M4.6 earthquake 119 km SSW of Lotofag?, Samoa
A magnitude 4.6 earthquake struck 119 km SSW of Lotofag?, Samoa on Sat, Apr 11, 1987, 8:31 AM GMT-11 (19:31 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.8 129 km NE 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
- 4.6 (mb), light
- Local time
- UTC
- 1987-04-11 19:31:00 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 14.904° S, 172.429° W
- Region
- Samoa
- 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.
- Depth from
- OPERATOR_ASSIGNED
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.6 and up: 3 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.8129 km NE of Hihifo, Tonga · 14402 days ago · 33 km deep · 67 km away
- 4.857 km SSW of Gataivai, Samoa · 14386 days ago · 33 km deep · 72 km away
- 4.551 km SSW of Mulifanua, Samoa · 14358 days ago · 70 km deep · 77 km away
Before
Earthquakes todaySamoa earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp000343b. Read Wed, Sep 30, 2026, 2:33 AM UTC.