M4.5 earthquake 86 km SE of Pangai, Tonga
A magnitude 4.5 earthquake struck 86 km SE of Pangai, Tonga on Sat, Oct 16, 2021, 10:12 AM GMT+13 (21:12 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M4.9 81 km ENE of ‘Ohonua, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.5 (mb), light
- Local time
- UTC
- 2021-10-15 21:12:44 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 20.266° S, 173.683° 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 5.6 km horizontally, 1.9 km in depth
- Magnitude uncertainty
- ±0.14
- Depth from
- Operator assigned
- Station coverage gap
- 105°
- Stations used
- 25
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 3 in the 60 days after this one and 5 in the 30 days before it.
After
- 4.887 km E of Pangai, Tonga · 1785 days ago · 10 km deep · 58 km away · felt by 1
- 4.4149 km SE of Pangai, Tonga · 1775 days ago · 10 km deep · 72 km away
- 4.981 km ENE of ‘Ohonua, Tonga · 1767 days ago · 10 km deep · 100 km away
Before
- 4.799 km ENE of Pangai, Tonga · 1818 days ago · 10 km deep · 95 km away
- 4.761 km SSW of Pangai, Tonga · 1831 days ago · 35 km deep · 87 km away
- 4.433 km SSE of Pangai, Tonga · 1831 days ago · 10 km deep · 60 km away
- 4.6121 km E of ‘Ohonua, Tonga · 1834 days ago · 10 km deep · 99 km away
- 4.8121 km ENE of ‘Ohonua, Tonga · 1835 days ago · 10 km deep · 68 km away
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000fw65. Read Wed, Sep 30, 2026, 12:21 PM UTC.