Japan earthquakes

M4.4 earthquake 109 km ESE of Iwaki, Japan

A magnitude 4.4 earthquake struck 109 km ESE of Iwaki, Japan on Wed, Apr 8, 1987, 3:58 PM JST (06:58 UTC), 53 km (33 mi) below the surface.

A larger quake followed: M6.1 52 km E of Iwaki, Japan. This one was a foreshock.

Iwaki 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
4.4 (mb), light
Local time
UTC
1987-04-08 06:58:41 UTC
Depth
52.6 km (32.7 mi), shallow
Epicenter
36.675° N, 142.025° 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: 17 in the 60 days after this one and 3 in the 30 days before it.

After

  1. 6.152 km E of Iwaki, Japan · 14404 days ago · 55 km deep · 66 km away
  2. 4.9off the east coast of Honshu, Japan · 14403 days ago · 32 km deep · 97 km away
  3. 4.466 km E of Iwaki, Japan · 14399 days ago · 56 km deep · 54 km away
  4. 6.762 km E of Iwaki, Japan · 14398 days ago · 30 km deep · 67 km away
  5. 4.361 km SE of Namie, Japan · 14398 days ago · 55 km deep · 68 km away
  6. 4.479 km ESE of Namie, Japan · 14398 days ago · 33 km deep · 55 km away
  7. 4.631 km SE of Namie, Japan · 14397 days ago · 57 km deep · 96 km away
  8. 4.256 km SE of Namie, Japan · 14395 days ago · 60 km deep · 73 km away
  9. 4.941 km ENE of Iwaki, Japan · 14390 days ago · 61 km deep · 85 km away
  10. 4.565 km ESE of Namie, Japan · 14390 days ago · 50 km deep · 65 km away
  11. 5.184 km E of Iwaki, Japan · 14389 days ago · 48 km deep · 51 km away
  12. 4.649 km ESE of Namie, Japan · 14388 days ago · 55 km deep · 80 km away
  13. 4.740 km SE of Namie, Japan · 14386 days ago · 90 km deep · 88 km away
  14. 4.288 km ESE of Namie, Japan · 14386 days ago · 33 km deep · 55 km away
  15. 5.2102 km ENE of Hasaki, Japan · 14381 days ago · 45 km deep · 56 km away
  16. 5.180 km E of Namie, Japan · 14380 days ago · 40 km deep · 99 km away
  17. 4.639 km ESE of Iwaki, Japan · 14361 days ago · 62 km deep · 71 km away

Before

  1. 6.771 km E of Namie, Japan · 14414 days ago · 29 km deep · 79 km away
  2. 5.184 km E of Iwaki, Japan · 14442 days ago · 46 km deep · 35 km away
  3. 5.670 km ESE of Iwaki, Japan · 14442 days ago · 47 km deep · 43 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0003402. Read Tue, Sep 22, 2026, 8:43 PM UTC.