Landslides induced by a low magnitude seismic sequence at continental interiors: a case study of the Santa Rosa Canyon,northeastern Mexico |
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| Authors: | Jorge A Salinas-Jasso Juan C Montalvo-Arrieta Eduardo Reinoso-Angulo |
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| Institution: | 1.Universidad Autonoma de Nuevo León, Facultad de Ciencias de la Tierra,Linares,México;2.Universidad Nacional Autónoma de México, Instituto de Ingeniería, Ciudad Universitaria,Ciudad de México,México |
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| Abstract: | Landslides caused by a low magnitude earthquake swarm (2.8?≤?M?≤?3.6) in 2012 were documented at the Santa Rosa Canyon in northeastern Mexico. Disrupted landslides from falls and slides, in both rocks and soils, were identified based on fieldwork and high-resolution satellite imagery along stream banks from natural cliffs and along the road cut in the epicentral area. Most of the landslides occurred on slopes greater than 40°, where geological features played a key role in triggering slope instabilities. The maximum distance limit for disrupted slides from the epicentral area was 7 km. The area affected by landslides during the early stage of the seismic sequence (July through August 2012) was 90 km2. Landslide identification was limited in some areas by the resolution of the satellite imagery and dense cloud coverage. Both the epicentral distance and the area affected by landslides are above the global bounds reported in literature. The final landslide inventory is the first documented case of earthquake-induced landslides in northeastern Mexico. |
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