Sand Point, Alaska harbor area on June 7, 2016.
Oct. 19, 2020, 6:12 PM EDT / Updated Oct. 19, 2020, 7:40 PM EDTBy Doha Madani
A tsunami warning was issued for southern Alaska on Monday after a major earthquake and large aftershock hit near the Alaskan Peninsula.
The warning was later downgraded to an advisory by the National Weather Service.
An initial earthquake with a 7.5 magnitude occurred around Sand Point, Alaska, a city on one of the Shumagin Islands, just before 1 p.m. local time (5 p.m. E.T.), according to the Official U.S. Geological Survey. An aftershock hit the area about 20 minutes later at a magnitude of 5.8, the USGS said.