强潮汐激发地震火山活动的新证据
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摘要
强潮汐与火山地震活动密切相关 .天文资料表明 ,2 0 0 0年 6月到 8月日本Izu半岛最活跃的火山地震活动正好处于天文大潮时期和日长变化最小值时期 .在厄尔尼诺事件和拉尼娜事件发生前后 ,东西太平洋海面高度分别升降 4 0cm ,水均衡作用使洋壳反向升降 13cm .由此形成的东西太平洋地壳跷跷板运动加强了强潮汐对地震火山活动的激发作用
At the end of June in 2000, volcanic and seismic events started at the Izu islands south to Tokyo. Following the events, extraordinary crustal deformation was observed around the Izue islands. Until the end of August, both the volcanic and seismic activities were high. It is suggested that the crustal deformation was caused by a dyke intrusion event at the Izu islands and associated with strong tides. A tidal model triggering earthquakes and volcanoes is proposed based on the observational data and calculation results. Before and after the El Nino event and La Nina event, the oceanic water in East Pacific Ocean and West Pacific Ocean may rise or fall 60cm oppositely, which make the oceanic crust fall or rise 20cm. It is the reason that the El Nino events and La Nina events are interrelated with the earthquakes and volcanoes. This phenomenon is just like "see-saw" motion. Strong tide and El Nino are the excitation condition of earthquakes and volcanoes activities.
At the end of June in 2000, volcanic and seismic events started at the Izu islands south to Tokyo. Following the events, extraordinary crustal deformation was observed around the Izue islands. Until the end of August, both the volcanic and seismic activities were high. It is suggested that the crustal deformation was caused by a dyke intrusion event at the Izu islands and associated with strong tides. A tidal model triggering earthquakes and volcanoes is proposed based on the observational data and calculation results. Before and after the El Nino event and La Nina event, the oceanic water in East Pacific Ocean and West Pacific Ocean may rise or fall 60cm oppositely, which make the oceanic crust fall or rise 20cm. It is the reason that the El Nino events and La Nina events are interrelated with the earthquakes and volcanoes. This phenomenon is just like "see-saw" motion. Strong tide and El Nino are the excitation condition of earthquakes and volcanoes activities.
引文
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[3] 杨学祥.2001年发生厄尔尼诺事件的天文条件.地球物理学报,2002,45(增刊):56～61YANGXX .TheastronomicalconditionofElNinoin2001.ChineseJ.Geophys.(inChinese),2002,45(Suppl.):56～61
[4] 杨学祥.大洋地壳的跷跷板现象.科学技术与工程.2003,3(1):28～29YANGXX .Seesawphenomenoninoceaniccrust.ScientificTechno logyandEngineering(inChinese),2003,3(1):28～29
[5] 韩延本,李志安,赵 娟.由地球自转的年际变化预测厄尔尼诺事件.地球物理学进展,2000,15(3):112～114HanYB ,LiZA ,ZhaoJ.UsingthevariationoftheEarth’srotationtopredictElNino.ProgressinGeophysics(inChinese),2000,15(3):112～114
[6] 郑大伟,丁晓利,周永宏等.ElNino事件的前兆现象在日长和海平面观测中的反映.科学通报,2000,45(23):2572～2576ZhengDW ,DingXL ,ZhouYH ,etal.BordingofElNinoinobservationaldataofdaylengthchangingandsealevelchanging.ChineseScienceBulletin(inChinese),2000,45(23):2572～2576
[7] 杨学祥,术洪亮.环太平洋地震带与柯里奥利力.西北地震学报,1995,17(4):13～16YangXX ,ShuHL .CircumPacificseismicbeltandCoriolisforce.NorthwesternSeismologicalJournal(inChinese),1995,17(4):13～16
[8] 杨学祥,陈 震,陈殿友等.厄尔尼诺事件与强潮汐的对应关系.吉林大学学报(地球科学版),2003,33(1):87～91YangXX ,ChenZ ,ChenDY ,etal.TherelationbetweenElNinoeventsandstrongtides.JournalofJilinUniversity(EarthScienceEdition)(inChinese),2003,33(1):87～91
[9] 林振山,赵佩章,赵文桐.日食-厄尔尼诺系数及其应用.地球物理学报,1999,42(6):732～738LinZS ,ZhaoPZ ,ZhaoWT .ThesolareclipseElNinocoefficientsanditsapplication.ChineseJ .Geophys.(inChinese),1999,42(6):732～738
[10] 李宪之.亚太地区1991年春夏两季自然灾害的探讨.北京大学学报(自然科学版),1994,30(3):355～360LiXZ .InvestigationonthenaturalcatastropheintheAsianPacificregionsduringthespringandearlysummerof1991.ActaScientiarumNaturaliumUniversitatisPekinensis(inChinese),1994,30(3):355～360
[11] 张家诚,李文范等.地学基本数据手册.北京:海洋出版社,1986.186～196ZhangJC ,LiWF ,etal.TheBasicDataHandbookoftheEarthScience(inChinese).Beijing:OceanicPress,1986.186～196
[12] 国家地震局分析预报中心二室.一九八二年震情.地震,1983,(1):47～48SecondRoomoftheAnalysisandForecastCenter,ChinaSeismologi calBureau.Theearthquakesin1982.Earthquakes(inChinese),1983,(1):47～48
[13] WalkerDA .MoreevidenceindicateslinkbetweenElNinosandseis micity.EOS ,1995,76(4):33,34,36
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