M7.5 Earthquake 43 km NNW of Barranca, Peru — November 28, 2021
2021-11-28 10:52:14 UTC (2021-11-28) · approx. 5:52 AM UTC-5 local
Felt by 276 people across surrounding communities. Maximum shaking intensity MMI 7.6 (severe).
On November 28, 2021 at 10:52 UTC, a magnitude 7.5 intermediate depth earthquake struck 43 km NNW of Barranca, Peru, at a depth of 126.0 km and coordinates -4.4667°, -76.8126°. The earthquake was reported felt by 276 peopleacross surrounding communities, with a maximum shaking intensity of Modified Mercalli Intensity (MMI) 7.6 (severe). The USGS PAGER system issued a yellow alert level for this event, indicating local impact possible. The nearest populated place is San Lorenzo (population 0).
Physical scale: An earthquake of magnitude 7.5 releases seismic energy equivalent to roughly 2.7 megatons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 90 km — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Peru, a region characterized by the northern Peru-Chile subduction zone, complicated by the subduction of the Nazca Ridge. The nearest mapped fault system is the Peru-Chile Trench. View all earthquakes in Peru.
Learn more: Magnitude scale · Aftershock sequences
Nearest Populated Places
What the Shaking Felt Like
At MMI 7.6 (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 276 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 | 6,157,330 |
| MMI 4 | light | 21,418,139 |
| MMI 5 | moderate | 3,191,746 |
| MMI 6 | strong | 1,032,940 |
| MMI 7 | very strong | 238,643 |
| MMI 8 | severe | 17,353 |
Earthquake Details
-76.8126°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 7.5 earthquake near Barranca, Peru?
The magnitude 7.5 earthquake that struck 43 km NNW of Barranca, Peru on November 28, 2021 at 10:52 UTC had a depth of 126.0 km. It was felt by 276 people with maximum shaking intensity of MMI 7.6 (severe). For context, this was a strong earthquake capable of causing significant damage.
Where did the earthquake occur?
The earthquake epicenter was located at -4.4667°, -76.8126°, which is 43 km NNW of Barranca, Peru. The nearest populated place is San Lorenzo (population 0). View all earthquakes in Peru.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 7.5 earthquakes can continue for months to years and gradually diminish over time.
Has Peru had earthquakes this big before?
The largest recorded earthquake in Peru was the M8.0 Arequipa earthquake of June 23, 2001. Today's magnitude 7.5 event is within one magnitude unit of that historical record.
Actions
Location
Authoritative source: USGS event page (event ID: us7000fxq2). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, November 28, 2021). M7.5 Earthquake 43 km NNW of Barranca, Peru — November 28, 2021. Retrieved December 22, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000fxq2/