Tsunami threat, warnings issued as Russian coast struck by series of earthquakes

A 7.4 magnitude quake struck near Petropavlovsk-Kamchatsky, Russia, USGS said.

Residents of Russia's Kamchatka Peninsula were warned of potential tsunami waves as a series of earthquakes, including a 7.4 magnitude one, struck off the Russian coast, according to the U.S. Geological Survey.

A Tsunami threat was issued off the Kamchatka coast, according to the U.S. Tsunami Warning System.

"Tsunami waves reaching 0.3 to 1 meters above the tide level are possible for some coast of Russia," the forecast said.

The Russian Ministry of Emergency Situations warned residents near the earthquake area that under "no circumstances" try to go to the shore to watch the tsunami. The ministry added, however, that "the height of the waves that may reach the coast is not high."

"A tsunami wave with a height of no more than 60 cm is possible to approach the Aleutian Municipal District, no more than 40 cm to the Ust-Kamchatka Municipal District, and no more than 15 cm to the Petropavlovsk-Kamchatka District," Ministry of Emergency Situations said in a statement.

The alert followed several notable quakes that hit within about an hour off the coast of Petropavlovsk-Kamchatsky, Russia, according to USGS.

The first was a 7.0 magnitude quake in the sea about 142 km east of the city, USGS said, citing preliminary data. Within moments, a 6.7 magnitude quake struck some 130 km east of the city, followed by a series of quakes with magnitudes initially measured at 7.4, 6.7 and 6.6, according to USGS. Several lesser earthquakes followed in the same area.

Smaller tsunami waves were possible in Hawaii, Japan and the Midway Atoll, the U.S. Tsunami Warning System said.

State and city officials in Hawaii issued tsunami watches, which were later canceled, according to the NWS Pacific Tsunami Warning Center.

"Tsunami Watch Issued - Prepare to Act! A Tsunami Watch means a tsunami is possible, but the situation is still being evaluated," the Honolulu Department of Emergency Management said on social media prior to the alert being canceled.

ABC News' Jessica Gorman contributed to this report.