QuakeIndex

Earthquake · reviewed by a seismologist

M 3.5md

Earthquake near Animas, PR

No earthquake was likely felt in Animas in the 24 hours to 7:48 am AST (11:48 UTC). The last one was M 2.9, 11 km (7 mi) N, at 2:05 am AST on 13 October 2026, estimated intensity II (weak) in town. Every earthquake near Animas

This page: a magnitude 3.5 earthquake was recorded 3 km (2 mi) south of Animas, PR, at 6:00 pm AST on 11 August 2022 (22:00 UTC), 123 km deep. 1 person has reported feeling it to USGS.

USGS: 3 km S of Animas, Puerto Rico

11 km (7 mi) ESE of Arecibo, PR · 61 km (38 mi) W of San Juan, PR

6:00 pm AST, Aug 11, 2022 · · 123 km deep · released about 2.8 tons of TNT

Every earthquake near Animas Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Arecibo Municipio 4 kmFlorida Municipio 10 kmBarceloneta Municipio 10 kmManatí Municipio 16 kmHatillo Municipio 17 kmUtuado Municipio 17 kmCiales Municipio 19 kmJayuya Municipio 23 kmCamuy Municipio 24 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
6:00 pm AST on 11 August 2022 ()
Where
3 km (2 mi) south of Animas, PR · earthquakes near Animas
Magnitude
M 3.5 (md)
Depth
123 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Arecibo Municipio, 4 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1482 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. In Animas, 3 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

Earthquakes near other towns within 30 km: Sabana Hoyos, La Alianza, Bajadero, Bufalo, Garrochales, Estancias de Florida.

How big was it?

This earthquake released about 2.8 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.5 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 61,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,700× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,900× the energy of this one
  4. This earthquake M 3.5 about 2.8 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 5.8× more

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

For this area

The largest earthquake within 50 km since 2016 was M 5.6 on 2020-01-07 — about 1,400 times the energy of this one.

Before 2016, the USGS record lists 3 earthquakes of M5 or more within 50 km:

  1. 5.8 12 km N of Garrochales, Puerto Rico · 18 km NNE of this epicentre
  2. 5.8 4 km E of Moca, Puerto Rico · 45 km W of this epicentre
  3. 5.0 3 km N of Brenas, Puerto Rico · 33 km ENE of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 18.4163, -66.6401. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Arecibo Municipio, PR 4 km (3 mi) WNW earthquakes near Arecibo Municipio
Florida Municipio, PR 10 km (6 mi) ESE earthquakes near Florida Municipio
Barceloneta Municipio, PR 10 km (7 mi) NE earthquakes near Barceloneta Municipio
Manatí Municipio, PR 16 km (10 mi) ENE earthquakes near Manatí Municipio
Hatillo Municipio, PR 17 km (11 mi) W earthquakes near Hatillo Municipio
Utuado Municipio, PR 17 km (11 mi) SSW earthquakes near Utuado Municipio

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

8 earthquakes have been recorded within 50 km since this one.

  1. 2.9 22 km N of Arecibo, Puerto Rico
  2. 3.4 1 km SSW of Pájaros, Puerto Rico
  3. 2.1 0 km NW of Guayanilla, Puerto Rico
  4. 2.7 2 km E of Magas Arriba, Puerto Rico
  5. 2.7 2 km ENE of Magas Arriba, Puerto Rico
  6. 2.6 5 km ESE of Tallaboa, Puerto Rico
  7. 2.1 4 km ESE of Tallaboa Alta, Puerto Rico
  8. 2.0 2 km SW of Lares, Puerto Rico

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.