M5.4 earthquake 152 km NE of Neiafu, Tonga
A magnitude 5.4 earthquake struck 152 km NE of Neiafu, Tonga on Thu, Jul 15, 2021, 10:01 PM GMT-12 (10:01 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
- 5.4 (mww), moderate
- Local time
- UTC
- 2021-07-16 10:01:59 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 17.600° S, 173.054° W
- Region
- Tonga
- Strongest shaking
- III, weak shaking
- PAGER alert
- Green
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Shaking
The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.
- Strongest estimated
- III, weak shaking
- Peak ground acceleration
- 0.3% of gravity
- Peak ground velocity
- -1.5 cm/s
- 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% |
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 7.8 km horizontally, 1.5 km in depth
- Magnitude uncertainty
- ±0.09
- Depth from
- Operator assigned
- Station coverage gap
- 66°
- Stations used
- 138
Nearby
Within 100 km, magnitude 2.4 and up: 6 in the 60 days after this one and 2 in the 30 days before it.
After
- 5.1228 km SE of Hihifo, Tonga · 1897 days ago · 10 km deep · 96 km away
- 4.8208 km SE of Hihifo, Tonga · 1894 days ago · 10 km deep · 69 km away
- 4.8189 km NE of Neiafu, Tonga · 1883 days ago · 10 km deep · 45 km away
- 5.0102 km SSE of Hihifo, Tonga · 1879 days ago · 35 km deep · 97 km away
- 4.9125 km N of Neiafu, Tonga · 1870 days ago · 57 km deep · 80 km away
- 4.7232 km SE of Hihifo, Tonga · 1856 days ago · 10 km deep · 92 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000emgs (also filed as iscgem620831717). Read Wed, Sep 30, 2026, 2:45 AM UTC.