M5.7 earthquake 119 km ESE of Pangai, Tonga
A magnitude 5.7 earthquake struck 119 km ESE of Pangai, Tonga on Mon, Jul 17, 2017, 2:20 PM GMT+13 (01:20 UTC), 7 km (4 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.7 (Mww, W-phase moment), moderate
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2017-07-17 01:20:32 UTC
- Depth
- 7.0 km (4.3 mi), shallow
- Epicenter
- 20.374° S, 173.374° W
- Region
- Tonga
- Strongest shaking
- IV, light shaking
- PAGER alert
- Green
- 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 |
|---|---|---|---|
| 5.7 | Mww, W-phase moment | USGS National Earthquake Information Center | Preferred · Reviewed · ±0.089 · 12 stations |
| 5.69 | Mw, moment | ISC-GEM global catalog | Final · ±0.1 |
| 5.8 | Mwb, body-wave moment | USGS National Earthquake Information Center | Moment tensor · Reviewed |
Shaking
The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.
- Strongest estimated
- IV, light shaking
- Map
- Automatic
Did you feel it?
No one has reported feeling this quake to the USGS.
Estimated impact
The USGS PAGER system estimates deaths and economic losses from the shaking and the population and buildings exposed to it.
- Alert level
- Green: little or no damage or loss of life expected
| Range | Chance |
|---|---|
| Under 1 | 65% |
| 1 to 10 | 30% |
| 10 to 100 | 4% |
| 100 to 1,000 | Under 1% |
| 1,000 to 10,000 | Under 1% |
| 10,000 to 100,000 | Under 1% |
| 100,000 to 10,000,000 | Under 1% |
| Range, million USD | Chance |
|---|---|
| Under 1 | 65% |
| 1 to 10 | 30% |
| 10 to 100 | 4% |
| 100 to 1,000 | Under 1% |
| 1,000 to 10,000 | Under 1% |
| 10,000 to 100,000 | Under 1% |
| 100,000 to 10,000,000 | Under 1% |
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
- 5.7 Mww
- Nodal plane 1
- Strike 214°, dip 33°, rake 82°
- Nodal plane 2
- Strike 44°, dip 58°, rake 95°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 8.4 km horizontally, 1.7 km in depth
- Magnitude uncertainty
- ±0.09
- Depth from
- From modeling of broad-band P waveforms
- Station coverage gap
- 26°
- Stations used
- 124
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.7 and up: 13 in the 60 days after this one and 7 in the 30 days before it.
After
- 4.9101 km ENE of ‘Ohonua, Tonga · 3363 days ago · 10 km deep · 94 km away
- 4.493 km ESE of Pangai, Tonga · 3362 days ago · 10 km deep · 27 km away
- 5.087 km ESE of Pangai, Tonga · 3359 days ago · 10 km deep · 37 km away
- 4.787 km SE of Pangai, Tonga · 3359 days ago · 10 km deep · 37 km away
- 4.5116 km SE of Pangai, Tonga · 3350 days ago · 10 km deep · 23 km away
- 5.4111 km E of Pangai, Tonga · 3348 days ago · 10 km deep · 52 km away · felt by 1
- 5.0121 km ESE of Pangai, Tonga · 3343 days ago · 10 km deep · 38 km away
- 4.4125 km E of Pangai, Tonga · 3337 days ago · 10 km deep · 77 km away
- 4.9Tonga · 3337 days ago · 10 km deep · 44 km away
- 4.7151 km ESE of Pangai, Tonga · 3327 days ago · 10 km deep · 38 km away
- 4.6135 km ESE of Pangai, Tonga · 3317 days ago · 10 km deep · 31 km away
- 4.334 km E of Pangai, Tonga · 3309 days ago · 35 km deep · 97 km away
- 4.8112 km ESE of Pangai, Tonga · 3309 days ago · 10 km deep · 27 km away
Before
- 5.6112 km ESE of Pangai, Tonga · 3366 days ago · 16 km deep · 9 km away
- 4.6108 km ESE of Pangai, Tonga · 3369 days ago · 10 km deep · 21 km away
- 4.9111 km ESE of Pangai, Tonga · 3374 days ago · 10 km deep · 28 km away
- 4.4132 km ESE of Pangai, Tonga · 3380 days ago · 35 km deep · 14 km away
- 4.279 km SE of Pangai, Tonga · 3385 days ago · 35 km deep · 56 km away
- 4.6112 km SE of Pangai, Tonga · 3385 days ago · 10 km deep · 35 km away
- 4.7128 km ENE of ‘Ohonua, Tonga · 3393 days ago · 10 km deep · 82 km away
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us20009wu6 (also filed as iscgem611834367). Read Sat, Oct 3, 2026, 11:16 PM UTC.