Japan earthquakes

M5.8 earthquake 34 km ENE of ?arai, Japan

A magnitude 5.8 earthquake struck 34 km ENE of ?arai, Japan on Fri, Jul 20, 1973, 5:12 PM JST (08:12 UTC), 46 km (29 mi) below the surface.

Ōarai 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
5.8 (mb), moderate
Local time
UTC
1973-07-20 08:12:53 UTC
Depth
46.0 km (28.6 mi), shallow
Epicenter
36.406° N, 140.951° E
Region
Japan
Strongest shaking
IV, light shaking
Tsunami flag
No
Status
Reviewed by a seismologist

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated
IV, light shaking
Peak ground acceleration
3.9% of gravity
Peak ground velocity
1.3 cm/s
Map
Automatic
USGS ShakeMap: estimated shaking intensity around the epicenter
Estimated shaking intensity. Map: USGS ShakeMap.

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Depth from
CONSTRAINED_BY_DEPTH_PHASES
Stations used
82

Nearest places

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

Nearby

Within 100 km, magnitude 2.5 and up: 9 in the 60 days after this one and 3 in the 30 days before it.

After

  1. 3.85 km ENE of Funaishikawa, Japan · 19421 days ago · 62 km deep · 31 km away
  2. 3.943 km ESE of Takahagi, Japan · 19418 days ago · 40 km deep · 21 km away
  3. 3.935 km E of Hasaki, Japan · 19418 days ago · 22 km deep · 73 km away
  4. 4.045 km ESE of Takahagi, Japan · 19416 days ago · 38 km deep · 23 km away
  5. 4.67 km WNW of Tsukuba, Japan · 19415 days ago · 81 km deep · 86 km away
  6. 4.68 km ENE of Funaishikawa, Japan · 19411 days ago · 61 km deep · 29 km away
  7. 4.354 km E of ?arai, Japan · 19403 days ago · 40 km deep · 28 km away
  8. 3.58 km NNW of Funaishikawa, Japan · 19391 days ago · 53 km deep · 40 km away
  9. 4.257 km ESE of Takahagi, Japan · 19383 days ago · 25 km deep · 39 km away

Before

  1. 4.24 km ENE of Iwai, Japan · 19436 days ago · 63 km deep · 97 km away
  2. 4.371 km ESE of Kitaibaraki, Japan · 19447 days ago · 45 km deep · 58 km away
  3. 3.856 km SE of Iwaki, Japan · 19450 days ago · 50 km deep · 53 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp00002sb (also filed as iscgem758513). Read Tue, Sep 22, 2026, 10:26 PM UTC.