M4.7 earthquake 42 km NNW of Neiafu, Tonga
A magnitude 4.7 earthquake struck 42 km NNW of Neiafu, Tonga on Wed, Aug 21, 2019, 7:21 PM GMT+13 (06:21 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M5.1 80 km NW of Neiafu, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.7 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2019-08-21 06:21:16 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 18.298° S, 174.139° 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, 1.9 km in depth
- Magnitude uncertainty
- ±0.06
- Depth from
- Operator assigned
- Station coverage gap
- 68°
- Stations used
- 37
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 and up: 4 in the 60 days after this one and 7 in the 30 days before it.
After
- 4.6107 km WNW of Neiafu, Tonga · 2587 days ago · 246 km deep · 77 km away
- 4.8104 km WNW of Neiafu, Tonga · 2573 days ago · 175 km deep · 81 km away
- 4.480 km N of Neiafu, Tonga · 2552 days ago · 160 km deep · 44 km away
- 5.180 km NW of Neiafu, Tonga · 2543 days ago · 10 km deep · 41 km away
Before
- 4.294 km W of Neiafu, Tonga · 2603 days ago · 151 km deep · 83 km away
- 4.2125 km NW of Neiafu, Tonga · 2604 days ago · 239 km deep · 88 km away
- 4.735 km NW of Neiafu, Tonga · 2617 days ago · 51 km deep · 16 km away
- 4.662 km NNW of Neiafu, Tonga · 2617 days ago · 10 km deep · 21 km away
- 4.288 km WNW of Neiafu, Tonga · 2617 days ago · 104 km deep · 69 km away
- 5.750 km NW of Neiafu, Tonga · 2618 days ago · 10 km deep · 26 km away
- 4.5103 km NW of Neiafu, Tonga · 2622 days ago · 77 km deep · 66 km away
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us600057tq. Read Mon, Oct 5, 2026, 3:30 AM UTC.