M4.6 earthquake 99 km ESE of Pangai, Tonga
A magnitude 4.6 earthquake struck 99 km ESE of Pangai, Tonga on Mon, Apr 23, 2018, 3:11 AM GMT+13 (14:11 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M5.7 Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.6 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2018-04-22 14:11:47 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 20.140° S, 173.466° 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 9.0 km horizontally, 1.9 km in depth
- Magnitude uncertainty
- ±0.15
- Depth from
- Operator assigned
- Station coverage gap
- 107°
- Stations used
- 17
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.6 and up: 6 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.487 km SE of Pangai, Tonga · 3085 days ago · 10 km deep · 42 km away
- 4.6103 km ESE of Pangai, Tonga · 3073 days ago · 10 km deep · 7 km away
- 5.0120 km ENE of ‘Ohonua, Tonga · 3070 days ago · 10 km deep · 91 km away
- 4.9102 km SE of Pangai, Tonga · 3064 days ago · 26 km deep · 41 km away
- 4.677 km SSE of Pangai, Tonga · 3059 days ago · 10 km deep · 58 km away
- 5.7Tonga · 3044 days ago · 13 km deep · 82 km away · felt by 1
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us1000dsq8. Read Fri, Oct 2, 2026, 1:55 PM UTC.