预览加载中，请您耐心等待几秒...

全球与我国地震活动序列的时间序列分析(英文).docx

预览
1/2
2/2

在线预览结束，喜欢就下载吧，查找使用更方便

下载提示 文本预览

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

全球与我国地震活动序列的时间序列分析(英文) Seismicactivityisaphenomenonthathasintriguedmankindsinceancienttimes.EarthquakesaretheresultofasuddenreleaseofenergyintheEarth'scrust,andtheiroccurrenceandimpactareoftenunpredictable.Inrecentyears,therehasbeenanincreasinginterestinstudyingglobalandregionalseismicactivity,withtheaimofunderstandingtheunderlyingmechanismsandreducingtheriskofearthquake-relateddisasters.ThispaperaimstoanalyzethetimeseriesofseismicactivitygloballyandinChina,focusingonthetrendsandpatternsobservedinrecentyears. Globally,thespatialandtemporaldistributionofearthquakesishighlyuneven.Themajorityofearthquakesoccurattheboundariesoftectonicplates,wheretheplatesinteractandcreatestressthateventuallyleadstoarupture.Inparticular,thePacificRingofFireisknowntobeoneofthemostseismicallyactiveregionsintheworld,accountingforaround81%ofallearthquakesglobally.Inrecentyears,therehasbeenaslightincreaseinthenumberofearthquakesrecordedglobally.AccordingtodatafromtheUnitedStatesGeologicalSurvey(USGS),therewere17,088earthquakeswithamagnitudeof4.5orhigherin2017,comparedto16,590in2016. InChina,seismicactivityiscloselylinkedtothecountry'stectonicsettingandgeographiclocation.Thecountryislocatedinahighlyseismiczone,withmultipleactivefaultsystems.ThemostseismicallyactiveregionsaretheTibetanPlateau,theNorthChinaPlain,andtheSichuan-Yunnanregions.Inrecentyears,Chinahasexperiencedseveraldevastatingearthquakes,includingtheWenchuanearthquakein2008andtheYushuearthquakein2010.Theseeventshaveraisedpublicawarenessofearthquakeriskandtheimportanceofearthquakepreparedness.Ingeneral,therehasbeenadecreaseinthenumberofearthquakesinChinaoverthepastdecade.Forexample,thenumberofearthquakeswithamagnitudeof4.0orhigherdecreasedfrom13,522in2008to8,043in2017,accordingtodatafromtheChinaEarthquakeAdministration(CEA). TheanalysisoftimeseriesdataforseismicactivitygloballyandinChinarevealsseveraltrendsandpatterns.Firstly,thereisoverallstabilityintermsofseismicactivity.Althoughtherearevariationsinthenumberandintensityofearthqua