Japan earthquakes

M4.2 earthquake 26 km ENE of Iwaki, Japan

A magnitude 4.2 earthquake struck 26 km ENE of Iwaki, Japan on Sun, Jul 9, 2017, 3:36 AM JST (18:36 UTC), 41 km (25 mi) below the surface.

A larger quake followed: M5.8 52 km E 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
4.2 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2017-07-08 18:36:35 UTC
Depth
40.8 km (25.3 mi), shallow
Epicenter
37.179° N, 141.130° 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.

Location uncertainty
About 6.0 km horizontally, 7.6 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
109°
Stations used
47

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 13 in the 60 days after this one and 6 in the 30 days before it.

After

  1. 4.313 km S of Namie, Japan · 3373 days ago · 38 km deep · 25 km away
  2. 4.531 km ENE of Namie, Japan · 3373 days ago · 36 km deep · 45 km away
  3. 4.473 km ENE of Namie, Japan · 3369 days ago · 41 km deep · 84 km away · felt by 1
  4. 5.852 km E of Namie, Japan · 3364 days ago · 31 km deep · 48 km away · felt by 112
  5. 4.355 km ESE of Namie, Japan · 3364 days ago · 35 km deep · 47 km away · felt by 1
  6. 4.288 km E of Namie, Japan · 3361 days ago · 28 km deep · 82 km away
  7. 4.436 km ENE of Namie, Japan · 3359 days ago · 53 km deep · 49 km away · felt by 2
  8. 4.356 km ESE of Hitachi, Japan · 3354 days ago · 32 km deep · 84 km away · felt by 5
  9. 5.26 km W of Kitaibaraki, Japan · 3352 days ago · 8 km deep · 60 km away · felt by 214
  10. 4.18 km NNE of Funaishikawa, Japan · 3348 days ago · 66 km deep · 86 km away · felt by 8
  11. 4.655 km E of Namie, Japan · 3329 days ago · 42 km deep · 55 km away
  12. 4.811 km SE of Ishikawa, Japan · 3328 days ago · 6 km deep · 55 km away · felt by 16
  13. 4.53 km SSE of Kitaibaraki, Japan · 3326 days ago · 6 km deep · 57 km away · felt by 66

Before

  1. 4.556 km E of Namie, Japan · 3376 days ago · 39 km deep · 52 km away
  2. 4.834 km ESE of Marumori, Japan · 3377 days ago · 64 km deep · 67 km away · felt by 34
  3. 4.519 km W of Iwaki, Japan · 3378 days ago · 3 km deep · 43 km away
  4. 4.380 km E of Iwaki, Japan · 3386 days ago · 41 km deep · 63 km away
  5. 4.051 km ESE of Namie, Japan · 3393 days ago · 37 km deep · 33 km away
  6. 4.519 km ESE of Ishikawa, Japan · 3395 days ago · 10 km deep · 45 km away · felt by 14

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us20009w90. Read Mon, Oct 5, 2026, 7:41 AM UTC.