M5.5 earthquake 60 km WSW of Yonakuni, Japan
A magnitude 5.5 earthquake struck 60 km WSW of Yonakuni, Japan on Tue, Jul 20, 1971, 12:58 AM GMT+8 (16:58 UTC), 53 km (33 mi) below the surface.
A larger quake followed: M6.0 31 km E of Hualien City, Taiwan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.5 (mw), moderate
- Local time
- UTC
- 1971-07-19 16:58:09 UTC
- Depth
- 52.5 km (32.6 mi), shallow
- Epicenter
- 24.277° N, 122.436° 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.
- Magnitude uncertainty
- ±0.48
- Depth from
- From location
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.5 and up: 2 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem782468. Read Tue, Sep 22, 2026, 11:14 AM UTC.