Vigny C., Socquet A., Peyrat S., Ruegg J. C., Metois M., Madariaga R., Morvan S., Lancieri M., Lacassin R., Campos J., Carrizo D., Bejar-Pizarro M., Barrientos S., Armijo R., Aranda C., Valderas-Bermejo M. C., Ortega I., Bondoux Francis, Baize S., Lyon-Caen H., Pavez A., Vilotte J. P., Bevis M., Brooks B., Smalley R., Parra H., Baez J. C., Blanco M., Cimbaro S., Kendrick E. (2011). The 2010 M-w 8.8 Maule megathrust earthquake of Central Chile, monitored by GPS. Science, 332 (6036), p. 1417-1421. ISSN 0036-8075.
Titre du document
The 2010 M-w 8.8 Maule megathrust earthquake of Central Chile, monitored by GPS
Année de publication
2011
Auteurs
Vigny C., Socquet A., Peyrat S., Ruegg J. C., Metois M., Madariaga R., Morvan S., Lancieri M., Lacassin R., Campos J., Carrizo D., Bejar-Pizarro M., Barrientos S., Armijo R., Aranda C., Valderas-Bermejo M. C., Ortega I., Bondoux Francis, Baize S., Lyon-Caen H., Pavez A., Vilotte J. P., Bevis M., Brooks B., Smalley R., Parra H., Baez J. C., Blanco M., Cimbaro S., Kendrick E.
Source
Science, 2011,
332 (6036), p. 1417-1421 ISSN 0036-8075
Large earthquakes produce crustal deformation that can be quantified by geodetic measurements, allowing for the determination of the slip distribution on the fault. We used data from Global Positioning System (GPS) networks in Central Chile to infer the static deformation and the kinematics of the 2010 moment magnitude (M-w) 8.8 Maule megathrust earthquake. From elastic modeling, we found a total rupture length of similar to 500 kilometers where slip (up to 15 meters) concentrated on two main asperities situated on both sides of the epicenter. We found that rupture reached shallow depths, probably extending up to the trench. Resolvable afterslip occurred in regions of low coseismic slip. The low-frequency hypocenter is relocated 40 kilometers southwest of initial estimates. Rupture propagated bilaterally at about 3.1 kilometers per second, with possible but not fully resolved velocity variations.
Plan de classement
Géophysique interne [066]
Localisation
Fonds IRD [F B010053605]
Identifiant IRD
fdi:010053605
