M4.6 earthquake 4 km SE of Chiba, Japan
A magnitude 4.6 earthquake struck 4 km SE of Chiba, Japan on Tue, Jun 16, 1987, 12:30 AM JST (15:30 UTC), 74 km (46 mi) below the surface.
A larger quake followed: M5.0 6 km NNE of Ishige, Japan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.6 (mb), light
- Local time
- UTC
- 1987-06-15 15:30:53 UTC
- Depth
- 73.7 km (45.8 mi), intermediate-depth
- Epicenter
- 35.570° N, 140.155° 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: 7 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.130 km SW of Tateyama, Japan · 14332 days ago · 128 km deep · 99 km away
- 5.06 km NNE of Ishige, Japan · 14329 days ago · 70 km deep · 69 km away
- 4.63 km W of Sakura, Japan · 14320 days ago · 81 km deep · 16 km away
- 4.83 km NNW of Ishige, Japan · 14317 days ago · 66 km deep · 66 km away
- 4.438 km ESE of Hasaki, Japan · 14306 days ago · 33 km deep · 98 km away
- 4.23 km WNW of Tsukuba, Japan · 14302 days ago · 68 km deep · 72 km away
- 4.49 km S of Y?ki, Japan · 14292 days ago · 101 km deep · 76 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00035tp. Read Tue, Sep 22, 2026, 12:17 PM UTC.