Lineament analysis as a seismic precursor:The El Mayor Cucapah earthquake of April 4,2010(MW7.2),Baja California,Mexico  

作　　者：Rosendo Romero-Andrade Manuel E.Trejo-Soto Karan Nayak Daniel Hernández-Andrade Naccieli Bojorquez-Pacheco 

机构地区：[1]Faculty of Earth and Space Sciences,Autonomous University of Sinaloa,80013,Culiacan Rosales,Sinaloa,Mexico

出　　处：《Geodesy and Geodynamics》2023年第2期121-129,共9页大地测量与地球动力学（英文版）

基　　金：funded by CONACyT(Consejo Nacional de Ciencia y Tecnología);Autonomous University of Sinaloa,in Mexico,grant number CVU:429125。

摘　　要：An earthquake called the MW7.2“El Mayor Cucapah”earthquake on April 4,2010 has been analyzed for seismic precursor.The changes in the lineament system concerning its pattern and time intervals were analyzed during the earthquake preparation period and occurrence using the automated lineament detection method.The Landsat 5 TM images were processed using LESSA and ADALGEO software obtaining similar results.The statistical analysis revealed the stress accumulation due to plate interaction during earthquake formation.The study shows that the number of extracted lineaments changes rapidly about 23 months before the earthquake,and the systems return to the initial stage after 23 months.Most lineaments coincide with the extension of the San Andreas Fault as NW direction is the dominant trend.Thus,it can be concluded that the featural changes within the Rose diagram corresponding to the different strokes direction along with oriented elongation lines as disclosed in the present study using satellite images could be identified as a mid-term and/or short-term precursors of the earthquake.However,even though the dynamism of the El Mayor Cucapah earthquake is found in the extracted lineaments,it is possible to isolate more significant earthquakes even if new ones appear near the zone.Moreover,using two algorithms for lineament detection allows for the tectonics to corroborate the obtained lineaments and dynamism.

关 键 词：Lineament analysis EARTHQUAKE Landsat images Seismic precursor 

分 类 号：P315.72[天文地球—地震学]