A tsunami advisory was downgraded to a watch for Southern California coastlines after little activity was seen overnight, but weather experts warned that fluctuations in the tide could continue throughout Wednesday, July 30, following an 8.8-magnitude earthquake near Russia.

Waves were reported along a wide swath of the Northern California coast, including in San Francisco. The rest of the state was under a lesser tsunami advisory.

A massive magnitude 8.8 earthquake struck off Russia's Pacific coast on Tuesday, sparking tsunami warnings -- and evacuations of coastal areas -- in Hawaii and alerts all down the U.S. West Coast. After the initial tsunami waves had washed ashore in Hawaii and along the West Coast,