M4.4 earthquake 228 km S of ‘Ohonua, Tonga
A magnitude 4.4 earthquake struck 228 km S of ‘Ohonua, Tonga on Thu, Aug 19, 2021, 6:53 PM GMT+13 (05:53 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M4.8 158 km SSE of ‘Ohonua, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.4 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2021-08-19 05:53:47 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 23.385° S, 174.713° W
- Region
- Tonga
- 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.
- Location uncertainty
- About 12.5 km horizontally, 2.0 km in depth
- Magnitude uncertainty
- ±0.16
- Depth from
- Operator assigned
- Station coverage gap
- 232°, poorly surrounded by stations
- Stations used
- 14
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 0 in the 30 days before it.
After
- 4.8158 km SSE of ‘Ohonua, Tonga · 1865 days ago · 10 km deep · 95 km away
- 4.6157 km SSE of ‘Ohonua, Tonga · 1858 days ago · 10 km deep · 95 km away
- 4.3197 km SSE of ‘Ohonua, Tonga · 1851 days ago · 10 km deep · 44 km away
- 4.7171 km SSE of ‘Ohonua, Tonga · 1841 days ago · 10 km deep · 83 km away
- 4.6181 km SSW of ‘Ohonua, Tonga · 1839 days ago · 10 km deep · 79 km away
- 4.3146 km SSE of ‘Ohonua, Tonga · 1826 days ago · 10 km deep · 94 km away
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000f5rl. Read Thu, Oct 1, 2026, 3:23 AM UTC.