Japan earthquake today — a powerful 7.4 magnitude earthquake struck the Pacific Ocean off northern Iwate Prefecture on April 20, 2026, at 4:53 PM local time. Japan's Meteorological Agency (JMA) has issued an active Japan earthquake tsunami warning for waves of up to three metres (10 feet), urging all coastal residents to evacuate immediately.
Japan Earthquake Today: What Happened
The Japan earthquake today hit at 4:53 PM local time with a preliminary magnitude of 7.4. The epicentre was located in the Pacific Ocean off the northern coast of Iwate Prefecture. The tremors were powerful enough to shake large buildings as far south as Tokyo, hundreds of kilometres away.
Around 40 minutes after the 7.4 magnitude earthquake, an 80-centimetre tsunami wave was recorded at Kuji port in Iwate. The Japan earthquake tsunami warning remains active, with authorities warning that multiple waves could continue to strike the coastline.
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"Evacuate immediately from coastal regions and riverside areas to a safer place such as high ground or an evacuation building. Tsunami waves are expected to hit repeatedly. Do not leave safe ground until the warning is lifted." — Japan Meteorological Agency (JMA)
Tsunami Warning: How Serious Is It?
The Japan earthquake tsunami warning covers multiple coastal communities along the Iwate coastline, with waves predicted up to three metres in height. National broadcaster NHK reported no immediate visible structural damage at several ports in Iwate, though Japan earthquake today damage assessments are still ongoing.
Residents are being warned not to rely on visual signs of the ocean retreating as their only alert. The Japan earthquake tsunami warning should be treated as a life-threatening emergency until officially lifted by the JMA.
Government Response
Japan's Prime Minister's office has activated a crisis management team in direct response to the Japan earthquake today. Emergency protocols are in place to coordinate rapid damage assessment across Iwate and neighbouring coastal prefectures. The Japan earthquake today Hokkaido region and surrounding areas are also being monitored for aftershock activity.
Defence forces and local disaster management teams are on high alert, with evacuation shelters operational across affected zones.
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Japan Earthquake Today: Historical Context
Japan is one of the world's most seismically active countries, sitting at the meeting point of several tectonic plates. The Japan earthquake today follows a December 2025 event in which a 7.5 magnitude quake off Aomori injured over 20 people and triggered a 70-centimetre tsunami. The government has long warned that a major quake along the Nankai Trough could kill up to 298,000 people and cause $2 trillion in damage.
Japan earthquake today Tokyo residents reported strong swaying in high-rise buildings, highlighting the capital's exposure to seismic risk. No confirmed Japan earthquake today death toll figures have been released at the time of publishing.
What to Watch Next
Key updates to follow regarding the Japan earthquake today include the official lifting of the tsunami warning, full coastal damage reports from Iwate, ongoing aftershock monitoring, and government statements on infrastructure impacts. Nexus News Alert will continue covering the Japan earthquake today live as the situation develops.
Stay tuned to Nexus News Alert for the latest updates on the Japan earthquake today 2026.
