A massive earthquake registered by the USGS as M7.9 hit the Gulf of Alaska at 09:31 UTC on January 23, 2018 (00:31 local time). The agency is reporting a depth of 25 km (15.5 miles). EMSC is reporting M8.0 at a depth of 10 km (6.2 miles). Tsunami warnings, watches and advisories were issued following the quake. Over the next 3 hours, the USGS registered more than 20 aftershocks with magnitudes ranging from 2.5 to 5.3.
The epicenter was located 260.2 km (161.7 miles) SE of Chiniak (population 47) and 576.7 km (358.3 miles) S of Anchorage (population 291 826), Alaska, United States.
There are no people living within 100 km (62 miles). Some 14 000 people are estimated to have felt 14 000 light shaking.