Japan earthquakes

M4.1 earthquake 43 km ENE of Iwaki, Japan

A magnitude 4.1 earthquake struck 43 km ENE of Iwaki, Japan on Sat, Feb 11, 2017, 6:38 AM JST (21:38 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.7 30 km ENE of Namie, 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
4.1 (Mwr, regional moment), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2017-02-10 21:38:59 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
37.148° N, 141.358° 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.

Fault motion and ground failure

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Faulting
Normal
Moment magnitude
4.1 Mwr
Nodal plane 1
Strike 35°, dip 42°, rake -60°
Nodal plane 2
Strike 177°, dip 54°, rake -114°

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 3.2 km horizontally, 1.9 km in depth
Magnitude uncertainty
±0.08
Depth from
Operator assigned
Station coverage gap
109°
Stations used
70

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 10 in the 30 days before it.

After

  1. 4.183 km ENE of Namie, Japan · 3514 days ago · 57 km deep · 81 km away
  2. 4.343 km ESE of Hitachi, Japan · 3507 days ago · 36 km deep · 84 km away · felt by 2
  3. 4.632 km SSE of Namie, Japan · 3507 days ago · 61 km deep · 17 km away · felt by 1
  4. 4.827 km ENE of Iwaki, Japan · 3507 days ago · 48 km deep · 17 km away · felt by 34
  5. 4.2near the east coast of Honshu, Japan · 3506 days ago · 19 km deep · 15 km away
  6. 5.730 km ENE of Namie, Japan · 3505 days ago · 47 km deep · 47 km away · felt by 100
  7. 4.8111 km E of Iwaki, Japan · 3505 days ago · 24 km deep · 72 km away
  8. 5.037 km ENE of Namie, Japan · 3504 days ago · 54 km deep · 47 km away · felt by 12
  9. 4.136 km E of Namie, Japan · 3501 days ago · 46 km deep · 34 km away
  10. 4.640 km SE of Namie, Japan · 3500 days ago · 14 km deep · 10 km away · felt by 2
  11. 5.345 km E of Namie, Japan · 3493 days ago · 44 km deep · 45 km away · felt by 49
  12. 4.345 km SE of Namie, Japan · 3493 days ago · 35 km deep · 7 km away
  13. 4.649 km E of Namie, Japan · 3483 days ago · 14 km deep · 32 km away · felt by 1
  14. 4.126 km ESE of Kitaibaraki, Japan · 3483 days ago · 47 km deep · 59 km away · felt by 2
  15. 4.419 km N of Daigo, Japan · 3478 days ago · 57 km deep · 93 km away
  16. 4.012 km W of Kitaibaraki, Japan · 3473 days ago · 35 km deep · 77 km away · felt by 5
  17. 4.850 km E of Namie, Japan · 3465 days ago · 43 km deep · 49 km away · felt by 8

Before

  1. 5.266 km ESE of Namie, Japan · 3522 days ago · 7 km deep · 34 km away · felt by 23
  2. 4.251 km ESE of Hitachi, Japan · 3524 days ago · 41 km deep · 78 km away · felt by 7
  3. 4.543 km ESE of Namie, Japan · 3525 days ago · 23 km deep · 16 km away
  4. 4.613 km WNW of Takahagi, Japan · 3526 days ago · 36 km deep · 82 km away · felt by 6
  5. 4.461 km E of Namie, Japan · 3526 days ago · 47 km deep · 55 km away
  6. 4.3107 km ESE of Takahagi, Japan · 3527 days ago · 39 km deep · 95 km away
  7. 4.830 km ESE of Namie, Japan · 3530 days ago · 25 km deep · 25 km away · felt by 1
  8. 4.57 km E of Funaishikawa, Japan · 3546 days ago · 59 km deep · 97 km away · felt by 35
  9. 4.251 km E of Namie, Japan · 3550 days ago · 10 km deep · 34 km away
  10. 4.546 km E of Namie, Japan · 3551 days ago · 10 km deep · 39 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us20008j2b. Read Sun, Oct 4, 2026, 4:49 AM UTC.