A powerful quake with a preliminary magnitude of 7.5 struck northeast and northern Japan on Monday, with a tsunami warning issued, the country’s weather agency said.
The 4:53 p.m. quake registered upper 5 on the Japanese seismic intensity scale of 7 and occurred at a depth of 10 kilometers, according to the Japan Meteorological Agency.
The agency forecast tsunami waves of up to 3 meters immediately reaching the Pacific coast of Hokkaido and Iwate prefectures.
The Japan Meteorological Agency has issued a tsunami warning for Iwate Prefecture and parts of Hokkaido and Aomori
The Japan Meteorological Agency has issued a tsunami warning for Iwate Prefecture and parts of Hokkaido and Aomori. Tsunami up to 3 meters high are expected.
It has issued a tsunami advisory to Hokkaido, Aomori, Miyagi and Fukushima prefectures. The water may reach up to 1 meter in those areas.
One 80 centimeter tsunami has struck Kuji Port in Iwate Prefecture, and the water is still rising. A 40 centimeter tsunami has also struck Miyako Port in Iwate Prefecture.
Details
Magnitude 7.5 – NEAR EAST COAST OF HONSHU, JAPAN
Magnitude Mw 7.5
Region NEAR EAST COAST OF HONSHU, JAPAN
Date time 2026-04-20 07:52:58.1 UTC
Location 39.9996 N ; 142.9406 E
Depth 10.0 km
Distances:
134 km ESE of Hachinohe, Japan / pop: 239046 / local time: 16:52:58.1 2026-04-20
94 km NE of Miyako, Japan / pop: 51721 / local time: 16:52:58.1 2026-04-20
Manual location disseminated on Mon Apr 20 08:07:22 2026 (UTC)
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