  A tsunami hazard assessment was conducted for the communities of Sigatoka and
Cuvu, located on the island of Viti Levu, Fiji. The study presents an overview
of historical seismic and tsunami impact on the Pacific Island nation of Fiji
in order to identify source areas of relevance to the study. In addition, the
sensitivity of the Coral Coast of Viti Levu to tsunamis coming from different
parts of the New Hebrides and Tonga-Kermadec Subduction zones was investigated
and used to select worst case tsunami scenarios. Following the methodology
developed at the NOAA Center for Tsunami Research (Tang et al, 2006) more than
40 tsunami simulations were conducted on a low-resolution model. Four of the
sources simulated were selected as the most hazardous to the area of interest
and were subsequently modeled on a high-resolution (10 meter) grid of Sigatoka
and Cuvu. To these sources, an ensemble of 20 additional sources in the
Tonga-Kermadec Subduction Zone were selected for evaluation. These sources were
identified in an Intergovernmental Oceanographic Commission (IOC) report (IOC
Working Report No. 289, 2018) by a group of seismic experts on tsunami sources
in the region. Finally, one source from a 2022 study conducted by NCTR for the
US Department of State to assess tsunami hazard to the city of Suva, Fiji using
a probabilistic approach was selected for simulation on the high-resolution
model. The non-linear shallow water wave inundation Method Of Splitting Tsunami
(MOST) model (Titov and Gonz\'alez, 1997) is one of the tsunami modeling codes
in use by the National Tsunami Hazard Mitigation Program (NTHMP, 2011), (NTHMP,
2017) of the US to conduct tsunami inundation studies with the purpose of
developing evacuations maps. The MOST code was used in this study to determine
tsunami maximum amplitude, arrival and duration times, flow depths, tsunami
inundation, current speeds and attenuation.
