2010 M8.8 Maule, Chile Earthquake LIDAR

The magnitude 8.8 February 27, 2010 Maule, Chile earthquake is one of the largest earthquakes to occur since 1900. Its effects were felt along 600km of Chilean coastline and while many structures and facilities performed well during the earthquake, some did not. In response, GEER (Geotechnical Extreme Events Reconnaissance) sent teams to document geotechnical effects of the disaster, and nine sites were further characterized with the aid of LIDAR by the Phase C GEER team. This team was led by Dr. Robert Kayen (U.S. Geological Survey & UCLA) and included Professor Scott Olson (University of Illinois), Dr. Lenart Gonzalez (Golder Assoc., Santiago, Chile), Sebastian Mauriera (Graduate Student, University of Chile) and Valentina Peredo (Undergraduate Student, University of Chile). The data analysis and animation renders of the LIDAR imagery were coordinated by Robert Kayen (rkayen@ucla.edu) with students Sean Cullenward (UCLA), and Ivan Estevez (CCNY).

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The full GEER Association Report can be found at: geerassociation.org/GEER_Post%20EQ%20Reports/Maule_Chile_2010/Ver2_Maule_Chile_2010_index.html

Las Palmas Mine

Las Palmas mine was operated from the early 1980’s until 1997. The mine was closed and the tailings
area partially covered with a thin layer of gravelly material. The profile seen at the upper failure scarp shows the gravelly cover layer and unsaturated tailings. Variable oxidation of the tailings has occurred with colours varying from tan to rusty in oxidized tailings to grey in unoxidized tailings. Clear evidence of liquefaction of the tailings with sand boils and ejecta along cracks indicating some portion of the tailings was saturated. Tailings flowed almost 0.5 kilometers.

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