M4.5 earthquake 42 km ESE of Chitose, Japan
A magnitude 4.5 earthquake struck 42 km ESE of Chitose, Japan on Sat, Dec 22, 1984, 4:52 AM JST (19:52 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.8 37 km SSE of Shizunai-furukawach?, Japan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.5 (mb), light
- Local time
- UTC
- 1984-12-21 19:52:30 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 42.688° N, 142.144° 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: 2 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.837 km SSE of Shizunai-furukawach?, Japan · 15243 days ago · 78 km deep · 80 km away
- 4.653 km E of Shizunai-furukawach?, Japan · 15227 days ago · 46 km deep · 84 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002aa4. Read Tue, Sep 22, 2026, 7:06 AM UTC.