M4.0 earthquake 14 km SSW of It?, Japan
A magnitude 4.0 earthquake struck 14 km SSW of It?, Japan on Fri, Nov 21, 1986, 11:04 PM JST (14:04 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M6.0 59 km ESE of Shimoda, Japan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.0 (mb), light
- Local time
- UTC
- 1986-11-21 14:04:50 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 34.845° N, 139.016° 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.
- Depth from
- OPERATOR_ASSIGNED
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 10 in the 60 days after this one and 12 in the 30 days before it.
After
- 3.933 km ESE of Shimoda, Japan · 14557 days ago · 10 km deep · 40 km away
- 4.633 km E of Shimoda, Japan · 14557 days ago · 8 km deep · 35 km away
- 4.459 km ESE of Shimoda, Japan · 14557 days ago · 10 km deep · 67 km away
- 4.554 km ESE of Shimoda, Japan · 14557 days ago · 10 km deep · 59 km away
- 6.059 km ESE of Shimoda, Japan · 14557 days ago · 9 km deep · 65 km away
- 4.046 km ESE of Shimoda, Japan · 14556 days ago · 10 km deep · 54 km away
- 4.052 km ESE of Shimoda, Japan · 14555 days ago · 10 km deep · 58 km away
- 4.247 km ESE of Shimoda, Japan · 14555 days ago · 10 km deep · 53 km away
- 4.269 km ESE of Shimoda, Japan · 14553 days ago · 10 km deep · 77 km away
- 4.161 km SE of Shimoda, Japan · 14553 days ago · 10 km deep · 70 km away
Before
- 4.142 km ESE of Shimoda, Japan · 14557 days ago · 10 km deep · 46 km away
- 4.127 km E of Shimoda, Japan · 14557 days ago · 10 km deep · 27 km away
- 4.740 km ESE of Shimoda, Japan · 14557 days ago · 10 km deep · 50 km away
- 4.435 km E of Shimoda, Japan · 14557 days ago · 10 km deep · 35 km away
- 4.238 km E of Shimoda, Japan · 14557 days ago · 10 km deep · 40 km away
- 4.133 km ESE of Shimoda, Japan · 14557 days ago · 10 km deep · 41 km away
- 4.127 km E of Shimoda, Japan · 14557 days ago · 10 km deep · 28 km away
- 4.524 km ESE of Shimoda, Japan · 14557 days ago · 10 km deep · 30 km away
- 5.034 km E of Shimoda, Japan · 14557 days ago · 10 km deep · 33 km away
- 5.140 km ESE of Shimoda, Japan · 14557 days ago · 10 km deep · 45 km away
- 4.443 km SW of Tateyama, Japan · 14557 days ago · 10 km deep · 45 km away
- 4.340 km E of Shimoda, Japan · 14557 days ago · 10 km deep · 42 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp000308g. Read Tue, Sep 29, 2026, 4:22 PM UTC.