The latest quake followed the massive July 30 earthquake that measured 8.8 in magnitude and occurred off the Kamchatka Peninsula, triggering tsunami warnings across the Pacific Ocean

In July 30, a magnitude-8.8 earthquake shook Russia's Far East. The earthquake at 8:25 am Japan time had a preliminary magnitude of 8.0, Japan and US seismologists said. The US Geological Survey later updated its measurement to 8.