QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

Earthquake near Maria Antonia, PR

Yes: an earthquake was likely felt in Maria Antonia in the last 24 hours. M 2.1, 5 km (3 mi) ENE of Maria Antonia, at 4:14 pm AST on 11 November 2026 (20:14 UTC); the estimated shaking in Maria Antonia was intensity II (weak). Every earthquake near Maria Antonia

This page: a magnitude 2.8 earthquake was recorded 3 km (2 mi) east of Maria Antonia, PR, at 2:22 am AST on 2 August 2023 (06:22 UTC), 12 km deep.

USGS: 3 km E of Maria Antonia, Puerto Rico

25 km (15 mi) W of Ponce, PR

2:22 am AST, Aug 2, 2023 · · 12 km deep · released about 420 lb of TNT

Every earthquake near Maria Antonia Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guayanilla Municipio 7 kmGuánica Municipio 8 kmYauco Municipio 12 kmPeñuelas Municipio 15 kmSabana Grande Municipio 15 kmLajas Municipio 19 kmMaricao Municipio 23 kmSan Germán Municipio 23 kmAdjuntas Municipio 25 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
2:22 am AST on 2 August 2023 ()
Where
3 km (2 mi) east of Maria Antonia, PR · earthquakes near Maria Antonia
Magnitude
M 2.8 (md)
Depth
12 km below the surface
Felt
no reports yet
Nearest
Guayanilla Municipio, 7 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1198 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 23 km (14 mi) from the epicentre. In Maria Antonia, 3 km away, the estimate is intensity III (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: Yauco 6 km, intensity III · Guayanilla 8 km, intensity III · Magas Arriba 10 km, intensity II · Tallaboa 15 km, intensity II · Tallaboa Alta 18 km, intensity II · San Germán 23 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 420 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 36,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 26,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.3× the energy of this one
  4. This earthquake M 2.8 about 420 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 290,000 times the energy of this one.

Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.

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 17.9822, -66.8588. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Guayanilla Municipio, PR 7 km (4 mi) ENE earthquakes near Guayanilla Municipio
Guánica Municipio, PR 8 km (5 mi) WSW earthquakes near Guánica Municipio
Yauco Municipio, PR 12 km (7 mi) N earthquakes near Yauco Municipio
Peñuelas Municipio, PR 15 km (9 mi) ENE earthquakes near Peñuelas Municipio
Sabana Grande Municipio, PR 15 km (9 mi) NW earthquakes near Sabana Grande Municipio
Lajas Municipio, PR 19 km (12 mi) W earthquakes near Lajas Municipio

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

Aftershocks so far

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

  1. 2.5 8 km S of Guánica, Puerto Rico
  2. 2.2 8 km WSW of Adjuntas, Puerto Rico
  3. 2.5 5 km WSW of La Parguera, Puerto Rico
  4. 2.5 6 km WSW of Guánica, Puerto Rico
  5. 3.1 4 km SSW of Puerto Real, Puerto Rico
  6. 2.0 0 km SSE of Palomas, Puerto Rico
  7. 2.3 5 km NNE of Lluveras, Puerto Rico
  8. 3.0 3 km WSW of La Parguera, Puerto Rico
  9. 2.7 Puerto Rico region
  10. 2.6 2 km WNW of Tallaboa, Puerto Rico
  11. 2.4 5 km SW of Guánica, Puerto Rico
  12. 2.3 6 km SE of Maria Antonia, Puerto Rico
  13. 3.4 6 km SW of Guánica, Puerto Rico
  14. 2.4 4 km SW of Indios, Puerto Rico
  15. 2.5 7 km SE of Maria Antonia, 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.