基于ISC、SCSN与CRN地震记录的地方时统计特征与频谱分析
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摘要
首先对ISC、SCSN与CRN地震目录进行地方时转换 ,并进行序列统计 ,建立了地方时地震时间频度分布 ,然后对地震地方时序列做了频谱分析 ,以提取地震序列中的特征周期成分 .地方时统计结果显示 :( 1 )地震频度在地方时 9时和 1 9时附近最低 ,0时和 1 3时附近最高 ;( 2 )存在以 1 2h和 2 4h为主的周期 ;( 3)较大地震和小地震有不同的活动规律 .频谱分析的结果表明 ,ISC、SCSN与CRN地震地方时序列除了存在 1 2h、2 4h等特征周期对应日潮和半日潮之外 ,还存在 1 1 7a、1a与 1 7 5a等的周期 ,分别对应太阳黑子的活动周期、地球公转及接近对应月球升交点的回归年 .
The ISC, SCSN and CRN seismic catalogue data are first transformed to the local time system and the sequence statistics are made, the time-occurring number of earthquakes are set up on the system of local time, and then the frequency spectrum analysis on the earthquake sequence is done to pick up information related to the characteristic period. The results indicate: (1) time-occurring number of earthquake is up to the maximum value at local time 0:00 AM and 1:00 PM while down to the minimum at local time 9:00 AM and 7:00 PM; (2) there are two typical periods of 12h and 24h; (3) The small earthquakes and large earthquakes are different in spatial and temporal distributions. The results of frequency spectrum analyses show that there are not only periods of 12h and 24h connected with the diurnal tide and the semidiurnal tide, respectively, but also the periods of 11.7a, 1a, and 17.5a connected with 11-year sunspot cycle, earth revolution, and nearly to ascending node tropical year of the moon, respectively.
The ISC, SCSN and CRN seismic catalogue data are first transformed to the local time system and the sequence statistics are made, the time-occurring number of earthquakes are set up on the system of local time, and then the frequency spectrum analysis on the earthquake sequence is done to pick up information related to the characteristic period. The results indicate: (1) time-occurring number of earthquake is up to the maximum value at local time 0:00 AM and 1:00 PM while down to the minimum at local time 9:00 AM and 7:00 PM; (2) there are two typical periods of 12h and 24h; (3) The small earthquakes and large earthquakes are different in spatial and temporal distributions. The results of frequency spectrum analyses show that there are not only periods of 12h and 24h connected with the diurnal tide and the semidiurnal tide, respectively, but also the periods of 11.7a, 1a, and 17.5a connected with 11-year sunspot cycle, earth revolution, and nearly to ascending node tropical year of the moon, respectively.
引文
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[15] WuXP ,MaoW ,HuangY .Astronocialtidesandearthquakes.ProgressinAstronomy,2001,19(1):40～46(inChinesewithEnglishabstract)
[16] HuangXY ,WeiDP ,ChenQF ,etal.Ananalysisonshort wavecomponentsoftheglobalstressfield.ActaSeismologicaSinica,2003,25(1):40～46(inChinesewithEnglishabstract)
[17] http: www.isc.ac.uk
[18] http: www.trinet.org scsn scsn.html
[5] 高 伟,刘浦雄,许绍燮,等地震与太阳、月亮位置的关系(二)———强震余震序列的某些时间特征地震学报,1996,18(3):333～339
