M5.2 earthquake 52 km N of Kolonga, Tonga
A magnitude 5.2 earthquake struck 52 km N of Kolonga, Tonga on Wed, Jul 22, 2015, 4:58 AM GMT+13 (15:58 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
- 5.2 (mb, body-wave), moderate
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2015-07-21 15:58:04 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 20.665° S, 175.027° W
- Region
- Tonga
- Felt reports
- 2
- 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 |
|---|---|---|---|
| 5.2 | mb, body-wave | USGS National Earthquake Information Center | Preferred · Reviewed · ±0.041 · 192 stations |
| 5.26 | Mw, moment | ISC-GEM global catalog | Final · ±0.1 |
What happened
The USGS’s account of the effects of this earthquake.
Felt at Haveluloto and Tofoa-Koloua.
From the USGS event page for us20002ywd. U.S. Geological Survey text and figures are in the public domain.
Did you feel it?
2 people reported to the USGS what they felt; the strongest reported shaking was III, weak shaking.
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 10.2 km horizontally, 1.7 km in depth
- Magnitude uncertainty
- ±0.04
- Depth from
- Operator assigned
- Station coverage gap
- 43°
- Stations used
- 249
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.2 and up: 5 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.073 km NE of Kolonga, Tonga · 4089 days ago · 430 km deep · 51 km away
- 4.132 km SW of Vaini, Tonga · 4088 days ago · 154 km deep · 92 km away
- 4.3106 km WSW of Pangai, Tonga · 4086 days ago · 231 km deep · 74 km away
- 4.669 km N of Nuku‘alofa, Tonga · 4085 days ago · 115 km deep · 27 km away
- 4.455 km NNE of Kolonga, Tonga · 4041 days ago · 146 km deep · 20 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us20002ywd (also filed as iscgem607503839). Read Mon, Oct 5, 2026, 2:47 AM UTC.