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Migration of seismicity and earthquake interactions monitored by GPS in SE Asia triple junction: Sulawesi, Indonesia
- Source :
- Journal of Geophysical Research: Solid Earth. 107:ETG 7-1
- Publication Year :
- 2002
- Publisher :
- American Geophysical Union (AGU), 2002.
-
Abstract
- [1] Global Positioning System (GPS) measurements made in Sulawesi, Indonesia, from 1992 to 1999 detected coseismic and transient postseismic deformation related to the 1 January 1996, Mw = 7.9 earthquake on the North Sulawesi (Minahassa) trench. These motions are superimposed on the long-term secular motion (40 mm/yr) of the left-lateral Palu fault in central Sulawesi and continued for about 1.5–2 years. Following the earthquake, a string of earthquakes (of magnitude >6) migrated along the Minahassa trench, from west to east. Subsequently, two earthquakes of magnitude >6 occurred on or near the Palu fault migrating toward the south. Modeling the increase in Coulomb stress generated by the successive earthquakes agrees with the hypothesis of interacting events. An unclamping effect, possibly due to fluid migration in the Palu area, is also suggested by the stress computations and the detected (GPS) displacements.
- Subjects :
- Atmospheric Science
geography
Focal mechanism
geography.geographical_feature_category
Ecology
Triple junction
Seismotectonics
Paleontology
Soil Science
Magnitude (mathematics)
Forestry
Aquatic Science
Fault (geology)
Induced seismicity
Oceanography
Geophysics
Space and Planetary Science
Geochemistry and Petrology
Earth and Planetary Sciences (miscellaneous)
Far East
Geology
Seismology
Aftershock
Earth-Surface Processes
Water Science and Technology
Subjects
Details
- ISSN :
- 01480227
- Volume :
- 107
- Database :
- OpenAIRE
- Journal :
- Journal of Geophysical Research: Solid Earth
- Accession number :
- edsair.doi...........c3a0ebb70e8a62f35909b90d5a528203