M5.5 earthquake 42 km W of Loncopué, Argentina
A magnitude 5.5 earthquake struck 42 km W of Loncopué, Argentina on Mon, Jan 2, 1978, 5:27 AM GMT-3 (08:27 UTC), 126 km (78 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.5 (mb, body-wave), moderate
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1978-01-02 08:27:40 UTC
- Depth
- 126.0 km (78.3 mi), intermediate-depth
- Epicenter
- 38.137° S, 71.096° W
- Region
- Argentina
- 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 |
|---|---|---|---|
| 5.5 | mb, body-wave | USGS National Earthquake Information Center | Preferred · Reviewed |
| 5.46 | Mw, moment | ISC-GEM global catalog | Final · ±0.1 |
| 5.5 | Mwc, centroid moment | Global CMT project | Preliminary |
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Stations used
- 67
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.5 and up: 0 in the 60 days after this one and 0 in the 30 days before it.
None recorded.
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000sb5 (also filed as gcmtb010278a, gcmt19780102082740, iscgem687168). Read Thu, Oct 1, 2026, 9:01 AM UTC.