Japan earthquakes

M5.5 earthquake 73 km SSE of Honchō, Japan

A magnitude 5.5 earthquake struck 73 km SSE of Honchō, Japan on Wed, May 22, 1968, 12:10 AM JST (15:10 UTC), 27 km (17 mi) below the surface.

A larger quake followed: M6.6 141 km ENE of Kuji, Japan. This one was a foreshock.

Shizunai-furukawachō 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
5.5 (mw), moderate
Local time
UTC
1968-05-21 15:10:15 UTC
Depth
26.8 km (16.7 mi), shallow
Epicenter
41.486° N, 143.152° 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.

How well it is located

Reviewed by a seismologist.

Magnitude uncertainty
±0.20
Depth from
From location

Nearest places

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

Nearby

Within 100 km, magnitude 2.5 and up: 7 in the 60 days after this one and 11 in the 30 days before it.

After

  1. 6.069 km S of Honchō, Japan · 21313 days ago · 50 km deep · 14 km away
  2. 6.6141 km ENE of Kuji, Japan · 21311 days ago · 27 km deep · 69 km away
  3. 5.6146 km ENE of Kuji, Japan · 21310 days ago · 28 km deep · 86 km away
  4. 5.574 km S of Honchō, Japan · 21304 days ago · 23 km deep · 27 km away
  5. 5.887 km SSW of Honchō, Japan · 21298 days ago · 47 km deep · 43 km away
  6. 6.3121 km SSE of Honchō, Japan · 21287 days ago · 41 km deep · 47 km away
  7. 5.811 km SSW of Honchō, Japan · 21278 days ago · 48 km deep · 67 km away

Before

  1. 5.6124 km SSE of Honchō, Japan · 21315 days ago · 28 km deep · 56 km away
  2. 6.1137 km SSE of Honchō, Japan · 21316 days ago · 37 km deep · 64 km away
  3. 5.768 km S of Honchō, Japan · 21318 days ago · 45 km deep · 14 km away
  4. 6.179 km SSW of Honchō, Japan · 21319 days ago · 33 km deep · 41 km away
  5. 6.1111 km S of Shizunai-furukawach?, Japan · 21319 days ago · 43 km deep · 47 km away
  6. 7.970 km S of Honchō, Japan · 21319 days ago · 31 km deep · 25 km away
  7. 6.173 km SSW of Honchō, Japan · 21319 days ago · 30 km deep · 36 km away
  8. 6.1114 km SSE of Honchō, Japan · 21320 days ago · 42 km deep · 41 km away
  9. 6.0165 km SE of Shizunai-furukawach?, Japan · 21320 days ago · 25 km deep · 51 km away
  10. 8.21968 Tokachi-Oki Earthquake · 21320 days ago · 27 km deep · 69 km away
  11. 5.7106 km ENE of Hachinohe, Japan · 21334 days ago · 20 km deep · 79 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event iscgem822472. Read Mon, Sep 28, 2026, 7:28 PM UTC.