跨断层的定点地壳形变研究及发展前景
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摘要
新世纪内 ,在空间测地技术发展的同时、在现代地壳形变的监测和研究工作中 ,传统的大地测量方法仍具有不可替代的作用。全自动激光测量方法 ( EDM)将是常规的跨断层定点地壳形变监测技术主要的发展方向。日本学者在 2 0世纪 90年代前后发展起来的中距离EDM观测台获得了良好的成果。台湾花莲跨花东断层的 EDM观测台揭示了 9.2 1大地震有明显的中期和短临前兆。实践证明 ,这种方法不仅在成果质量和观测精度上可以和 GPS相对比 ,而且具有造价低廉 ,技术普及以及可操作性强的优点。
In the new century,while the spatial geodetic techniques are rapidly developing,traditional geodetic methods can not be totally replaced by them in present crustal deformation monitoring and study.The method of Auto Electronic Distance Measurement (EDM) will be the main development way for common fixed point crustal deformation monitoring of cross faults.Better results have been obtained by moderate ditstance EDM station developed by Japanese scholars in the 1990's.Obvious medium term,short term and imminent precusory anomalies were revealed by the EDM station situated in Hualian and cross Huadong faults in the Taiwan region.It has been proved that the method of EDM not only can be compared with GPS in result quality and observational accuracy ,but also it has the advantages of low price,popular technology and easy operation .
In the new century,while the spatial geodetic techniques are rapidly developing,traditional geodetic methods can not be totally replaced by them in present crustal deformation monitoring and study.The method of Auto Electronic Distance Measurement (EDM) will be the main development way for common fixed point crustal deformation monitoring of cross faults.Better results have been obtained by moderate ditstance EDM station developed by Japanese scholars in the 1990's.Obvious medium term,short term and imminent precusory anomalies were revealed by the EDM station situated in Hualian and cross Huadong faults in the Taiwan region.It has been proved that the method of EDM not only can be compared with GPS in result quality and observational accuracy ,but also it has the advantages of low price,popular technology and easy operation .
引文
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5 恒石幸正 .台湾大地震速报 .科学 ,1999- 11
2 储文宜 .地形变观测资料干扰因素研究 .华北地震科学 ,1987,5(增刊 ) :2 83～ 2 91
3 谢觉民 ,王若柏 ,李延兴 .板缘地震地壳形变前兆一例 .地震地质 ,1996 ,18( 3) :2 12～ 2 14
4 王若柏 ,李延兴 ,郭良迁 ,谢觉民 .日本伊豆半岛东部震群活动的地形变监测 .大地形变测量 ,1998,( 14 ) 3/4:10～ 16
5 恒石幸正 .台湾大地震速报 .科学 ,1999- 11
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