India, July 30 -- Several U.S. states, including California, Washington, Oregon, and Alaska, are under a tsunami watch after a magnitude 8.7 earthquake struck off Russia's Kamchatka Peninsula. The U.S. Tsunami Warning System issued the alerts shortly after the quake.

Aleutian Islands: From Samalga Pass, Alaska (30 miles southwest of Nikolski) to Attu, Alaska, including the Pribilof Islands.

South Alaska and the Alaska Peninsula: Pacific coasts from Chignik Bay to Unimak Pass, Alaska (80 miles northeast of Unalaska).

Aleutian Islands: From Unimak Pass (80 miles northeast of Unalaska) to Samalga Pass (30 miles southwest of Nikolski).

California: The coast from the California-Mexico border to the California-Oregon border, including San F...