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7.1 magnitude earthquake hits off Japan: USGS
By AFP - Aug 08,2024 - Last updated at Aug 08,2024
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A 6.9-magnitude earthquake followed by a 7.1 tremor struck off Japan’s southern island of Kyushu (AFP photo)
TOKYO — A powerful 7.1-magnitude earthquake struck off southern Japan on Thursday, the United States Geological Survey said, with the local meteorological agency warning of tsunamis striking coastal areas.
The quake hit at 4:42 pm (0742 GMT) off Kyushu at a depth of 25 kilometres, the US agency said.
The USGS had initially reported two strong quakes, with magnitudes of 6.9 and 7.1, but later said there had only been one tremor.
"This error has been fixed. There was one event," the USGS said.
The Japan Meteorological Agency (JMA) also reported a single quake with a magnitude of 7.1.
"Tsunamis will strike repeatedly. Please do not enter the sea or approach the coast until the warning is lifted," the JMA said on X.
There were no immediate reports of any damage.
The Japanese government set up a special task force in response to the quakes, according to a statement.
Tsunamis of up to one metre were initially expected to arrive or had arrived in some coastal areas in Kyushu and Shikoku islands, broadcaster NHK reported.
Sitting on top of four major tectonic plates along the western edge of the Pacific "Ring of Fire", Japan is one of the world's most tectonically active countries.
The archipelago, home to around 125 million people, experiences around 1,500 jolts every year and accounts for around 18 percent of the world's earthquakes.
The vast majority are mild, although the damage they cause varies according to their location and the depth below the Earth's surface at which they strike.
Still, even large quakes usually cause little damage thanks to special construction techniques and strict building regulations in the world's number four economy.
On New Year's Day, at least 318 people died after an earthquake hit the Noto peninsula on the Sea of Japan side of the main island of Honshu.
The January 1 quake and its aftershocks toppled buildings, caused fires and knocked out infrastructure at a time when families were celebrating the new year.
Japan has strict construction regulations intended to ensure buildings can withstand strong earthquakes, and routinely holds emergency drills to prepare for a major jolt.
But the country is haunted by the memory of a colossal 9.0-magnitude undersea quake off northeastern Japan in March 2011 which triggered a tsunami that left around 18,500 people dead or missing.
The 2011 tsunami also sent three reactors into meltdown at the Fukushima nuclear plant, causing Japan's worst post-war disaster and the most serious nuclear accident since Chernobyl.
In March 2022, a 7.4-magnitude quake off the coast of Fukushima shook large areas of eastern Japan, killing three people.
The capital Tokyo was devastated by a huge earthquake a century ago in 1923.
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