QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

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 3.1 earthquake was recorded 5 km (3 mi) southeast of Maria Antonia, PR, at 2:20 pm AST on 18 April 2020 (18:20 UTC), 11 km deep.

USGS: 4 km SE of Maria Antonia, Puerto Rico

25 km (15 mi) WSW of Ponce, PR

2:20 pm AST, Apr 18, 2020 · · 11 km deep · released about 1,300 lb of TNT

Every earthquake near Maria Antonia Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guánica Municipio 8 kmGuayanilla Municipio 8 kmYauco Municipio 15 kmPeñuelas Municipio 15 kmSabana Grande Municipio 18 kmLajas Municipio 20 kmMaricao Municipio 26 kmSan Germán Municipio 26 kmPonce 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
2:20 pm AST on 18 April 2020 ()
Where
5 km (3 mi) southeast of Maria Antonia, PR · earthquakes near Maria Antonia
Magnitude
M 3.1 (md)
Depth
11 km below the surface
Felt
no reports yet
Nearest
Guánica Municipio, 8 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2398 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 39 km (24 mi) from the epicentre. In Maria Antonia, 5 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 9 km, intensity III · Guayanilla 10 km, intensity III · Magas Arriba 11 km, intensity III · Tallaboa 15 km, intensity III · Tallaboa Alta 19 km, intensity II · Ponce 25 km, intensity II · San Germán 25 km, intensity II · Adjuntas 27 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 270,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 12,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 8,500× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.3× 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 6.4 on 2020-01-07 — about 95,000 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 17.9536, -66.8515. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Guánica Municipio, PR 8 km (5 mi) W earthquakes near Guánica Municipio
Guayanilla Municipio, PR 8 km (5 mi) NE earthquakes near Guayanilla Municipio
Yauco Municipio, PR 15 km (9 mi) N earthquakes near Yauco Municipio
Peñuelas Municipio, PR 15 km (10 mi) ENE earthquakes near Peñuelas Municipio
Sabana Grande Municipio, PR 18 km (11 mi) NW earthquakes near Sabana Grande Municipio
Lajas Municipio, PR 20 km (13 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. 2.5 7 km ESE of La Parguera, Puerto Rico
  2. 2.7 0 km WSW of Guánica, Puerto Rico
  3. 3.2 8 km SSW of Guánica, Puerto Rico
  4. 2.6 20 km S of Indios, Puerto Rico
  5. 3.0 6 km WNW of Las Marías, Puerto Rico
  6. 2.9 2 km NW of Indios, Puerto Rico
  7. 1.9 2 km S of Magas Arriba, Puerto Rico
  8. 3.1 2 km ENE of Maria Antonia, Puerto Rico
  9. 3.0 5 km SSW of Indios, Puerto Rico
  10. 2.6 2 km E of Maria Antonia, Puerto Rico
  11. 2.1 3 km SSE of Maria Antonia, Puerto Rico
  12. 2.0 9 km SSE of Indios, Puerto Rico
  13. 2.8 Puerto Rico region
  14. 1.9 6 km E of La Parguera, Puerto Rico
  15. 2.7 6 km SSE 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.