Japan earthquakes

M5.8 earthquake 174 km SSE of Hiroo, Japan

A magnitude 5.8 earthquake struck 174 km SSE of Hiroo, Japan on Tue, Aug 17, 1971, 12:41 AM JST (15:41 UTC), 26 km (16 mi) below the surface.

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The earthquake

Magnitude
5.8 (mw), moderate
Local time
UTC
1971-08-16 15:41:19 UTC
Depth
26.4 km (16.4 mi), shallow
Epicenter
40.832° N, 144.099° 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: 1 in the 60 days after this one and 2 in the 30 days before it.

After

  1. 5.1146 km SSE of Honchō, Japan · 20116 days ago · 39 km deep · 29 km away

Before

  1. 5.6100 km SSE of Honchō, Japan · 20140 days ago · 50 km deep · 74 km away
  2. 7.090 km SSE of Honchō, Japan · 20140 days ago · 50 km deep · 85 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event iscgem781303. Read Tue, Sep 22, 2026, 11:15 AM UTC.