​​​​​​​MOSCOW

Seismological centers in Russia, the US and Europe reported an earthquake Thursday off the Kamchatka Peninsula, with magnitude estimates ranging from 7.2 to 7.8.

The Gov. of the Kamchatka region, Vladimir Solodov, said the quake had a 7.2 magnitude and a tsunami threat had been announced for the eastern coast.

"All emergency services have been placed on high alert. Procedures for response are well-established, and responsible personnel begin work within minutes. Currently, no reports of damage have been received. I ask everyone to remain calm. Updated data indicates a magnitude of 7.2," he said.

The Kamchatka Branch of the Russian Academy of Sciences' Geophysical Service confirmed that report, and said seismologists recorded a tremor measuring 7.2 on the Richter scale, located 93 kilometers (58 miles) from Petropavlovsk-Kamchatsky at a depth of 123 kilometers.

But the US National Oceanic and Atmospheric Administration (NOAA) reported the earthquake with a 7.8 magnitude, with an epicenter 128 kilometers east of Petropavlovsk-Kamchatsky at a depth of 10 kilometers. It also issued a tsunami warning.

And the European-Mediterranean Seismological Center reported the quake had a 7.7 magnitude, noting the epicenter was located 125 kilometers northeast of Petropavlovsk-Kamchatsky at a depth of 40 kilometers.

It is the latest significant seismic event to affect a region that also experienced earthquakes measuring 8.8 on July 30 and 7.4 on Sept. 13.

There have been no immediate reports of casualties or damage.