An earthquake with a preliminary magnitude of 6.9 struck the Kyushu region of southern Japan on Monday, the Japan Meteorological Agency said.
Tsunami advisories for waves of a maximum height of 1 metre were issued for the southern prefectures of Miyazaki and Kochi.
A 20-centimetre tsunami was later recorded reaching Miyazaki city, public broadcaster NHK reported. The city – the prefectural capital – has a population of roughly 400,000 people.
There were no abnormalities reported at the Ikata Nuclear Power Plant in western Japan or the Sendai Nuclear Power Plant in Kagoshima prefecture, NHK said, referring to the two plants nearest to where the quake occurred.
The JMA is investigating whether the quake was related to the Nankai Trough, NHK said.
Japan in August issued its first-ever advisory of higher-than-usual risks of a megaquake after a strong quake occurred at the edge of a tremulous seabed zone along the Pacific coast known as the Nankai Trough.
(Reporting by Rhea Rose Abraham in Bengaluru; Editing by Alison Williams and Hugh Lawson)
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