M5.1 earthquake 39 km WSW of Hihifo, Tonga
A magnitude 5.1 earthquake struck 39 km WSW of Hihifo, Tonga on Thu, Jun 21, 2018, 3:03 PM GMT+13 (02:03 UTC), 120 km (75 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.1 (Mww, W-phase moment), moderate
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2018-06-21 02:03:30 UTC
- Depth
- 120.1 km (74.6 mi), intermediate-depth
- Epicenter
- 16.137° S, 174.114° W
- Region
- Tonga
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Magnitude estimates
Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.
| Mag. | Scale | Computed by | Notes |
|---|---|---|---|
| 5.1 | Mww, W-phase moment | USGS National Earthquake Information Center | Preferred · Reviewed · ±0.098 · 10 stations |
| 5.14 | Mw, moment | ISC-GEM global catalog | Final · ±0.1 |
Did you feel it?
No one has reported feeling this quake to the USGS.
Fault motion and ground failure
How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.
- Faulting
- Oblique reverse
- Moment magnitude
- 5.1 Mww
- Nodal plane 1
- Strike 52°, dip 52°, rake 42°
- Nodal plane 2
- Strike 293°, dip 59°, rake 133°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 8.6 km horizontally, 3.2 km in depth
- Magnitude uncertainty
- ±0.10
- Depth from
- From location
- Station coverage gap
- 73°
- Stations used
- 160
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.1 and up: 6 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.256 km NNE of Hihifo, Tonga · 3006 days ago · 90 km deep · 93 km away
- 4.623 km NNW of Hihifo, Tonga · 2994 days ago · 60 km deep · 51 km away
- 4.575 km SSW of Hihifo, Tonga · 2982 days ago · 10 km deep · 57 km away
- 4.2111 km S of Hihifo, Tonga · 2976 days ago · 135 km deep · 93 km away
- 4.2107 km WNW of Hihifo, Tonga · 2976 days ago · 260 km deep · 84 km away
- 4.2119 km WNW of Hihifo, Tonga · 2973 days ago · 278 km deep · 97 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us1000ex10 (also filed as iscgem615000795). Read Fri, Oct 2, 2026, 8:03 PM UTC.