Stress changes in the Costa Rica subduction zone due to the 1999 Mw=6.9 Quepos earthquake

Details Stress changes in the Costa Rica subduction zone due to the 1999 Mw=6.9 Quepos earthquake Stress changes in the Costa Rica subduction zone due to the 1999 Mw=6.9 Quepos earthquake

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005e%26psl.230...97b&link_type=abstract

Earth and Planetary Science Letters, Volume 230, Issue 1-2, p. 97-112.

Computer Science

3

Scientific paper

Stress changes after large earthquakes can trigger substantial seismicity along many fault systems. As subduction zones produce the majority of large earthquakes, it is essential to understand how significant earthquakes may affect stress conditions and aftershock locations. Calculations of stress changes due to large underthrusting earthquakes can be used to examine likely zones of triggered seismicity in subduction environments. However, associations between stress changes and locations of small aftershocks are typically difficult because of large errors on offshore aftershock locations based on land-based seismic observations. After the 1999 Quepos earthquake (Mw=6.9) in the subduction zone offshore Costa Rica, small magnitude earthquakes were located using a local onshore offshore temporary seismic network, providing a data set of high-quality aftershock locations. In light of these well-located aftershocks, we compute Coulomb stress changes for the 1999 Quepos earthquake for comparison. Our calculations show lobes of increased stress in regions coinciding with most of the small magnitude seismicity following the mainshock, as seen in many cases of large strike-slip earthquakes. Few small earthquakes occur in regions of decreased stress. Within three years, a large (Mw=6.4) earthquake occurred in this region, however based on this modeling, it does not appear that the 2002 earthquake occurred in a zone of stress increase from the 1999 event.

Affiliated with

Also associated with

No associations

Rating

Stress changes in the Costa Rica subduction zone due to the 1999 Mw=6.9 Quepos 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 Stress changes in the Costa Rica subduction zone due to the 1999 Mw=6.9 Quepos earthquake, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stress changes in the Costa Rica subduction zone due to the 1999 Mw=6.9 Quepos earthquake will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-898245