A Bayesian rupture model of the 2007 Mw 8.1 Solomon Islands earthquake in Southwest Pacific with coral reef displacement measurements. (1st May 2017)

• Record Type: Journal Article
• Authors: Chen, Ting; Luo, Haipeng; Furlong, Kevin P.
• Is Part Of: Journal of Asian earth sciences. Volume 138(2017)
• Page Start: 92
• Page End: 97
• Publication Date: 2017-05-01
• Subjects: Geodetic inversion -- Slip distribution -- Solomon Islands earthquake; Earth sciences -- Asia -- Periodicals; Sciences de la terre -- Asie -- Périodiques; Earth sciences; Asia; Periodicals; 555.05
• DOI: 10.1016/j.jseaes.2017.01.032
• Languages: English
• ISSNs: 1367-9120

Abstract

Graphical abstract: Highlights: A Bayesian inversion model of the 2007 Solomon Islands Earthquake is presented. Fault dip angle of 20° is concluded. Maximum dip slip is 11.6 m. Abstract: On 1st April 2007 a Mw 8.1 megathrust earthquake occurred in the western Solomon Islands of the Southwest Pacific and generated a regional tsunami with run-up heights of up to 12 m. A Bayesian inversion model is constructed to derive fault dip angle and cumulative co-seismic and early post-seismic slip using coral reef displacement measurements, in which both data misfit and moment magnitude are used as constraints. Results show three shallow, high-slip patches concentrated along the trench from west of Ranongga Island to Rendova Island on a fault plane dipping 20°, and a maximum dip slip of 11.6 m beneath Ranongga Island. Considerable subsidence on Simbo Island outboard of the trench on the subducting plate is not well explained with this model, but may be related to the effects of afterslip and/or Simbo Island's location near the triple junction among the Australia, Woodlark and Pacific plates.