QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

Earthquake near Mayagüez, PR

No earthquake was likely felt in Mayagüez in the 24 hours to 9:57 pm AST (01:57 UTC). The last one was M 2.9, 25 km (15 mi) SSE, at 3:17 am AST on 8 November 2026, estimated intensity II (weak) in town. Every earthquake near Mayagüez

This page: a magnitude 2.5 earthquake was recorded 6 km (4 mi) east of Mayagüez, PR, at 5:29 am AST on 21 October 2022 (09:29 UTC), 21 km deep.

USGS: 5 km E of Mayagüez, Puerto Rico

6 km (4 mi) E of Mayagüez, PR · 110 km (68 mi) W of San Juan, PR

5:29 am AST, Oct 21, 2022 · · 21 km deep · released about 170 lb of TNT

Every earthquake near Mayagüez Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Hormigueros Municipio 9 kmAñasco Municipio 10 kmLas Marías Municipio 12 kmSan Germán Municipio 13 kmMaricao Municipio 16 kmSan Sebastián Municipio 18 kmMoca Municipio 19 kmSabana Grande Municipio 20 kmAguada Municipio 21 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
5:29 am AST on 21 October 2022 ()
Where
6 km (4 mi) east of Mayagüez, PR · earthquakes near Mayagüez
Magnitude
M 2.5 (md)
Depth
21 km below the surface
Felt
no reports yet
Nearest
Hormigueros Municipio, 9 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1483 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, people at rest would likely notice it out to about 7 km (4 mi) from the epicentre. In Mayagüez, 6 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.

Likely felt in: Mayagüez 6 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 170 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 89,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 63,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.6× the energy of this one
  4. This earthquake M 2.5 about 170 lb of TNT

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 6.4 on 2020-01-07 — about 710,000 times the energy of this one.

Before 2016, the USGS record lists 6 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.3 6 km WNW of Aguadilla, Puerto Rico · 29 km NNW of this epicentre
  2. 6.1 15 km WNW of San Antonio, Puerto Rico · 41 km NNW of this epicentre
  3. 6.1 18 km NNW of San Antonio, Puerto Rico · 48 km NNW of this epicentre
  4. 5.8 4 km E of Moca, Puerto Rico · 21 km N of this epicentre
  5. 5.2 19 km SW of Stella, Puerto Rico · 30 km W 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 18.2105, -67.0855. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Hormigueros Municipio, PR 9 km (6 mi) SSW earthquakes near Hormigueros Municipio
Añasco Municipio, PR 10 km (6 mi) NNW earthquakes near Añasco Municipio
Las Marías Municipio, PR 12 km (7 mi) E earthquakes near Las Marías Municipio
San Germán Municipio, PR 13 km (8 mi) SSE earthquakes near San Germán Municipio
Maricao Municipio, PR 16 km (10 mi) ESE earthquakes near Maricao Municipio
San Sebastián Municipio, PR 18 km (11 mi) NE earthquakes near San Sebastián Municipio

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

Aftershocks so far

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

  1. 1.8 2 km WSW of Palomas, Puerto Rico
  2. 2.3 1 km NNE of Maria Antonia, Puerto Rico
  3. 2.4 3 km NW of Guayanilla, Puerto Rico
  4. 2.4 3 km ENE of Yauco, Puerto Rico
  5. 2.0 Puerto Rico region
  6. 2.1 2 km WSW of Indios, Puerto Rico
  7. 2.6 5 km W of Maricao, Puerto Rico
  8. 2.0 6 km E of La Parguera, Puerto Rico
  9. 1.8 4 km WSW of Guánica, Puerto Rico
  10. 2.3 4 km WSW of Guánica, Puerto Rico
  11. 1.7 6 km ESE of La Parguera, Puerto Rico
  12. 2.1 0 km S of Indios, Puerto Rico
  13. 1.9 5 km ESE of Pole Ojea, Puerto Rico
  14. 2.3 4 km WSW of La Parguera, Puerto Rico
  15. 2.7 2 km SSE of Guayanilla, 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.