TY - JOUR
T1 - Migration of seismicity and earthquake interactions monitored by GPS in SE Asia triple junction: Sulawesi, Indonesia
AU - Vigny, Christophe
AU - Perfettini, Hugo
AU - Walpersdorf, Andrea
AU - Lemoine, Anne
AU - Simons, Wim
AU - val Loon, Danny
AU - Ambrosius, Boudewijn
AU - Stevens, Colleen
AU - Mc Caffrey, Rob
AU - Morgan, Peter
AU - Bock, Yehuda
AU - Subarya, Cecep
AU - Manurung, Parluhutan
AU - Kahar, Joenil
AU - Abidin, Hasanuddin
AU - Abu, Samad
PY - 2002
Y1 - 2002
N2 - [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
AB - [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
U2 - 10.1029/2001JB000377
DO - 10.1029/2001JB000377
M3 - Article
SN - 0148-0227
VL - 107
SP - 2231
EP - 2241
JO - Journal of Geophysical Research
JF - Journal of Geophysical Research
IS - B10
ER -