The crustal micro-deformation anomaly and the credible precursor*-中国期刊网

摘要 WhatisacredibleseismicprecursorinobservationofdeformationArealseismicprecursoroughttoberesultedfromthevariationsintheearthstrainandstress.Thedeformationobservationcanprovidetheinformationduringearthquakegestationandoccurrenceperiodforus.Usuallytheseismicprecursorscanbedividedintofieldandepicentralregionprecursors.Theprecursorinformationisveryusefulforseismicpredictionfromepicentralregionornearepicentralregion.Micro-deformationobservationmainlyincludestilt,strainandgravityobservation.ComparedwithGPS,geodesyandmobiledeformationobservation,micro-deformation(tilt,strain)showsthechangeofdeformationwhichiscontinualinalimitedvolumewithdominantobservedrangeof10(6~10(10m.Becausethevariationofthecrustalnatureandcrackingcanbedirectlyobtainedbymicro-deformationobservation,itisaneffectivewaytofindmiddle-shorttermandshort-termprecursor.

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The crustal micro-deformation anomaly and the credible precursor*

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The crustal micro-deformation anomaly and the credible precursor*

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