Tectonic settings of the 2015 M w 8.3 Coquimbo, Chile earthquake and its implications on megathrust earthquakes

Citation:

Hongfeng Yang, Jian LIN, Jiuxun Yin, and Huajian Yao. 2015. “Tectonic settings of the 2015 M w 8.3 Coquimbo, Chile earthquake and its implications on megathrust earthquakes.” Chinese Science Bulletin, 60, 36, Pp. 3549–3556.

Abstract:

The 2015 Mw8.3 Coquimbo, Chile earthquake is a typical megathrust earthquake, whose size and coseismic slip distribution are consistent with the interseismic locking model that was derived from GPS measurements. Our preliminary back-projection results show that the rupture of the Mw8.3 Coquimbo earthquake propagates updip from the hypocenter (~25 km in depth). Furthermore, we find frequency-dependent behavior of the radiation power of the rupture, similar to those observed during the 2010 Mw8.8 Maule earthquake, which occurred ~50 km to the south of the 2015 earthquake rupture area. These observations indicate that there is a systematic downdip variation of properties on the megathrust in southern Chile. The rich observations of the coseismic slip distributions of the 2015 Mw8.3 earthquake provide an excellent opportunity to validate numerical simulations of rupture process based on interseismic locking distributions.
Last updated on 07/02/2018