M4.4 earthquake 117 km WSW of Hihifo, Tonga
A magnitude 4.4 earthquake struck 117 km WSW of Hihifo, Tonga on Thu, Apr 19, 2018, 8:50 PM GMT-12 (08:50 UTC), 275 km (171 mi) below the surface.
A larger quake followed: M5.6 91 km NW of Hihifo, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.4 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2018-04-20 08:50:33 UTC
- Depth
- 274.5 km (170.6 mi), intermediate-depth
- Epicenter
- 16.270° S, 174.846° 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 10.9 km horizontally, 7.7 km in depth
- Magnitude uncertainty
- ±0.07
- Depth from
- From location
- Station coverage gap
- 67°
- Stations used
- 70
Nearby
Within 100 km, magnitude 1.5 and up: 3 in the 60 days after this one and 3 in the 30 days before it.
After
- 5.691 km NW of Hihifo, Tonga · 3085 days ago · 10 km deep · 98 km away
- 4.3137 km SSW of Hihifo, Tonga · 3064 days ago · 134 km deep · 90 km away
- 4.2123 km W of Hihifo, Tonga · 3028 days ago · 249 km deep · 45 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us1000dp46. Read Fri, Oct 2, 2026, 10:10 AM UTC.