Japan earthquakes

M4.2 earthquake 63 km SW of Yonakuni, Japan

A magnitude 4.2 earthquake struck 63 km SW of Yonakuni, Japan on Thu, May 16, 1985, 6:08 AM GMT+8 (22:08 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.9 38 km ESE of Yilan, Taiwan. This one was a foreshock.

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Map

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

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The earthquake

Magnitude
4.2 (mb), light
Local time
UTC
1985-05-15 22:08:27 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
24.095° N, 122.526° 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
OPERATOR_ASSIGNED

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 17 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 3.732 km E of Yilan, Taiwan · 15096 days ago · 109 km deep · 92 km away
  2. 4.268 km SW of Yonakuni, Japan · 15096 days ago · 33 km deep · 14 km away
  3. 4.360 km ESE of Yilan, Taiwan · 15084 days ago · 30 km deep · 62 km away
  4. 5.938 km ESE of Yilan, Taiwan · 15083 days ago · 28 km deep · 71 km away
  5. 4.363 km ESE of Yilan, Taiwan · 15083 days ago · 10 km deep · 49 km away
  6. 4.158 km ESE of Yilan, Taiwan · 15083 days ago · 10 km deep · 53 km away
  7. 3.963 km WNW of Yonakuni, Japan · 15081 days ago · 10 km deep · 66 km away
  8. 3.933 km SE of Yilan, Taiwan · 15081 days ago · 10 km deep · 74 km away
  9. 4.661 km WNW of Yonakuni, Japan · 15081 days ago · 10 km deep · 59 km away
  10. 4.356 km WNW of Yonakuni, Japan · 15080 days ago · 10 km deep · 64 km away
  11. 4.372 km SW of Yonakuni, Japan · 15078 days ago · 32 km deep · 10 km away
  12. 4.263 km WNW of Yonakuni, Japan · 15076 days ago · 10 km deep · 59 km away
  13. 4.086 km S of Yonakuni, Japan · 15075 days ago · 33 km deep · 64 km away
  14. 3.742 km ESE of Yilan, Taiwan · 15064 days ago · 10 km deep · 68 km away
  15. 4.864 km WNW of Yonakuni, Japan · 15062 days ago · 10 km deep · 60 km away
  16. 4.828 km NNE of Hualien City, Taiwan · 15055 days ago · 35 km deep · 80 km away
  17. 4.078 km E of Hualien City, Taiwan · 15052 days ago · 33 km deep · 27 km away

Before

  1. 4.664 km SE of Yilan, Taiwan · 15114 days ago · 38 km deep · 43 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002evt. Read Tue, Sep 29, 2026, 3:55 AM UTC.