Tsunami Simulation for the 22 January 2017 Earthquake occurred on​ Bougainville Island, Papua New Guinea

W-phase Moment Tensor Solution (USGS)

Event time: 2017-01-22 04:30:23 UTC.

Seismic Moment: 9.75e+20 Nm.

Magnitude: 7.9 Mw.

Focal depth: 136 km.

Epicenter: 6.214°S and 155.122°E.

Fault Model

Strike/dip/rake: 298°/37°/76° (Nodal Plane 1)

Fault dimension: 96 km × 48 km.

Slip amount: 5.2 m.

Tsunami Simulation Result

Based on tsunami simulation, the maximum tsunami amplitude along the coast of Bougainville Island is up to 1.2 m. The maximum tsunami amplitude around Buka Town is 0.8 m. The tsunami is confined by the Solomon Basin and only very small tsunami energy escape the Basin. While tsunami amplitudes along the coast of other islands around the Solomon Basin are less than 20 cm.

 

trimzmax3-ps

Simulated maximum tsunami amplitude from the 2017 Bougainville earthquake (Mw 7.9). Red rectangle indicates the earthquake fault model and red star indicates the epicenter.

 

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