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M4.4 Earthquake near Municipio de Saujil, Argentina — 16 December 2024

A light earthquake of magnitude 4.4 was recorded near Municipio de Saujil, Argentina on , with an epicentre 51 km east-southeast of Londres, at a focal depth of 171.4 km. It ranked as the 7th strongest of 16 earthquakes recorded in Argentina in the preceding 30 days.

4.4 Light

Time (UTC): 2024-12-16 17:28:36

Time (your timezone): —

Magnitude: 4.4 (light)

Focal depth: 171.4 km (intermediate)

Epicentre: -27.9457, -66.6752

Location: 51 km ESE of Londres, Argentina

Country: Argentina

USGS link to NOAA tsunami information: Not linked

Review status: Reviewed

Source: USGS event page

How strong was this earthquake?

Light earthquakes are widely felt near the epicentre and can rattle windows, dishes and hanging objects. Damage is uncommon and usually limited to cracked plaster or fallen loose items.

A magnitude 4.4 earthquake radiates roughly 60 tons of TNT equivalent in seismic energy.

The USGS assigns this earthquake a significance score of 298, which is below the USGS threshold of more than 600 for its significant-earthquake list. The ranking combines magnitude with available Did You Feel It responses and PAGER alert level; it is not a direct measurement of damage.

What the magnitude scale actually measures →

When it happened locally

That is about 13:01 local solar time at the epicentre, around midday.

This event was deeper than 51% of the 387 earthquakes recorded in Argentina in our catalogue and stronger than 31% of them.

Where was the epicentre?

The epicentre was located at -27.9457, -66.6752 — 51 km east-southeast of Londres. The closest other recorded event was a magnitude 4.2 earthquake 2 km southeast of here on 30 December 2025.

The nearest other settlements in our records are Andalgalá (6 km east), Arauco (18 km south-southwest), Londres (23 km west-southwest) and Mutquín (63 km southeast).

Why the 171 km depth matters

At 171 km this was an intermediate-depth earthquake. Energy from events at this depth spreads out before it reaches the surface, which usually means weaker shaking near the epicentre than a shallow quake of the same magnitude, but shaking felt across a wider area.

This catalogue does not ingest eyewitness responses, so it cannot confirm where this earthquake was felt. Based on magnitude alone, an event this size is often felt across the surrounding area. Its intermediate depth normally reduces peak shaking near the epicentre compared with a shallow event of the same magnitude.

Read more on how focal depth changes what you feel →

What does the tsunami information flag mean?

The USGS record does not carry a link to NOAA tsunami information. That field is not an all-clear and does not state whether a tsunami occurred. In this case, a damaging tsunami would be less likely because at M4.4 it falls below the magnitude 6.5 threshold that generally applies before a submarine earthquake displaces enough water to generate a damaging tsunami; its 171 km focal depth is too great to deform the sea floor significantly; it occurred inland rather than beneath the sea floor. For an active coastal alert, use tsunami.gov or your local warning authority.

How earthquakes generate tsunamis, and what the alert levels mean →

Aftershocks and local seismic history

No further earthquakes have been recorded within about 150 km of the epicentre in the seven days after this event.

26 earthquakes of magnitude 4 or above have been logged within roughly 200 km of this epicentre in our catalogue. The strongest was a magnitude 5.9 event near Tinogasta on 24 December 2024. This M4.4 event released about 178 times less energy than that event.

No other earthquakes have been recorded within 100 km of this epicentre in the past year, which makes this a genuinely isolated event.

How long aftershock sequences last, and how large they get →

Where this event sits in the record

This earthquake is part of the December 2024 worldwide record, and of earthquakes in Argentina during December 2024. Browse the full monthly archive to compare periods.

Nearest recorded earthquakes to this epicentre

Other recent earthquakes in Argentina

All recorded earthquakes in Argentina →

Other magnitude 4 earthquakes worldwide

All magnitude 4 earthquakes →

Questions about this earthquake

How strong was the earthquake near Municipio de Saujil?

It measured magnitude 4.4 — a light earthquake. A magnitude 4.4 earthquake radiates roughly 60 tons of TNT equivalent in seismic energy.

How deep was the earthquake near Municipio de Saujil?

The focus was 171 km below the surface, which counts as intermediate.

Was the Municipio de Saujil earthquake felt at the surface?

At magnitude 4.4 and a focal depth of 171 km, the depth spreads the energy out, so shaking is weaker overhead but reaches further.

When did the earthquake near Municipio de Saujil happen?

16 December 2024 at 17:28 UTC.

Was there a tsunami?

No. The USGS record carries no tsunami-information link for this event.

Have there been aftershocks?

No further earthquakes have been recorded within about 150 km of the epicentre in the seven days after this event.

How often do earthquakes happen near Municipio de Saujil?

26 earthquakes of magnitude 4 or above have been logged within roughly 200 km of this epicentre in our catalogue. The strongest was a magnitude 5.9 event near Tinogasta on 24 December 2024. This M4.4 event released about 178 times less energy than that event.