Japan's earthquake frequency reflects complex tectonic landscape
Japan averages 1,500 earthquakes yearly due to active tectonic plate interactions.
Event / Disaster
Japan Seismic Activity April 2026
Series of earthquakes strike Japan including a 6.1 magnitude quake in southern Hokkaido and a more powerful 7.7 magnitude earthquake off Iwate prefecture one week prior that caused injuries and tsunami waves. Japan Meteorological Agency warns of elevated risk for major earthquakes exceeding 8.0 magnitude.
4 reported locations
Daily activity
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2026-08-18 to 2026-11-15 · UTC publication dates
Coverage begins 27 Apr, 07:06 UTC
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What happened
5.0 magnitude earthquake occurs offshore south of Hokkaido
A 5.0 magnitude earthquake occurred offshore in the sea several hundred kilometers south of Hokkaido, a few hours before the 6.1 magnitude main earthquake on April 28, 2026.
Japan Meteorological Agency warns of elevated major earthquake risk
Following the 7.7 magnitude earthquake off Iwate, the Japan Meteorological Agency (JMA) issued a warning that the probability of a major earthquake of 8.0 magnitude or greater occurring is elevated above normal levels.
7.7 magnitude earthquake struck off Iwate prefecture one week prior
A powerful 7.7 magnitude earthquake struck offshore near Iwate prefecture in northern Japan one week before the April 28 events. The earthquake caused six injuries and was felt in Tokyo, several hundred kilometers from the epicenter. Tsunami waves reaching 80 centimeters struck a port in Iwate, with smaller waves observed along other northern coasts of Japan.
6.1 magnitude earthquake strikes southern Hokkaido, Japan
A 6.1 magnitude earthquake struck southern Hokkaido on Monday, April 28, 2026, at approximately 05:30 local time (21:30 UTC on April 27). The earthquake occurred at a depth of approximately 80 kilometers. No tsunami alert was issued. The affected region south of Hokkaido is sparsely populated, located approximately 200 kilometers east of Sapporo.
Japan experiences approximately 1,500 earthquakes annually
Japan, located at the junction of four major tectonic plates along the western edge of the Pacific Ring of Fire, experiences the highest seismic risk of any major country. The archipelago of approximately 125 million inhabitants experiences an average of 1,500 earthquakes per year, representing approximately 18 percent of all earthquakes recorded globally.
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2 alternative perspectives
Japan issues elevated major earthquake risk warning after April sequence
Japan's Meteorological Agency warns of elevated major earthquake risk following April's seismic sequence.
Japan experiences sequence of significant earthquakes across regions
Japan recorded three earthquakes ranging from 5.0 to 7.7 magnitude within one week across Hokkaido and Iwate.