QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

Earthquake near Maria Antonia, PR

No earthquake was likely felt in Maria Antonia in the 24 hours to 8:31 am AST (12:31 UTC). The last one was M 2.1, 11 km (7 mi) ENE, at 4:39 pm AST on 9 November 2026, estimated intensity II (weak) in town. Every earthquake near Maria Antonia

This page: a magnitude 2.5 earthquake was recorded 3 km (2 mi) east-southeast of Maria Antonia, PR, at 9:04 pm AST on 6 July 2021 (01:04 UTC), 11 km deep. 1 person has reported feeling it to USGS.

USGS: 2 km ESE of Maria Antonia, Puerto Rico

26 km (16 mi) W of Ponce, PR

9:04 pm AST, Jul 6, 2021 · · 11 km deep · released about 190 lb of TNT

Every earthquake near Maria Antonia Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guánica Municipio 6 kmGuayanilla Municipio 8 kmYauco Municipio 13 kmSabana Grande Municipio 16 kmPeñuelas Municipio 16 kmLajas Municipio 18 kmSan Germán Municipio 24 kmMaricao Municipio 24 kmAdjuntas Municipio 26 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
9:04 pm AST on 6 July 2021 ()
Where
3 km (2 mi) east-southeast of Maria Antonia, PR · earthquakes near Maria Antonia
Magnitude
M 2.5 (md)
Depth
11 km below the surface
Felt
1 report · strongest reported intensity I
Nearest
Guánica Municipio, 6 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1953 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 20 km (12 mi) from the epicentre. In Maria Antonia, 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.

Likely felt in: Yauco 8 km, intensity II · Guayanilla 10 km, intensity II · Magas Arriba 12 km, intensity II · Tallaboa 16 km, intensity II · Tallaboa Alta 20 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 190 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 78,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 55,000× the energy of this one
  3. Around the size people start to feel M 3.0 4.9× the energy of this one
  4. This earthquake M 2.5 about 190 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 620,000 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 17.9676, -66.8668. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Guánica Municipio, PR 6 km (4 mi) WSW earthquakes near Guánica Municipio
Guayanilla Municipio, PR 8 km (5 mi) ENE earthquakes near Guayanilla Municipio
Yauco Municipio, PR 13 km (8 mi) N earthquakes near Yauco Municipio
Sabana Grande Municipio, PR 16 km (10 mi) NNW earthquakes near Sabana Grande Municipio
Peñuelas Municipio, PR 16 km (10 mi) ENE earthquakes near Peñuelas Municipio
Lajas Municipio, PR 18 km (11 mi) W earthquakes near Lajas Municipio

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

Aftershocks so far

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

  1. 2.3 7 km WSW of La Parguera, Puerto Rico
  2. 2.7 5 km WSW of La Parguera, Puerto Rico
  3. 4.5 6 km WSW of La Parguera, Puerto Rico
  4. 3.1 7 km WSW of La Parguera, Puerto Rico
  5. 3.1 4 km N of Guayanilla, Puerto Rico
  6. 2.5 5 km WSW of Guánica, Puerto Rico
  7. 2.9 5 km SSW of Guánica, Puerto Rico
  8. 2.2 2 km SSW of Capitanejo, Puerto Rico
  9. 3.1 8 km W of Mayagüez, Puerto Rico
  10. 2.7 5 km SE of Maria Antonia, Puerto Rico
  11. 2.1 2 km ESE of Palomas, Puerto Rico
  12. 2.1 4 km ESE of La Parguera, Puerto Rico
  13. 2.1 4 km SW of La Parguera, Puerto Rico
  14. 3.2 3 km NNW of La Parguera, Puerto Rico
  15. 1.8 1 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.