The Solomon Island has
experienced earthquakes that were highly tsunamic genic in nature. Recent large
earthquakes occurred near the plate convergence zone between the Australian and
the Pacific Plates. Still, seismic gaps exist in areas along the subduction
zone. Therefore, this study looks into scenario earthquakes along with these
seismic gaps in the western and eastern parts of the Solomon Islands. TUNAMI
numerical simulation code was adopted to investigate tsunami hazards in the
study area. We assumed the two scenario rectangular fault models with different
amounts of slips (i.e., 2 m, 5 m, and 10 m) and calculated seafloor deformation
and tsunami propagation. We used GEBCO Data for bathymetry, SRTM data for
topography in inundation modeling. We assumed output points to get tsunami
waveforms for different islands and to get maximum wave heights and their
arrival time on the target locations. Here, we discuss the results for the
assumed fault model with 10m slip for two scenario earthquakes. For the western
Solomon study areas, the maximum wave height is 4.8 m on Rennell Island and is
3.6 m at the coastline of Guadalcanal Island. For the eastern Solomon study
areas, the maximum wave heights of 4.9 m and 1.98 m are observed at Nama and
Avita on Santa Cruz Islands, with arrival times of 20 and 10 minutes,
respectively. The tsunami inundation modeling shows run-up distance of more
than 100 m for Managakiki coastlines and 84m for the coastline of Nama
settlement in Santa Cruz Islands. The study demonstrated an overview of
possible seismic events that will help tsunami disaster management and planning
for the Solomon Islands. Accurate data and finer bathymetric data are crucial
in improving simulations within other seismic-prone areas within the Solomon
Islands.
Keywords: Tsunami propagation, Tsunami simulation, Tsunami Inundation, Tsunami Height, GEBCO