Coulomb stress changes in the South Iceland Seismic Zone due to two

largest earthquakes for 88 years in June 2000, with a MS = 6.6 event on June 17, followed by another MS = 6.6 earthquake on June 21. These events occurred on two parallel N-S striking, right-lateral strike slip faults, separated by about 17 km. We calculate the static Coulomb stress change for the J...

Full description

Bibliographic Details
Main Authors: Rikke Pedersen, Gunnar B. Gudmundsson
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Published: 2000
Subjects:
1242 Geodesy and Gravity
Seismic deformations (7205
7209 Seismology
Earthquake dynamics and mechanics
7215 Seismology
Earthquake parameters
7230 Seismology
Seismicity and seismotectonics
7260 Seismology
Theory and
Iceland
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.461.2381
http://www.norvol.hi.is/~rikke/Arnadottir_et_al_GRL03.pdf
Description
Summary:largest earthquakes for 88 years in June 2000, with a MS = 6.6 event on June 17, followed by another MS = 6.6 earthquake on June 21. These events occurred on two parallel N-S striking, right-lateral strike slip faults, separated by about 17 km. We calculate the static Coulomb stress change for the June 17 and 21 earthquakes using a distributed slip model derived from joint inversion of InSAR and GPS data. We find that the static stress change caused by the June 17 event is about 0.1 MPa at the location of the June 21 hypocenter, promoting failure on the second fault. Locations of aftershocks agree well with areas of increased Coulomb failure stress. Our calculations indicate that positive stress changes due to the two earthquakes make the area west of the June 21 rupture the most likely site of the next large earthquake in South Iceland. INDEX TERMS:

Similar Items