M4.7 earthquake 148 km W of Pangai, Tonga
A magnitude 4.7 earthquake struck 148 km W of Pangai, Tonga on Tue, Aug 1, 2017, 5:36 AM GMT+13 (16:36 UTC), 206 km (128 mi) below the surface.
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
- 2017-07-31 16:36:50 UTC
- Depth
- 206.4 km (128.3 mi), intermediate-depth
- Epicenter
- 19.875° S, 175.774° W
- Region
- Tonga
- 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 |
|---|---|---|---|
| 4.7 | mb, body-wave | USGS National Earthquake Information Center | Preferred · Reviewed · ±0.038 · 210 stations |
| 5.12 | Mw, moment | ISC-GEM global catalog | Final · ±0.1 |
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 9.0 km horizontally, 5.8 km in depth
- Magnitude uncertainty
- ±0.04
- Depth from
- From location
- Station coverage gap
- 45°
- Stations used
- 65
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 and up: 3 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.2147 km W of Pangai, Tonga · 3346 days ago · 279 km deep · 3 km away
- 4.3216 km NW of Nuku‘alofa, Tonga · 3345 days ago · 303 km deep · 88 km away
- 4.4114 km NW of Nuku‘alofa, Tonga · 3331 days ago · 227 km deep · 54 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000a2wq (also filed as iscgem610867156). Read Thu, Oct 1, 2026, 7:19 AM UTC.