Argentina earthquakes

M5.5 earthquake 50 km E of Caucete, Argentina

A magnitude 5.5 earthquake struck 50 km E of Caucete, Argentina on Mon, Nov 28, 1977, 1:19 AM GMT-3 (04:19 UTC), 36 km (22 mi) below the surface.

A larger quake followed: M5.8 79 km S of San Agustín de Valle Fértil, Argentina. This one was a foreshock.

Caucete forecast More in Argentina

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 5.5 (mb), moderate
Local time: Mon, Nov 28, 1977, 1:19 AM GMT-3
UTC: 1977-11-28 04:19:35 UTC
Depth: 36.0 km (22.4 mi), shallow
Epicenter: 31.681° S, 67.754° W
Region: Argentina
Strongest shaking: V, moderate shaking
Tsunami flag: No
Status: Reviewed by a seismologist

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated: V, moderate shaking
Peak ground acceleration: 9.8% of gravity
Peak ground velocity: 1.3 cm/s
Map: Automatic

USGS ShakeMap: estimated shaking intensity around the epicenter — Estimated shaking intensity. Map: USGS ShakeMap.

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: 130

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 2.5 and up: 36 in the 60 days after this one and 66 in the 30 days before it.

After

Before

Earthquakes today Argentina earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0000rue (also filed as gcmtb112877b, gcmt19771128041935, iscgem691077). Read Tue, Sep 22, 2026, 9:01 PM UTC.