M4.6 earthquake: Adjacent Sea of Chichijima Island
According to JMA, a magnitude 4.6 earthquake struck near Adjacent Sea of Chichijima Island on October 23, 2026. It was recorded at 11:17 AM GMT+9 at a depth of 20 km.
Magnitude and location may later be revised by JMA.
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Magnitude
M4.6
Mj · Light
Depth
20 km
Shallow
Time (UTC)
02:17:00 AM
October 23, 2026
Local time
11:17 AM
October 23, 2026 · GMT+9
Earthquakes recorded nearby afterwards
No other earthquakes have been recorded within 50 km of the epicenter since this one.
Earthquake history of the area
From 1990 until this earthquake, 153 earthquakes of magnitude 4.5 or greater were recorded within 100 km of the epicenter. The largest was an M6.2 earthquake on February 27, 2008.
- M6.2Bonin Islands, Japan region · 15 kmUSGS
- M6.0Bonin Islands, Japan region · 10 kmUSGS
- M5.8Bonin Islands, Japan region · 40 kmUSGS
- M5.8Bonin Islands, Japan region · 47 kmUSGS
- M5.8Bonin Islands, Japan region · 14 kmUSGS
- M5.7Bonin Islands, Japan region · 7.0 kmUSGS
- M5.6Bonin Islands, Japan region · 90 kmUSGS
- M5.5Bonin Islands, Japan region · 10 kmUSGS
Source: USGS earthquake catalogue (ComCat).
Frequently asked questions
Where was the October 23, 2026 earthquake near Adjacent Sea of Chichijima Island?
The earthquake occurred near Adjacent Sea of Chichijima Island at 26.600° N, 141.900° E, at a depth of 20 km.
How strong was the earthquake near Adjacent Sea of Chichijima Island?
JMA reported a magnitude of Mj 4.6 (light). How strongly it was felt, and any damage, also depend on depth, distance from the epicenter and local ground conditions.
Were there aftershocks after the earthquake near Adjacent Sea of Chichijima Island?
No other earthquakes have been recorded within 50 km of the epicenter since this one.