Source parameters of the Mw = 6.3 Aroma crustal earthquake of July 24, 2001 (northern Chile), and its aftershock sequence - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Journal of South American Earth Sciences Année : 2007

Source parameters of the Mw = 6.3 Aroma crustal earthquake of July 24, 2001 (northern Chile), and its aftershock sequence

Résumé

The July 24, 2001, Mw = 6.3 earthquake in Aroma, Chile, is one of the few moderately shallow earthquakes to occur recently in northern Chile. This study uses different seismological data (short-period, broadband, strong-motion) to locate the event and its corresponding aftershocks. In addition, it carefully constrains the focal depth using SP phase and the focal mechanism of the main-shock. Finally, a model of the strong-motion waveforms discriminates the activated fault plane among the two nodal planes. The main-shock fault plane solution obtained from the strong-motion analysis is (strike, dip, rake) = (14° ± 10°, 53° ± 15°, −163° ± 15°), which indicates a right-lateral motion on an inclined fault, in agreement with the aftershock distribution, which also indicates a fault striking N14°E and dipping about 50°E.

Dates et versions

hal-00407770 , version 1 (27-07-2009)

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Denis Legrand, B. Delouis, L. Dorbath, C. David, J. Campos, et al.. Source parameters of the Mw = 6.3 Aroma crustal earthquake of July 24, 2001 (northern Chile), and its aftershock sequence. Journal of South American Earth Sciences, 2007, 24 (1), pp.58-68. ⟨10.1016/j.jsames.2007.02.004⟩. ⟨hal-00407770⟩
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