M5.4 earthquake 111 km E of Pangai, Tonga
A magnitude 5.4 earthquake struck 111 km E of Pangai, Tonga on Fri, Aug 4, 2017, 12:43 PM GMT+13 (23:43 UTC), 10 km (6 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.4 (Mww, W-phase moment), moderate
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2017-08-03 23:43:27 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 19.914° S, 173.298° W
- Region
- Tonga
- Felt reports
- 1
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Magnitude estimates
Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.
| Mag. | Scale | Computed by | Notes |
|---|---|---|---|
| 5.4 | Mww, W-phase moment | USGS National Earthquake Information Center | Preferred · Reviewed · ±0.071 · 19 stations |
| 5.36 | Mw, moment | ISC-GEM global catalog | Final · ±0.1 |
Did you feel it?
1 person reported to the USGS what they felt; the strongest reported shaking was I, not felt shaking.
Fault motion and ground failure
How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.
- Faulting
- Reverse (thrust)
- Moment magnitude
- 5.4 Mww
- Nodal plane 1
- Strike 37°, dip 44°, rake 119°
- Nodal plane 2
- Strike 179°, dip 52°, rake 65°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 8.4 km horizontally, 1.7 km in depth
- Magnitude uncertainty
- ±0.07
- Depth from
- Operator assigned
- Station coverage gap
- 25°
- Stations used
- 544
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.4 and up: 10 in the 60 days after this one and 9 in the 30 days before it.
After
- 5.0121 km ESE of Pangai, Tonga · 3343 days ago · 10 km deep · 18 km away
- 4.4125 km E of Pangai, Tonga · 3338 days ago · 10 km deep · 26 km away
- 4.9Tonga · 3337 days ago · 10 km deep · 91 km away
- 4.6137 km SE of Neiafu, Tonga · 3328 days ago · 10 km deep · 61 km away
- 4.7151 km ESE of Pangai, Tonga · 3327 days ago · 10 km deep · 56 km away
- 4.6135 km ESE of Pangai, Tonga · 3317 days ago · 10 km deep · 38 km away
- 4.334 km E of Pangai, Tonga · 3309 days ago · 35 km deep · 79 km away
- 4.8112 km ESE of Pangai, Tonga · 3309 days ago · 10 km deep · 24 km away
- 4.5119 km E of Pangai, Tonga · 3303 days ago · 10 km deep · 12 km away
- 4.447 km ESE of Pangai, Tonga · 3302 days ago · 10 km deep · 68 km away
Before
- 4.5116 km SE of Pangai, Tonga · 3351 days ago · 10 km deep · 71 km away
- 4.787 km SE of Pangai, Tonga · 3359 days ago · 10 km deep · 66 km away
- 5.087 km ESE of Pangai, Tonga · 3359 days ago · 10 km deep · 36 km away
- 4.493 km ESE of Pangai, Tonga · 3362 days ago · 10 km deep · 43 km away
- 4.6117 km ESE of Neiafu, Tonga · 3366 days ago · 10 km deep · 99 km away
- 5.7119 km ESE of Pangai, Tonga · 3366 days ago · 7 km deep · 52 km away
- 5.6112 km ESE of Pangai, Tonga · 3366 days ago · 16 km deep · 55 km away
- 4.6108 km ESE of Pangai, Tonga · 3369 days ago · 10 km deep · 31 km away
- 4.9111 km ESE of Pangai, Tonga · 3374 days ago · 10 km deep · 24 km away
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000a4ca (also filed as iscgem615092863). Read Sun, Oct 4, 2026, 12:25 AM UTC.