简介:【摘要】为探讨“9•5”泸定6.8级地震地质灾害发育特征,结合“9•5”泸定6.8级地震的实际情况,分析了地震地质灾害发育的特征,并提出地震地质灾害防治的建议。分析结果表明,地震是一种常见的地质灾害,对区域社会经济的发展,以及居民生命和财产都会构成严重威胁。全面分析地震地质灾害发育特征,有利于制定出更加科学合理的地震灾害防治建议和措施,从而降低地震地质灾害造成的影响,提升应对地震灾害的能力。
简介:BasedonthedigitalwaveformdatarecordedbyXinjiangDigitalSeismicNetworkfortheXinyuan-HejingM_L6.8earthquakesequencesofJune30,2012,thispaperanalyzesthestressdropsofearthquakesequencesandthecorrelationcoefficientsoffocalmechanismssignificantforstrongaftershocks.Firstly,thesourceparametersoftheXinyuan-HejingM_L6.8earthquakesequencesareobtainedbyapplyingthespectrumanalysisandtheBrunessourcemodel.Then,thecorrelationcoefficientsofspectralamplitudesarecalculatedusingthelow-frequencyspectralamplituderecordedbythesamestationforthedifferentevents.Finally,basedontheresultsofthecorrelationcoefficientsofspectralamplitudes,theeventswithsimilarfocalmechanismsaregroupedusingtheclusteringmethod.Theresultsshowthat:(1)Thestressdropvaluesshowasteadytrendintheaftershocksequencecalmperiodandthestressdropvaluesshowarise-fallinstrongaftershocks.(2)Themovingaveragecorrelationcoefficientofamplitudespectrumbeginstospreadafterthemainshock.Itshowsthatthecorrelationdecreasesbetweenthemainshockandtheaftershocksinmechanisms.(3)Theresultsoffocalmechanismgroupsshowthattheearthquakesequencesaremainlystrikeslips.ThestressdistributionofthemainpressureaxisisnearlyNS,whichisthesameasthestructuralstressfield.(4)Themagnitudeandmechanismshowthatthereisanagreementbeforethestrongaftershock,whichshowsthattheregionalstressfieldisenhanced.
简介:介绍了2011年9月18日印度锡金邦6.8级地震对中国西藏定结县房屋破坏的特征,分析了定结县各类房屋建筑的震害特征及其破坏原因,并对该地区房屋的防震减灾工作提出了建议。
简介:据国家发展和改革委员会网站消息,有关方面数据显示,1-4月,全国煤炭产量10.1亿吨,同比下降6.8%,铁路煤炭发运6.2亿吨,同比下降10.4%。
简介: