QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

Earthquake near Hormigueros, PR

No earthquake was likely felt in Hormigueros in the 24 hours to 9:46 am AST (13:46 UTC). The last one was M 2.1, 15 km (9 mi) S, at 11:57 pm AST on 8 November 2026, estimated intensity II (weak) in town. Every earthquake near Hormigueros

This page: a magnitude 3.0 earthquake was recorded 4 km (3 mi) northwest of Hormigueros, PR, at 3:01 pm AST on 23 October 2022 (19:01 UTC), 25 km deep.

USGS: 4 km NW of Hormigueros, Puerto Rico

in Mayagüez, PR · 118 km (74 mi) WSW of San Juan, PR

3:01 pm AST, Oct 23, 2022 · · 25 km deep · released about 920 lb of TNT

Every earthquake near Hormigueros Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Hormigueros Municipio 5 kmAñasco Municipio 14 kmSan Germán Municipio 14 kmCabo Rojo Municipio 19 kmLas Marías Municipio 20 kmRincón Municipio 22 kmMaricao Municipio 23 kmAguada Municipio 24 kmSabana Grande 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
3:01 pm AST on 23 October 2022 ()
Where
4 km (3 mi) northwest of Hormigueros, PR · earthquakes near Hormigueros
Magnitude
M 3.0 (md)
Depth
25 km below the surface
Felt
no reports yet
Nearest
Hormigueros Municipio, 5 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1408 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 26 km (16 mi) from the epicentre. In Hormigueros, 4 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 4 km, intensity II · Puerto Real 10 km, intensity II · San Germán 15 km, intensity II · Pole Ojea 21 km, intensity II · Rincón 22 km, intensity II · Aguada 24 km, intensity II · San Sebastián 26 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 920 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 370,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 16,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 12,000× the energy of this one
  4. This earthquake M 3.0 about 920 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 130,000 times the energy of this one.

Before 2016, the USGS record lists 5 earthquakes of M5 or more within 50 km:

  1. 6.3 6 km WNW of Aguadilla, Puerto Rico · 31 km N of this epicentre
  2. 6.1 15 km WNW of San Antonio, Puerto Rico · 44 km N of this epicentre
  3. 5.8 4 km E of Moca, Puerto Rico · 28 km NNE of this epicentre
  4. 5.2 19 km SW of Stella, Puerto Rico · 23 km W of this epicentre
  5. 5.1 21 km SW of Stella, Puerto Rico · 23 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 18.1647, -67.1570. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Hormigueros Municipio, PR 5 km (3 mi) SE earthquakes near Hormigueros Municipio
Añasco Municipio, PR 14 km (9 mi) NNE earthquakes near Añasco Municipio
San Germán Municipio, PR 14 km (9 mi) ESE earthquakes near San Germán Municipio
Cabo Rojo Municipio, PR 19 km (12 mi) S earthquakes near Cabo Rojo Municipio
Las Marías Municipio, PR 20 km (13 mi) ENE earthquakes near Las Marías Municipio
Rincón Municipio, PR 22 km (14 mi) NNW earthquakes near Rincón Municipio

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

Aftershocks so far

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

  1. 2.5 1 km WNW of Indios, Puerto Rico
  2. 2.3 Puerto Rico region
  3. 2.5 Puerto Rico region
  4. 2.2 1 km E of Magas Arriba, Puerto Rico
  5. 2.0 3 km NW of La Parguera, Puerto Rico
  6. 2.4 7 km SSW of Indios, Puerto Rico
  7. 1.6 1 km NNE of La Parguera, Puerto Rico
  8. 2.1 1 km WNW of Indios, Puerto Rico
  9. 2.1 3 km WSW of Guánica, Puerto Rico
  10. 2.0 1 km ENE of Indios, Puerto Rico
  11. 2.4 1 km NE of Indios, Puerto Rico
  12. 1.9 2 km S of Gu?nica, Puerto Rico
  13. 2.4 3 km WSW of Indios, Puerto Rico
  14. 2.4 2 km NW of Fuig, Puerto Rico
  15. 2.0 4 km S of Indios, 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.