Japan Earthquake: 7.4 Magnitude Earthquake Strikes Tohoku Region; Tsunami Warning Issued
Japan Earthquake News: A powerful 7.4 magnitude earthquake struck off the coast of northern Japan on Monday, April 20, 2026, prompting immediate tsunami warnings and shaking buildings as far away as Tokyo.
The tremor occurred at 4:53 p.m. local time (0753 GMT) with its epicenter located in the Pacific waters approximately 100 km east-northeast of Miyako, Iwate Prefecture. According to the United States Geological Survey (USGS) and the Japan Meteorological Agency (JMA), the quake originated at a relatively shallow depth of about 10 kilometers.
AI-generated summary, reviewed by editors
Key Details of the Event:
Tsunami Alert: The JMA issued a warning for the Sanriku coast, noting that waves of up to 3 meters (10 feet) could reach the shore.
Regional Impact: High-intensity shaking was recorded in Aomori, Iwate, and Miyagi prefectures.
Tokyo Tremors: Residents in the capital, located hundreds of kilometers from the epicenter, reported significant swaying in high-rise buildings.
Infrastructure: Authorities are currently assessing potential damage, and several Shinkansen (bullet train) services in the Tohoku region were temporarily suspended for safety checks.
Recent Significant Earthquakes in Japan (April 2026)
Japan has experienced a spike in seismic activity over the last several days. Here are the most notable recent events leading up to today's major quake:
| Date | Location | Magnitude | Notes |
|---|---|---|---|
| April 18, 2026 | Nagano Prefecture (Central Japan) | 5.1 | Followed a 5.0 quake 90 minutes prior; caused transport delays. |
| April 18, 2026 | Omachi, Nagano | 5.0 | Registered "Upper 5" on the Japanese intensity scale. |
| April 12, 2026 | Off the Coast of Miyagi | 4.7 | Felt across the Tohoku region; no tsunami issued. |
| April 11, 2026 | Off the Coast of Kushiro | 5.3 | Struck northern Hokkaido; no major damage reported. |
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