Japan earthquakes

M4.0 earthquake 17 km W of Yonakuni, Japan

A magnitude 4.0 earthquake struck 17 km W of Yonakuni, Japan on Sat, Oct 26, 1985, 8:56 PM GMT+8 (12:56 UTC), 93 km (58 mi) below the surface.

A larger quake followed: M5.2 43 km E of Yilan, Taiwan. This one was a foreshock.

Yilan forecastMore in Japan

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
4.0 (mb), light
Local time
UTC
1985-10-26 12:56:47 UTC
Depth
92.7 km (57.6 mi), intermediate-depth
Epicenter
24.483° N, 122.834° E
Region
Japan
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Depth from
FROM_LOCATION

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 12 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 4.149 km ESE of Yilan, Taiwan · 14947 days ago · 10 km deep · 65 km away
  2. 5.243 km E of Yilan, Taiwan · 14943 days ago · 84 km deep · 75 km away
  3. 4.711 km S of Yonakuni, Japan · 14942 days ago · 52 km deep · 22 km away
  4. 4.825 km E of Yilan, Taiwan · 14938 days ago · 90 km deep · 88 km away
  5. 4.766 km SE of Yilan, Taiwan · 14937 days ago · 27 km deep · 62 km away
  6. 4.879 km E of Hualien City, Taiwan · 14926 days ago · 18 km deep · 71 km away
  7. 4.397 km S of Yonakuni, Japan · 14925 days ago · 10 km deep · 99 km away
  8. 4.572 km SW of Yonakuni, Japan · 14921 days ago · 43 km deep · 61 km away
  9. 4.659 km NNW of Yonakuni, Japan · 14917 days ago · 10 km deep · 51 km away
  10. 4.635 km SE of Jiufen, Taiwan · 14911 days ago · 10 km deep · 87 km away
  11. 3.626 km E of Yonakuni, Japan · 14911 days ago · 33 km deep · 43 km away
  12. 4.980 km ESE of Hualien City, Taiwan · 14890 days ago · 45 km deep · 86 km away

Before

  1. 4.438 km SSE of Yilan, Taiwan · 14950 days ago · 11 km deep · 97 km away
  2. 4.251 km NE of Hualien City, Taiwan · 14951 days ago · 20 km deep · 89 km away
  3. 4.224 km E of Yilan, Taiwan · 14972 days ago · 10 km deep · 89 km away
  4. 3.742 km W of Ishigaki, Japan · 14974 days ago · 33 km deep · 93 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002m57. Read Thu, Oct 1, 2026, 2:00 AM UTC.