Land-level changes produced by the Mw 8.8 2010 Chilean earthquake.
We observed vertically displaced coastal and river markers after the 27 February 2010 Chilean earthquake [moment magnitude (Mw) 8.8]. Land-level changes range between 2.5 and -1 meters, evident along an approximately 500-kilometers-long segment identified here as the maximum length of coseismic rupture. A hinge line located 120 kilometers from the trench separates uplifted areas, to the west, from subsided regions. A simple elastic dislocation model fits these observations well; model parameters give a similar seismic moment to seismological estimates and suggest that most of the plate convergence since the 1835 great earthquake was elastically stored and then released during this event.
Farías
Marcelo
M
Departamento de Geología, Universidad de Chile, Plaza Ercilla 803, Santiago, Chile. mfarias@dgf.uchile.cl
Vargas
Gabriel
G
Tassara
Andrés
A
Carretier
Sébastien
S
Baize
Stéphane
S
Melnick
Daniel
D
Bataille
Klaus
K