QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

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 2.1 earthquake was recorded 17 km (10 mi) south-southeast of Maria Antonia, PR, at 9:40 pm AST on 23 December 2018 (01:40 UTC), 20 km deep.

USGS: 16 km SSE of Maria Antonia, Puerto Rico

29 km (18 mi) SW of Ponce, PR

9:40 pm AST, Dec 23, 2018 · · 20 km deep · released about 51 lb of TNT

Every earthquake near Maria Antonia Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guánica Municipio 15 kmGuayanilla Municipio 20 kmPeñuelas Municipio 24 kmLajas Municipio 26 kmYauco Municipio 28 kmSabana Grande Municipio 30 kmPonce Municipio 31 kmSan Germán Municipio 37 kmMaricao Municipio 39 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
9:40 pm AST on 23 December 2018 ()
Where
17 km (10 mi) south-southeast of Maria Antonia, PR · earthquakes near Maria Antonia
Magnitude
M 2.1 (md)
Depth
20 km below the surface
Felt
no reports yet
Nearest
Guánica Municipio, 15 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2880 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. In Maria Antonia, 17 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.

Earthquakes near other towns within 30 km: Guánica, Indios, Fuig, Palomas, Guayanilla, Magas Arriba.

How big was it?

This earthquake released about 51 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 210,000× the energy of this one
  3. Around the size people start to feel M 3.0 19× the energy of this one
  4. This earthquake M 2.1 about 51 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

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

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 17.8343, -66.8410. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Guánica Municipio, PR 15 km (10 mi) NW earthquakes near Guánica Municipio
Guayanilla Municipio, PR 20 km (12 mi) NNE earthquakes near Guayanilla Municipio
Peñuelas Municipio, PR 24 km (15 mi) NNE earthquakes near Peñuelas Municipio
Lajas Municipio, PR 26 km (16 mi) NW earthquakes near Lajas Municipio
Yauco Municipio, PR 28 km (17 mi) N earthquakes near Yauco Municipio
Sabana Grande Municipio, PR 30 km (19 mi) NNW earthquakes near Sabana Grande Municipio

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

Aftershocks so far

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

  1. 1.6 1 km SSE of Capitanejo, Puerto Rico
  2. 1.6 0 km N of San Germán, Puerto Rico
  3. 1.7 1 km W of Puerto Real, Puerto Rico
  4. 1.8 17 km SSE of Indios, Puerto Rico
  5. 1.6 5 km W of Jayuya, Puerto Rico
  6. 2.0 6 km S of Tallaboa, Puerto Rico
  7. 1.8 7 km SW of Guánica, Puerto Rico
  8. 1.6 10 km S of Guánica, Puerto Rico
  9. 2.0 3 km SW of Sabana Grande, Puerto Rico
  10. 1.9 1 km W of Las Ollas, Puerto Rico
  11. 1.8 13 km SSW of Guánica, Puerto Rico
  12. 1.9 7 km WSW of Adjuntas, Puerto Rico
  13. 2.2 5 km WSW of Liborio Negron Torres, Puerto Rico
  14. 2.1 13 km SSW of Guánica, Puerto Rico
  15. 1.7 5 km N of Yauco, 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.