Japan earthquakes

M3.9 earthquake 47 km ESE of Hitachi, Japan

A magnitude 3.9 earthquake struck 47 km ESE of Hitachi, Japan on Sat, Aug 21, 1982, 4:36 AM JST (19:36 UTC), 52 km (32 mi) below the surface.

A larger quake followed: M5.6 79 km ESE of Hitachi, Japan. 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
3.9 (mb), minor
Local time
UTC
1982-08-20 19:36:54 UTC
Depth
51.7 km (32.1 mi), shallow
Epicenter
36.463° N, 141.152° 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.

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 9 in the 60 days after this one and 43 in the 30 days before it.

After

  1. 5.679 km ESE of Hitachi, Japan · 16101 days ago · 36 km deep · 32 km away
  2. 4.816 km E of Iwaki, Japan · 16096 days ago · 63 km deep · 69 km away
  3. 4.250 km ESE of Hitachi, Japan · 16093 days ago · 50 km deep · 8 km away
  4. 4.233 km ESE of ?arai, Japan · 16092 days ago · 42 km deep · 37 km away
  5. 4.251 km ESE of Hitachi, Japan · 16089 days ago · 53 km deep · 8 km away
  6. 4.44 km SE of Karasuyama, Japan · 16079 days ago · 123 km deep · 89 km away
  7. 4.871 km ENE of Kashima-shi, Japan · 16075 days ago · 48 km deep · 36 km away
  8. 4.586 km ENE of Hasaki, Japan · 16072 days ago · 33 km deep · 75 km away
  9. 4.2109 km ENE of Hasaki, Japan · 16063 days ago · 33 km deep · 66 km away

Before

  1. 5.436 km ESE of Hitachi, Japan · 16109 days ago · 50 km deep · 11 km away
  2. 5.430 km ESE of Hitachi, Japan · 16111 days ago · 59 km deep · 19 km away
  3. 4.473 km NE of Hasaki, Japan · 16122 days ago · 33 km deep · 44 km away
  4. 4.863 km ENE of Kashima-shi, Japan · 16122 days ago · 33 km deep · 35 km away
  5. 4.255 km ESE of Hitachi, Japan · 16123 days ago · 33 km deep · 10 km away
  6. 4.367 km NE of Hasaki, Japan · 16123 days ago · 33 km deep · 45 km away
  7. 4.181 km ESE of Takahagi, Japan · 16124 days ago · 33 km deep · 37 km away
  8. 5.0near the east coast of Honshu, Japan · 16127 days ago · 55 km deep · 71 km away
  9. 4.5109 km ESE of Kitaibaraki, Japan · 16128 days ago · 33 km deep · 68 km away
  10. 4.056 km ENE of Kashima-shi, Japan · 16130 days ago · 33 km deep · 35 km away
  11. 4.0115 km ENE of Hasaki, Japan · 16130 days ago · 33 km deep · 70 km away
  12. 4.9103 km ESE of Kitaibaraki, Japan · 16131 days ago · 33 km deep · 61 km away
  13. 5.0120 km ENE of Hasaki, Japan · 16131 days ago · 36 km deep · 84 km away
  14. 5.594 km ESE of Takahagi, Japan · 16131 days ago · 45 km deep · 47 km away
  15. 4.991 km ENE of Hasaki, Japan · 16131 days ago · 49 km deep · 60 km away
  16. 4.471 km ESE of Takahagi, Japan · 16131 days ago · 33 km deep · 28 km away
  17. 4.758 km ESE of Takahagi, Japan · 16131 days ago · 33 km deep · 16 km away
  18. 4.597 km ENE of Hasaki, Japan · 16131 days ago · 33 km deep · 76 km away
  19. 4.887 km ENE of Hasaki, Japan · 16132 days ago · 49 km deep · 70 km away
  20. 4.957 km ESE of Namie, Japan · 16132 days ago · 39 km deep · 90 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0001p5s. Read Tue, Sep 22, 2026, 10:25 PM UTC.