Earthquakes in Japan — April 2026

66 earthquakes were recorded in Japan during April 2026, an average of 2.2 per day.

65 reached magnitude 4 or above and 20 reached magnitude 5 or above. The average focal depth was 59 km.

The month's largest event in Japan was a magnitude 7.4 earthquake near Miyako, Japan on 20 April 2026 at 07:52 UTC. A magnitude 7.4 earthquake radiates roughly 1.9 million tons of TNT equivalent in seismic energy.

That is close to the Japan monthly average of 57 events over the period we cover, and down from the 83 recorded the previous month.

85% of events here are shallow (under 70 km), 9% intermediate (70–300 km) and 6% deep-focus (over 300 km). That proportion of deep-focus events is the signature of a subduction zone: only a cold slab descending into the mantle stays brittle enough to rupture at those depths.

By band, the catalogue holds 1 in the magnitude 3 range, 45 in the magnitude 4 range, 17 in the magnitude 5 range, 1 in the magnitude 6 range, 2 in the magnitude 7 range.

Activity peaked on 20 April, when 9 events were recorded.

2 event(s) this month carry a USGS link to NOAA tsunami information; the flag does not indicate whether a tsunami occurred.

The month's largest events were M7.4 near Miyako, Japan on 20 April at 10 km; M7.4 near Miyako, Japan on 20 April at 35 km; M6.1 near Sarabetsu, Japan on 26 April at 81 km.

That is 16% above the 57 events Japan averages per month across the 21 months on record.