QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4md

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 2.4 earthquake was recorded 18 km (11 mi) south-southeast of Maria Antonia, PR, at 10:29 am AST on 16 April 2018 (14:29 UTC), 9.0 km deep.

USGS: 18 km SSE of Maria Antonia, Puerto Rico

29 km (18 mi) SW of Ponce, PR

10:29 am AST, Apr 16, 2018 · · 9.0 km deep · released about 120 lb of TNT

Every earthquake near Maria Antonia Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guánica Municipio 17 kmGuayanilla Municipio 20 kmPeñuelas Municipio 25 kmLajas Municipio 28 kmYauco Municipio 29 kmPonce Municipio 31 kmSabana Grande Municipio 32 kmSan Germán Municipio 39 kmAdjuntas Municipio 40 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
10:29 am AST on 16 April 2018 ()
Where
18 km (11 mi) south-southeast of Maria Antonia, PR · earthquakes near Maria Antonia
Magnitude
M 2.4 (md)
Depth
9.0 km below the surface
Felt
no reports yet
Nearest
Guánica Municipio, 17 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3040 days ago

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

At this magnitude and depth, people at rest would likely notice it out to about 19 km (12 mi) from the epicentre. In Maria Antonia, 18 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, Tallaboa.

How big was it?

This earthquake released about 120 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 130,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 89,000× the energy of this one
  3. Around the size people start to feel M 3.0 7.9× the energy of this one
  4. This earthquake M 2.4 about 120 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 17.8240, -66.8265. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Guánica Municipio, PR 17 km (11 mi) NW earthquakes near Guánica Municipio
Guayanilla Municipio, PR 20 km (13 mi) N earthquakes near Guayanilla Municipio
Peñuelas Municipio, PR 25 km (15 mi) NNE earthquakes near Peñuelas Municipio
Lajas Municipio, PR 28 km (18 mi) NW earthquakes near Lajas Municipio
Yauco Municipio, PR 29 km (18 mi) N earthquakes near Yauco Municipio
Ponce Municipio, PR 31 km (19 mi) NE earthquakes near Ponce Municipio

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

Aftershocks so far

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

  1. 1.9 3 km NNE of Río Cañas Abajo, Puerto Rico
  2. 1.6 2 km W of Potala Pastillo, Puerto Rico
  3. 1.8 2 km E of Aguilita, Puerto Rico
  4. 2.1 14 km SW of Pole Ojea, Puerto Rico
  5. 2.2 18 km S of La Parguera, Puerto Rico
  6. 1.5 25 km S of Guánica, Puerto Rico
  7. 2.5 12 km SW of Pole Ojea, Puerto Rico
  8. 2.6 11 km WSW of Pole Ojea, Puerto Rico
  9. 2.0 6 km SSW of Guánica, Puerto Rico
  10. 1.9 7 km S of La Parguera, Puerto Rico
  11. 1.7 4 km W of La Parguera, Puerto Rico
  12. 1.7 8 km ESE of Maricao, Puerto Rico
  13. 1.8 13 km SSE of Tallaboa, Puerto Rico
  14. 2.2 17 km SSE of La Parguera, Puerto Rico
  15. 2.1 22 km SSE 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.