M5.5 earthquake 51 km SW of Yonakuni, Japan
A magnitude 5.5 earthquake struck 51 km SW of Yonakuni, Japan on Sun, Mar 13, 1966, 1:59 AM GMT+8 (17:59 UTC), 49 km (31 mi) below the surface.
A larger quake followed: M6.2 51 km S of Yonakuni, Japan. 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, moment), moderate
- Magnitude from
- ISC-GEM global catalog
- Local time
- UTC
- 1966-03-12 17:59:36 UTC
- Depth
- 49.3 km (30.6 mi), shallow
- Epicenter
- 24.179° N, 122.601° 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
- ±0.31
- 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: 4 in the 60 days after this one and 1 in the 30 days before it.
After
- 5.748 km SW of Yonakuni, Japan · 22115 days ago · 47 km deep · 3 km away
- 6.251 km S of Yonakuni, Japan · 22108 days ago · 45 km deep · 41 km away
- 6.246 km WSW of Yonakuni, Japan · 22064 days ago · 50 km deep · 8 km away
- 5.574 km SSW of Yonakuni, Japan · 22063 days ago · 21 km deep · 45 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem849169. Read Thu, Oct 1, 2026, 3:22 PM UTC.