M6.6 earthquake 136 km W of Neiafu, Tonga
A magnitude 6.6 earthquake struck 136 km W of Neiafu, Tonga on Tue, Nov 5, 2019, 11:43 AM GMT+13 (22:43 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
- 6.6 (mww), strong
- Local time
- UTC
- 2019-11-04 22:43:32 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 18.575° S, 175.272° W
- Region
- Tonga
- Felt reports
- 8
- Strongest shaking
- IV, light shaking
- PAGER alert
- Green
- Tsunami flag
- Yes: a large quake in an oceanic region
- Status
- Reviewed by a seismologist
Tsunami
The USGS flags a quake this large in an oceanic region. The flag does not mean a tsunami happened; the tsunami warning centers decide that, and their messages are below when they issued any.
Current tsunami warnings: tsunami.gov. Warnings in force in the US also appear on our alerts pages.
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
- Peak ground acceleration
- 4.5% of gravity
- Peak ground velocity
- 1.3 cm/s
- Map
- Automatic
Did you feel it?
8 people reported to the USGS what they felt; the strongest reported shaking was IV, light shaking.
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
- Strike-slip
- Moment magnitude
- 6.6 Mww
- Nodal plane 1
- Strike 200°, dip 70°, rake 8°
- Nodal plane 2
- Strike 108°, dip 83°, rake 160°
- Landslide alert
- Green
- Liquefaction alert
- Green
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 8.3 km horizontally, 1.8 km in depth
- Magnitude uncertainty
- ±0.04
- Depth from
- Operator assigned
- Station coverage gap
- 48°
- Stations used
- 159
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 3.6 and up: 8 in the 60 days after this one and 1 in the 30 days before it.
After
- 5.5181 km W of Neiafu, Tonga · 2521 days ago · 10 km deep · 45 km away
- 4.9137 km W of Neiafu, Tonga · 2521 days ago · 10 km deep · 3 km away
- 5.5146 km W of Neiafu, Tonga · 2514 days ago · 10 km deep · 16 km away
- 6.2147 km W of Neiafu, Tonga · 2514 days ago · 10 km deep · 34 km away · felt by 6
- 4.3118 km NW of Pangai, Tonga · 2496 days ago · 238 km deep · 64 km away
- 4.3174 km W of Neiafu, Tonga · 2486 days ago · 214 km deep · 38 km away
- 4.4133 km WNW of Pangai, Tonga · 2478 days ago · 120 km deep · 71 km away
- 4.6120 km WNW of Neiafu, Tonga · 2477 days ago · 139 km deep · 63 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000635e (also filed as pt19308001, at00q0gv4p, iscgem616747937). Read Wed, Sep 30, 2026, 6:58 AM UTC.