M4.0 earthquake 274 km WNW of Pangai, Tonga
A magnitude 4.0 earthquake struck 274 km WNW of Pangai, Tonga on Mon, Mar 20, 2017, 5:09 AM GMT+13 (16:09 UTC), 385 km (239 mi) below the surface.
A larger quake followed: M4.6 Fiji region. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.0 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2017-03-19 16:09:10 UTC
- Depth
- 385.4 km (239.5 mi), deep
- Epicenter
- 18.602° S, 176.628° W
- Region
- Tonga
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
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 23.5 km horizontally, 33.4 km in depth
- Magnitude uncertainty
- ±0.18
- Depth from
- From location
- Station coverage gap
- 194°, poorly surrounded by stations
- Stations used
- 10
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.4Fiji region · 3475 days ago · 620 km deep · 96 km away
- 4.4283 km WNW of Pangai, Tonga · 3455 days ago · 297 km deep · 16 km away
- 4.4Fiji region · 3453 days ago · 372 km deep · 68 km away
- 4.5233 km WNW of Pangai, Tonga · 3449 days ago · 76 km deep · 71 km away
- 4.3Fiji region · 3434 days ago · 611 km deep · 87 km away
- 4.6Fiji region · 3431 days ago · 571 km deep · 95 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us20008udq. Read Thu, Oct 1, 2026, 6:27 AM UTC.