M4.4 earthquake 109 km S of Hihifo, Tonga
A magnitude 4.4 earthquake struck 109 km S of Hihifo, Tonga on Wed, Aug 21, 2019, 12:26 PM GMT-12 (00:26 UTC), 122 km (76 mi) below the surface.
A larger quake followed: M4.9 77 km SW of Hihifo, 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), light
- Local time
- UTC
- 2019-08-22 00:26:35 UTC
- Depth
- 121.5 km (75.5 mi), intermediate-depth
- Epicenter
- 16.947° S, 173.775° 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 11.1 km horizontally, 6.8 km in depth
- Magnitude uncertainty
- ±0.11
- Depth from
- From location
- Station coverage gap
- 66°
- Stations used
- 31
Nearby
Within 100 km, magnitude 1.5 and up: 8 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.549 km SE of Hihifo, Tonga · 2571 days ago · 37 km deep · 81 km away
- 4.977 km SW of Hihifo, Tonga · 2570 days ago · 193 km deep · 80 km away
- 4.662 km S of Hihifo, Tonga · 2570 days ago · 42 km deep · 49 km away
- 4.7147 km SSW of Hihifo, Tonga · 2564 days ago · 35 km deep · 70 km away
- 4.460 km SW of Hihifo, Tonga · 2561 days ago · 72 km deep · 71 km away
- 4.573 km SW of Hihifo, Tonga · 2560 days ago · 113 km deep · 90 km away
- 4.884 km SSW of Hihifo, Tonga · 2551 days ago · 87 km deep · 35 km away
- 4.4155 km SE of Hihifo, Tonga · 2543 days ago · 10 km deep · 96 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000596y. Read Wed, Sep 30, 2026, 6:01 AM UTC.