforestation causes decline of biodiversity; global warming causes sea level rise and increases 相似文献
18.
《国际泥沙研究》2014,(4)
正President:Giampaolo Di Silvio,Italy Vice Presidents:Ulrich C.E.Zanke,Germany Zhao-yin Wang,China The World Association for Sedimentation and Erosion Research(WASER),inaugurated on Oct.19,2004,is an independent non-governmental,non-profit organization.The mission of WASER is to promote international co-operation on the study 相似文献
19.
《地震工程与工程振动(英文版)》2014,(4)
正This journal is established by the Institute of Engineering Mechanics(IEM),China Earthquake Administration,to promote scientific exchange between Chinese and foreign scientists and engineers so as to improve the theory and practice of earthquake hazards mitigation,preparedness,and recovery.To accomplish this purpose,the journal aims to attract a balanced number of papers between Chinese and 相似文献