Japan earthquakes

M4.6 earthquake 25 km ESE of It?, Japan

A magnitude 4.6 earthquake struck 25 km ESE of It?, Japan on Mon, May 11, 1987, 3:56 PM JST (06:56 UTC), 31 km (20 mi) below the surface.

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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, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
1987-05-11 06:56:38 UTC
Depth
31.4 km (19.5 mi), shallow
Epicenter
34.850° N, 139.329° E
Region
Japan
Tsunami flag
No
Status
Reviewed by a seismologist

What happened

The USGS’s account of the effects of this earthquake.

Felt (III JMA) on Oshima and at Ajiro and Tateyama; (II JMA) at Tokyo, Mishima and Kofu; (I JMA) at Yokohama and Kumagaya.

From the USGS event page for usp00034wz. U.S. Geological Survey text and figures are in the public domain.

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: 1 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 4.130 km SW of Tateyama, Japan · 14344 days ago · 128 km deep · 26 km away

Before

  1. 4.627 km ESE of It?, Japan · 14391 days ago · 27 km deep · 2 km away
  2. 4.130 km ESE of It?, Japan · 14392 days ago · 23 km deep · 5 km away
  3. 4.119 km SE of It?, Japan · 14392 days ago · 27 km deep · 7 km away
  4. 3.918 km SE of It?, Japan · 14392 days ago · 22 km deep · 11 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp00034wz. Read Sun, Oct 4, 2026, 8:55 AM UTC.