[9] 杜品仁18.6年地震轮回及其成因初探地球物理学报,1994,37(3):362～369
[10] 杜品仁全球主要地震区中源和深源大地震的186年轮回地球物理学报,1996,37(3):327～335
[12] 万永革,吴忠良,周公威,等几次复杂地震中不同破裂事件之间的“应力触发”问题地震学报,2000,22(6):568～576
[15] 吴小平,冒 蔚,黄 雍天文潮汐与地震天文学进展,2001,19(1):45～54
[16] 黄玺瑛,魏东平,陈棋福,等全球观测应力场的短波分量分析地震学报,2003,25(1):40～46
[2] ShirleyJH .Shallowmoonquakesandlargeshallowearthquakes:atemporalcorrelation.Earth.Planet.Sci.Lett.,1985,76:241
[3] RobertEW ,WilliamHP .Strongcorrelationofmajorearthquakeswithsolid earthtidesinpartoftheeasternUnitedStates.Geology,1989,661～664
[4] LopesRMC ,MalinSRC ,MazzarellaA ,etal.Lunarandsolartriggeringofearthquakes.PhysicsoftheEarthandPlanetaryInteriors,1990,59:127～129
[5] GaoW ,LiuPX ,XuSX ,etal.TherelationshipsbetweenearthquakesandpositionsoftheSunandMoon(Ⅱ),sometemporalcharacteristicsofaftershocksequences.ActaSeismologicaSinica,1996,18(3):333～339(inChinese)
[6] SadehDS ,MeidavM .Searchforsideralperiodicityinearthquakeoccurrences.J .Geophys.Res.,1973,78(32):7709～7716
[7] PalumboA .LunarandsolartidalcomponentsintheoccurrenceofearthquakesinItaly.GeophysJRAstr.Soc.,1986,84:93～99
[8] JunzoK .Tides.earthquakesandvolcanoes.Science,2002,l297:348～349
[9] DuPR .186yearsseismiccycleandthepreliminaryexplorationforitscause.ActaGeophysicaSinica,1994,37(3):362～369(inChinesewithEnglishabstract)
[10] DuPR .186yearscyclesoflargeintermediateanddeepfocusearthquakesintheworld’smajorseismicregions.ActaGeophysicaSinica,1996,39(3):327～335(inChinesewithEnglishabstract)
[11] VidaleJE ,AgnewDC ,JohnstomMJS ,etal.AbsenceofearthquakecorrelationwithEarthtides:anindicationofhighpreseimicfaultstressrate.J .Geophys.Res.,1998,103:24567～24572
[12] WanYG ,WuZL ,ZhouGW ,etal.“Stresstriggering”betweendifferentruptureeventsinseveralearthquakes.ActaSeismologiaSinica,2000,22(6):568～576(inChinesewithEnglishabstract)
[13] BeelerNM ,LocknerDA .WhyearthquakescorrelateweaklywiththesolidEarthtides:effectsofperiodicstressontherateandprobabilityofearthquakeoccurrence.J .Geophys.Res.,2003,B108,doi:10.10292001JB001518
[14] AlonZ ,AllanMR .Staticstresstransferandearthquaketriggering:Nolowerthresholdinsight?J .Geophys.Res.,2000,105(B6):13631～13642
[15] WuXP ,MaoW ,HuangY .Astronocialtidesandearthquakes.ProgressinAstronomy,2001,19(1):40～46(inChinesewithEnglishabstract)
[16] HuangXY ,WeiDP ,ChenQF ,etal.Ananalysisonshort wavecomponentsoftheglobalstressfield.ActaSeismologicaSinica,2003,25(1):40～46(inChinesewithEnglishabstract)
[17] http: www.isc.ac.uk
[18] http: www.trinet.org scsn scsn.html
[5] 高 伟,刘浦雄,许绍燮,等地震与太阳、月亮位置的关系(二)———强震余震序列的某些时间特征地震学报,1996,18(3):333～339
[9] 杜品仁18.6年地震轮回及其成因初探地球物理学报,1994,37(3):362～369
[10] 杜品仁全球主要地震区中源和深源大地震的186年轮回地球物理学报,1996,37(3):327～335
[12] 万永革,吴忠良,周公威,等几次复杂地震中不同破裂事件之间的“应力触发”问题地震学报,2000,22(6):568～576
[15] 吴小平,冒 蔚,黄 雍天文潮汐与地震天文学进展,2001,19(1):45～54
[16] 黄玺瑛,魏东平,陈棋福,等全球观测应力场的短波分量分析地震学报,2003,25(1):40～46
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