very strong and shallow earthquake registered by Geoscience Australia as M7.3 hit Vanuatu at 19:33 UTC on April 28, 2016. The agency is reporting a depth of 28 km (17.4 miles). USGS is reporting M7.0 at a depth of 35 km (21.7 miles).
According to the USGS, the epicenter was located 5 km (3.1 mi) WSW of Norsup, 64 km (39.8 mi) SSE of Luganville and 209 km (129.9 mi) NNW of Port-Vila, Vanuatu.
There are 72 033 people living within 100 km (62 miles).
Based on all available data, hazardous tsunami waves are possible for some coasts, PTWC said.
Tsunami waves reaching 1 to 3 meters above the tide level are possible for some coasts of Vanuatu. Tsunami waves are forecast to be less than 0.3 meters above the tide level for the coasts of Fiji, New Caledonia, Papua New Guinea, Solomon Islands and Tuvalu.
Actual amplitudes at the coast may vary from forecast amplitude due to uncertanties in the forecast and local features. In particular, maximum tsunami amplitudes on atolls will likely be much smaller than the forecast indicates.
USGS issued a green alert for shaking-related fatalities and economic losses. There is a low likelihood of casualties and damage.
Overall, the population in this region resides in structures that are vulnerable to earthquake shaking, though some resistant structures exist.
Recent earthquakes in this area have caused secondary hazards such as tsunamis and landslides that might have contributed to losses.