Natural Hazards in El Salvador
Las Colinas landslide: Rapid and long-traveling soil flow caused by the January 13, 2001, El Salvador earthquake
Published:January 01, 2004
Kazuo Konagai, Jorgen Johansson, Paola Mayorca, Ryosuke Uzuoka, Tetsuro Yamamoto, Masakatsu Miyajima, Nelson Pulido, Kyoji Sassa, Hiroshi Fukuoka, Freddy Duran, 2004. "Las Colinas landslide: Rapid and long-traveling soil flow caused by the January 13, 2001, El Salvador earthquake", Natural Hazards in El Salvador, William I. Rose, Julian J. Bommer, Dina L. López, Michael J. Carr, Jon J. Major
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Two devastating earthquakes struck El Salvador within a month. The first quake of January 13, 2001, which was centered off El Salvador's southern coast, damaged or destroyed nearly 108,000 houses and killed at least 944 people. A considerable amount of soil (∼200,000 m3) was fluidized on a mountain ridge rising south behind the Las Colinas area of Nueva San Salvador (Santa Tecla). The average slope was at most ∼13°, and yet the fluidized soil flowed ∼400 m across the residential area, destroying many houses and killing more than 700 people. This report outlines the findings obtained through reconnaissance by a mission dispatched by the Japan Society of Civil Engineers and the laboratory tests that followed it.