Kinematic and spontaneous rupture models of the 2005 Tarapacá intermediate depth earthquake

Details Kinematic and spontaneous rupture models of the 2005 Tarapacá intermediate depth earthquake Kinematic and spontaneous rupture models of the 2005 Tarapacá intermediate depth earthquake

Apr 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010geoji.181..369p&link_type=abstract

Geophysical Journal International, Volume 181, Issue 1, pp. 369-381.

Astronomy and Astrophysics

Astronomy

2

Earthquake Dynamics, Earthquake Ground Motions, Earthquake Source Observations, Seismicity And Tectonics, Subduction Zone Processes, Intraplate Processes

Scientific paper

The 2005 June 13, an intraplate, intermediate depth earthquake (Mw = 7.8, 98 km depth) occurred in northern Chile. Previous studies show that this earthquake is a slab-pull event with down dip extensional source mechanism. However, the physical origin and the role in seismic cycle of this kind of event are still under debate. We present a seismological source study from strong motion data, based on the simplified slip patch kinematic parametrization. We find two distinct sources. The main source is almost centred around the hypocentre and triggers the secondary one, situated deeper in the slab. The weaknesses and uncertainties of the kinematic models are partly resolved and discussed by constructing dynamic spontaneous rupture models with two radiative asperities and one embedding zone of non-radiative slip process, a required feature to fulfil the seismic moment constraint. Two kinds of models are compatible with observations: a crack mode model (combined with fast rupture velocity and small zone of non-radiative slip) and a pulse mode model (combined with slower rupture velocity and large zone of non-radiative slip). The fast rupture model is preferred for its physical simplicity. Replacing our result in the geometry and thermal contexts of the subduction, we conclude that the rupture has probably broken the whole lithosphere by encountering little resistance and without being very sensitive to the presence of the double seismic zone. This suggests that the rupture happens along a weak plane, on which large slab instabilities can take place.

Affiliated with

Also associated with

No associations

Rating

Kinematic and spontaneous rupture models of the 2005 Tarapacá intermediate depth earthquake does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Kinematic and spontaneous rupture models of the 2005 Tarapacá intermediate depth earthquake, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Kinematic and spontaneous rupture models of the 2005 Tarapacá intermediate depth earthquake will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1315228