A tsunami warning has been issued for parts of California and Oregon, meaning residents are urged to move away from the coast or to high ground. The National Oceanic and Atmospheric Administration (NOAA)'s alert system issued the warning about 11:20 p.

A tsunami warning was issued for California's North Coast, after a massive earthquake off the coast of eastern Russia.

The U.S. Tsunami Warning System ( tsunami.gov) will be updating its guidance as experts learn more about the threat, including maps showing what areas face what risks. In the minutes and hours after a major earthquake, tsunami assessments change as researchers track data from buoy and other interments.