Magnitude 6.3 earthquake near Sulawesi coast, Indonesia

Magnitude 6.3 earthquake near Sulawesi coast, Indonesia

Magnitude 6.3 earthquake hit Gorontalo Minahasa, Sulawesi in Indonesia today at 07:52:11 UTC (15:52:12 Local time). Epicenter was 68 km (42 miles) South of TenggaraGorontalo, Sulawesi and 260 km (161 miles) Southwest of Manado, Sulawesi, Indonesia (0.010°N, 123.027°E).

EMSC recorded 6.1 magnitude with depth of 165km, USGS recorded 6.0 magnitude with depth of 156.1 km (97.0 miles), GeoScience Australia recorded 6.3 magnitude with depth of 200km, same as ASEAN EIC with depth of 142km. Local seismologic institutes recorded magnitude 6.3. Considering the depth of epicenter this earthquake is not so dangerous. There were no tsunami alerts issued and no reports of damage or injuries.

Sulawesi is at the junction of three major tectonic plates, Eurasia to the west, Pacific to the East and Australia to the South. Its peculiar K-shape reflects a Late Cretaceous- Recent history of subduction and multiple collisions, followed by Miocene and younger extension (Bone Basin, Gorontalo Basin) and strike-slip faulting.

The tectonics of Sulawesi today is dominated by a few large sinistral strike-slip fault zones (Palu-Koro, Matano and Malili-Kendari). These faults accommodate the NW relative movements of parts of Sulawesi due to the continued convergence of Pacific, Australian and Eurasian Plates after the M Miocene collision of the Bangai-Sula microcontinent (Magetsari et al. 1987, etc.). As documented by paleomagnetic data, this convergence also caused the 60° counterclockwise rotation of the SW arm of Sulawesi (Panjaitan and Mubroto, 1994) and 90° clockwise rotation of the North arm.



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