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基于曲面断层结构的2007年所罗门群岛地震同震滑动分布反演
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作者 孔英楠 孙海燕 陈庭 《测绘地理信息》 CSCD 2021年第3期42-46,共5页
2007年4月1日,南太平洋岛国所罗门群岛的俯冲带地区发生了Mw 8.1级地震。利用日本宇宙航空研究开发机构(Japan Aerospace Exploration Agency, JAXA)的ALOS/PALSAR卫星雷达影像数据,采用二通差分干涉技术获得了覆盖所罗门群岛地震震区... 2007年4月1日,南太平洋岛国所罗门群岛的俯冲带地区发生了Mw 8.1级地震。利用日本宇宙航空研究开发机构(Japan Aerospace Exploration Agency, JAXA)的ALOS/PALSAR卫星雷达影像数据,采用二通差分干涉技术获得了覆盖所罗门群岛地震震区的同震地表形变场,根据四叉树方法对原始观测数据进行降采样,利用弹性半空间三角形位错模型进行断层几何参数反演;并结合断层深度剖分图的特征,构建更为合理的上下两个不同倾角连接的断层面模型,通过提出的断层剖分技术确定了最佳同震滑动分布模型。为了测试断层倾角的最佳估计,对不同断层倾角进行测试,对比合成孔径雷达干涉测量(interferometic synthetic aperture radar, InSAR)技术获取的同震观测数据和不同模型预测的InSAR干涉图,发现上下断层面倾角分别为10°和23°的模型更为合理。据此模型得到该断层同震滑动分布主要发生在距地表40 km深度范围内;最大同震滑移量为5.227 m,深度为2 km。 展开更多
关键词 所罗门地震 合成孔径雷达干涉测量(interferometic synthetic aperture radar InSAR) 断层自动剖分技术 同震滑动分布反演
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Sea Level Variation at Western Coast of Mexican Pacific in Response to Tsunamigenic Earthquakes (2012-2015)
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作者 Rom~in Rodolfo Vera-Mendoza Modesto Ortiz-Figueroa 《Journal of Shipping and Ocean Engineering》 2015年第6期318-326,共9页
Tsunamis in Mexico are a real threat, still unknown to many, mainly by people living in or visiting the coast. The Tsunami Warning Center in Mexico recently created (September 19, 2011) monitors earthquakes and sea ... Tsunamis in Mexico are a real threat, still unknown to many, mainly by people living in or visiting the coast. The Tsunami Warning Center in Mexico recently created (September 19, 2011) monitors earthquakes and sea level change caused by these same. Sea level on the west coast of the Mexican Pacific was analyzed after the occurrence of local, regional and distant earthquakes, in order to determine the existence of an anomaly due to the quake itself. Variations in sea level due to local registered earthquakes Mw 6.0 to 7.4 range was from 0.10 to 0.30 m; for regional earthquakes of Mw 7.3 and 8.2 were 0.12 and 0.22 m respectively and to the distant earthquake of Mw 8.0 recorded in Solomon Islands, the change in sea level of the maximum recorded was 0.20 m in Manzanillo, Colima. It is important to know that earthquakes whether local, regional or distant whose magnitudes are in the range specified here, did not present a risk to the Mexican coast, but do not rely, having to monitor variations in sea level that earthquakes can produce and be aware that you may perhaps occur as a tsunami in Indonesia in 2004 or Japan in 2011. 展开更多
关键词 Sea level Mexican Pacific tsunamis earthquakes.
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