©(Kazuhiro Nogi, AFP)
A powerful earthquake with a magnitude of 7.1 shook southern Japan on Thursday, but no major damage was reported, and only relatively minor tsunami waves lashed the coast.
The quake hit at 4:42 PM (7:42 GMT) off Kyushu at a depth of 25 kilometers (16 miles), the United States Geological Survey (USGS) 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.
The Japan Meteorological Agency (JMA) also said there was one quake with a magnitude of 7.1.
Broadcaster NHK showed footage of traffic lights shaking violently in Miyazaki on Kyushu's southeast coast.
The broadcaster also reported that three people were hurt in Miyazaki but gave no indication of the extent of their injuries.
Tsunamis of up to one meter were initially expected to arrive or had arrived in some coastal areas in Kyushu and Shikoku islands, the JMA said.
The agency also said a small tsunami was possible in Chiba, about 850 kilometers (530 miles) from the epicentre.
However, tsunamis of only 50 cm, 20 cm and 10 cm were confirmed to have hit some places, including the port of Miyazaki, more than an hour after the quake, it said.
The Pacific Tsunami Warning Center issued a warning that said hazardous tsunami waves were possible within 300 kilometers (185 miles) of the epicentre.
No abnormalities were reported at atomic power plants in the area, according to the nuclear regulation authority.
Unverified footage shared on social media showed only minor damage, including dishes and books that had fallen off shelves and a small wall that had collapsed in a car park.
The Japanese government set up a special task force in response to the quakes, according to a statement.
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% of the world's earthquakes.
At least 318 people were killed when an earthquake hit the Noto peninsula on the Sea of Japan side of the main island of Honshu on New Year's Day.
The January 1 quake and its aftershocks toppled buildings, caused fires and knocked out infrastructure.
Japan also routinely holds emergency drills to prepare for a major quake.
It is haunted by the memory of a colossal 9.0-magnitude underwater quake off northeastern Japan in March 2011, which triggered a tsunami that left around 18,500 people dead or missing.
It 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.
Tomohiro Osaki, with AFP
The quake hit at 4:42 PM (7:42 GMT) off Kyushu at a depth of 25 kilometers (16 miles), the United States Geological Survey (USGS) 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.
The Japan Meteorological Agency (JMA) also said there was one quake with a magnitude of 7.1.
Broadcaster NHK showed footage of traffic lights shaking violently in Miyazaki on Kyushu's southeast coast.
The broadcaster also reported that three people were hurt in Miyazaki but gave no indication of the extent of their injuries.
Tsunamis of up to one meter were initially expected to arrive or had arrived in some coastal areas in Kyushu and Shikoku islands, the JMA said.
The agency also said a small tsunami was possible in Chiba, about 850 kilometers (530 miles) from the epicentre.
However, tsunamis of only 50 cm, 20 cm and 10 cm were confirmed to have hit some places, including the port of Miyazaki, more than an hour after the quake, it said.
The Pacific Tsunami Warning Center issued a warning that said hazardous tsunami waves were possible within 300 kilometers (185 miles) of the epicentre.
No abnormalities were reported at atomic power plants in the area, according to the nuclear regulation authority.
Unverified footage shared on social media showed only minor damage, including dishes and books that had fallen off shelves and a small wall that had collapsed in a car park.
Task force
The Japanese government set up a special task force in response to the quakes, according to a statement.
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% of the world's earthquakes.
At least 318 people were killed when an earthquake hit the Noto peninsula on the Sea of Japan side of the main island of Honshu on New Year's Day.
The January 1 quake and its aftershocks toppled buildings, caused fires and knocked out infrastructure.
Japan also routinely holds emergency drills to prepare for a major quake.
It is haunted by the memory of a colossal 9.0-magnitude underwater quake off northeastern Japan in March 2011, which triggered a tsunami that left around 18,500 people dead or missing.
It 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.
Tomohiro Osaki, with AFP
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