M4.0 earthquake 240 km W of Hihifo, Tonga
A magnitude 4.0 earthquake struck 240 km W of Hihifo, Tonga on Mon, Sep 28, 2020, 2:40 AM GMT-12 (14:40 UTC), 354 km (220 mi) below the surface.
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
- 2020-09-28 14:40:01 UTC
- Depth
- 354.0 km (220.0 mi), deep
- Epicenter
- 16.065° S, 176.043° 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 9.2 km horizontally, 9.4 km in depth
- Magnitude uncertainty
- ±0.12
- Depth from
- From location
- Station coverage gap
- 62°
- Stations used
- 29
Nearby
Within 100 km, magnitude 1.5 and up: 0 in the 60 days after this one and 0 in the 30 days before it.
None recorded.
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000c4qv. Read Sat, Oct 3, 2026, 6:48 AM UTC.