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Russia 8.2 earthquake is big but no deaths

Russia 8.2 earthquake: The USGS says it was even bigger, an 8.3 earthquake, and felt as far away as Moscow. But the Russia earthquake caused no fatalities.

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Far eastern Russia experienced a magnitude 8.3 earthquake, according to the USGS. Russian officials reported an 8.2 quake.

USGS

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A magnitude 8.2 earthquake struck off Russia's eastern coast on Friday, briefly prompting a tsunami scare but causing no casualties or substantial damage, Russian emergency authorities said.

The USGS says the quake was actually magnitude 8.3.

The epicentre of the quake was located at a depth of 385 miles (620 km) in the Sea of Okhotsk, 244 miles (390 km) west of the nearest city, Petropavlovsk-Kamchatsky, the U.S. Geological Survey said.

How big is a magnitude 8.2 quake, compared to say, a magnitude 5.8 quake?

The magnitude scale is really comparing amplitudes of waves on a seismogram, not the strength (energy) of the quakes. So, a magnitude 8.2 is 251 times bigger than a 5.8 quake as measured on seismograms, but the 8.2 quake is about 3,981 times stronger than the 5.8, according to the US Geological Survey.

The USGS says:

This quake was felt in Petropavlovsk-Kamchatsky, the main city on the Kamchatka peninsula and home to a nuclear submarine base, and on Sakhalin island, where Russia's largest liquefied natural gas project is located.

Regional emergency authorities issued a tsunami warning for Sakhalin and the Kurile islands, advising residents of dangerous areas to seek high ground, but lifted the warning several minutes later.

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Residents of northern Japan felt the quake but there was no tsunami warning from Japan's meteorological agency. (Editing by Elizabeth Piper)

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