Tsunamis from the 29 March and 5 May 2015 Papua New Guinea earthquake doublet ( M w   7.5) and tsunamigenic potential of the New Britain trench | Zendy

Heidarzadeh Mohammad | Zendy; Gusman Aditya Riadi | Zendy; Harada Tomoya | Zendy; Satake Kenji | Zendy

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Tsunamis from the 29 March and 5 May 2015 Papua New Guinea earthquake doublet ( M w 7.5) and tsunamigenic potential of the New Britain trench

Author(s) -

Heidarzadeh Mohammad,

Gusman Aditya Riadi,

Harada Tomoya,

Satake Kenji

Publication year - 2015

Publication title -

geophysical research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.007

H-Index - 273

eISSN - 1944-8007

pISSN - 0094-8276

DOI - 10.1002/2015gl064770

Subject(s) - seismology , geology , trench , new guinea , seafloor spreading , tsunami earthquake , subduction , amplitude , seismic wave , slip (aerodynamics) , oceanography , tectonics , physics , ethnology , chemistry , organic chemistry , layer (electronics) , quantum mechanics , history , thermodynamics

We characterized tsunamis from the 29 March and 5 May 2015 Kokopo, Papua New Guinea, M w 7.5 earthquake doublet. Teleseismic body wave inversions using various rupture velocities ( V r ) showed similar source‐time functions and waveform agreements, but the spatial distributions of the slips were different. The rupture durations were ~45 and ~55 s for the March and May events, with their peaks at ~25 and at ~17 s, respectively. Tsunami simulations favored source models with V r = 1.75 and 1.50 km/s for the March and May earthquakes. The largest slip on the fault was similar (2.1 and 1.7 m), but the different depths and locations yielded maximum seafloor uplift of ~0.4 and ~0.2 m. Tsunami simulation from hypothetical great earthquakes ( M 8.4 and 8.5) on the New Britain trench showed that tsunami amplitudes may reach up to 10 m in Rabaul, but most tsunami energy was confined within the Solomon Sea.

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