M6.4 Earthquake 26 km SW of Pocito, Argentina — January 19, 2021
2021-01-19 02:46:22 UTC (2021-01-19) · approx. 9:46 PM UTC-5 local
Felt by 566 people across surrounding communities. Maximum shaking intensity MMI 7.0 (severe).
On January 19, 2021 at 02:46 UTC, a magnitude 6.4 shallow crustal earthquake struck 26 km SW of Pocito, Argentina, at a depth of 20.8 km and coordinates -31.8334°, -68.7992°. The earthquake was reported felt by 566 peopleacross surrounding communities, with a maximum shaking intensity of Modified Mercalli Intensity (MMI) 7.0 (severe). The USGS PAGER system issued a yellow alert level for this event, indicating local impact possible. The nearest populated place is Pocito (population 40,969).
Physical scale: An earthquake of magnitude 6.4 releases seismic energy equivalent to roughly 60 kilotons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 16 km — a useful intuition for the size of the slip patch on the fault.
Nearest Populated Places
What the Shaking Felt Like
At MMI 7.0 (severe), people in the most strongly affected areas would have experienced: Very strong shaking. Difficult to stand. Damage to weak structures; slight damage to well-built structures. Furniture broken. Fallen plaster and loose bricks.
ShakeMap — predicted shaking intensity
Modeled ground-motion intensity contoured on the Modified Mercalli scale (MMI). Computed by the USGS from the moment-tensor solution and regional ground-motion prediction equations.
Source: U.S. Geological Survey ShakeMap. View interactive ShakeMap on USGS
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 566 citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Population exposure (USGS PAGER)
Estimated population that experienced each level of shaking. Based on the USGS PAGER rapid impact assessment, which combines ShakeMap output with global population grids.
| Shaking intensity (MMI) | Description | Population exposed |
|---|---|---|
| MMI 3 | weak | 12,477,033 |
| MMI 4 | light | 3,560,478 |
| MMI 5 | moderate | 295,113 |
| MMI 6 | strong | 671,955 |
| MMI 7 | very strong | 2,495 |
Earthquake Details
-68.7992°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 6.4 earthquake near Pocito, Argentina?
The magnitude 6.4 earthquake that struck 26 km SW of Pocito, Argentina on January 19, 2021 at 02:46 UTC had a depth of 20.8 km. It was felt by 566 people with maximum shaking intensity of MMI 7.0 (severe). For context, this was a strong earthquake capable of causing significant damage.
Where did the earthquake occur?
The earthquake epicenter was located at -31.8334°, -68.7992°, which is 26 km SW of Pocito, Argentina. The nearest populated place is Pocito (population 40,969).
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 6.4 earthquakes can continue for weeks to months and gradually diminish over time.
Authoritative source: USGS event page (event ID: us7000d18q). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, January 19, 2021). M6.4 Earthquake 26 km SW of Pocito, Argentina — January 19, 2021. Retrieved August 5, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000d18q/