Tsunami threats in the Bay Area are over after waves from the massive 8.8 Russia earthquake reached the San Francisco coast early Wednesday morning, but California coastal communities continue to monitor rising wave activity.

The year’s strongest earthquake struck off Russia’s Kamchatka Peninsula, triggering tsunami warnings and advisories in Hawaii, California, Oregon and Washington.

The 8.8 magnitude temblor struck off the coast of the Kamchatka Peninsula, an isolated strip along the Pacific Ocean, overnight. Residents of the peninsula fled inland as 16-foot waves caused flooding.