Japan earthquakes

M5.7 earthquake 145 km ENE of Miyako, Japan

A magnitude 5.7 earthquake struck 145 km ENE of Miyako, Japan on Wed, Jul 24, 1968, 3:09 AM JST (18:09 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M6.1 140 km ENE of Noda, Japan. This one was a foreshock.

Miyako 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
5.7 (mw), moderate
Local time
UTC
1968-07-23 18:09:19 UTC
Depth
21.0 km (13.0 mi), shallow
Epicenter
39.928° N, 143.596° 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 8 in the 30 days before it.

After

  1. 6.1140 km ENE of Noda, Japan · 21245 days ago · 26 km deep · 52 km away
  2. 5.6184 km E of Noda, Japan · 21237 days ago · 16 km deep · 57 km away
  3. 6.0130 km E of Noda, Japan · 21212 days ago · 25 km deep · 29 km away
  4. 5.7132 km ENE of Miyako, Japan · 21212 days ago · 22 km deep · 22 km away
  5. 5.587 km E of Noda, Japan · 21207 days ago · 32 km deep · 66 km away
  6. 5.6156 km E of Miyako, Japan · 21194 days ago · 21 km deep · 25 km away
  7. 5.5169 km SSE of Honchō, Japan · 21186 days ago · 26 km deep · 88 km away

Before

  1. 5.6164 km E of Noda, Japan · 21250 days ago · 24 km deep · 45 km away
  2. 6.0113 km E of Miyako, Japan · 21256 days ago · 20 km deep · 45 km away
  3. 6.0109 km E of Yamada, Japan · 21257 days ago · 22 km deep · 53 km away
  4. 5.9134 km E of Noda, Japan · 21258 days ago · 19 km deep · 42 km away
  5. 5.5178 km ENE of Noda, Japan · 21259 days ago · 15 km deep · 77 km away
  6. 5.587 km E of Yamada, Japan · 21259 days ago · 27 km deep · 74 km away
  7. 5.5150 km E of Miyako, Japan · 21266 days ago · 10 km deep · 21 km away
  8. 5.8139 km E of Miyako, Japan · 21273 days ago · 24 km deep · 36 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event iscgem819286. Read Tue, Sep 22, 2026, 12:17 PM UTC.