Maps: 7.8-Magnitude Earthquake Off Russia Prompts Brief Tsunami Advisory in Alaska | Aftershock R…

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Maps: 7.8-Magnitude Earthquake Off Russia Prompts Brief Tsunami Advisory in Alaska

By William B. Davis, Madison Dong, Judson Jones, John Keefe, Joey K. Lee, Bea Malsky and Erin McCann

A major, 7.8-magnitude earthquake struck in the North Pacific Ocean on Friday, according to the United States Geological Survey. The earthquake prompted a brief tsunami advisory, the second-highest alert level, for some coastal portions of western Alaska, which was lifted about two hours later.

The temblor happened at 6:58 a.m. Kamchatka time about 80 miles east of Petropavlovsk-Kamchatsky, Russia, data from the agency shows.

Tsunamis are a series of long waves caused by a large and sudden displacement of water in the ocean, usually from a large earthquake on or below the ocean floor. Tsunamis radiate in all directions from the epicenter and can cause dangerous coastal flooding and powerful currents that can last for hours or days.

Aftershock Rocks Kamchatka after July’s Massive Earthquake

A powerful magnitude 7.8 aftershock off Russia’s Kamchatka Peninsula that arose from July’s magnitude 8.8 earthquake is raising concerns about possible tsunami impacts, although risk appears to be waning

A seismic map shows the epicenter and intensity of a major earthquake that struck off the eastern coast of Russia’s Kamchatka Peninsula on September 18, 2025, EDT.

Less than two months after a magnitude 8.8 earthquake rocked Russia’s Kamchatka Peninsula, another strong earthquake occurred early on September 19 local time.

Although tsunami waves have been observed closer to the earthquake’s epicenter off Kamchatka’s eastern coast, shortly before 5 P.M. EDT, officials at the Pacific Tsunami Warning Center announced an “all clear” for Hawaii, ruling out the possibility of giant waves crossing the Pacific Ocean.

Multiple Earthquakes Slam Russian Coastline

Minor earthquakes have continued rattling the Kamchatka region of Russia in the aftermath of a massive 7.8 magnitude temblor that struck the area on Thursday, with aftershocks from 4.5 to 5.5 magnitude throughout Friday.

Three moderate earthquakes struck off the coast of Russia's Kamchatka Peninsula early Monday, shaking one of the world's most geologically volatile regions. Kamchatka borders the Pacific Ring of Fire, and the region has endured a number of recent quakes just two months after getting slammed by one packing an 8.8 magnitude.

The activity culminated in Thursday's quake, which briefly triggered warnings of a tsunami, although no such event occurred. However, the National Oceanic and Atmospheric Administration (NOAA) said that Hawaii had no expected threat of a tsunami despite a Pacific-wide warning.

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