Insights on the small tsunami from January 28, 2020, Caribbean Sea MW7.7 earthquake by numerical simulation and spectral analysis

A major left-lateral strike-slip Mw7.7 earthquake occurred in the vicinity of Caribbean Sea on January 28, 2020. As a result, small-scale tsunami was generated. The properties seismogenic source were described using observational data gathered for and tsunami, as well information regional tectonic setting. simulated with COMCOT model Okada’s dislocation from finite fault solutions MW7.7 earthquakes published by United States Geological Survey. simulation results compared to tide gauge records validate whether seafloor’s vertical displacement generated caused tsunami. We conducted spectral analysis better understand characteristics records. showed that co-seismic could have contributed but anomalously large high-frequency waves recorded George Town 11 min after unrelated earthquake-generated According spectrum analysis, predominant period noticeable only two minutes earthquake. This indicates close station possible 150 km away station. These facts suggest submarine landslide comprehensive not solely seafloor deformation event an earthquake-triggered primary cause. Therefore, combined impact sources led