Japan earthquakes

M4.6 earthquake 10 km ESE of Okunoya, Japan

A magnitude 4.6 earthquake struck 10 km ESE of Okunoya, Japan on Fri, Mar 19, 1982, 5:42 PM JST (08:42 UTC), 94 km (58 mi) below the surface.

A larger quake followed: M4.9 10 km ESE of Omigawa, Japan. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
4.6 (mb), light
Local time
UTC
1982-03-19 08:42:48 UTC
Depth
93.8 km (58.3 mi), intermediate-depth
Epicenter
36.238° N, 140.513° 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.

Nearest places

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

Nearby

Within 100 km, magnitude 1.6 and up: 6 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 4.651 km SE of Iwaki, Japan · 16255 days ago · 33 km deep · 96 km away
  2. 4.03 km ENE of Honch?, Japan · 16234 days ago · 72 km deep · 73 km away
  3. 4.42 km WSW of Sakura, Japan · 16230 days ago · 60 km deep · 66 km away
  4. 4.910 km ESE of Omigawa, Japan · 16228 days ago · 66 km deep · 50 km away
  5. 4.82 km SSW of Sakai, Japan · 16227 days ago · 65 km deep · 68 km away
  6. 4.531 km E of ?arai, Japan · 16222 days ago · 87 km deep · 38 km away

Before

  1. 4.85 km WSW of Chiba, Japan · 16259 days ago · 74 km deep · 84 km away
  2. 4.452 km ESE of Hitachi, Japan · 16270 days ago · 33 km deep · 63 km away
  3. 5.68 km WNW of Hitachi-Naka, Japan · 16270 days ago · 68 km deep · 23 km away
  4. 4.14 km SSW of Matsudo, Japan · 16278 days ago · 107 km deep · 79 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0001k72. Read Tue, Sep 22, 2026, 10:18 AM UTC.