QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

Earthquake near Ponce, PR

No earthquake was likely felt in Ponce in the 24 hours to 1:35 pm AST (17:35 UTC). The last one was M 3.0, 26 km (16 mi) WSW, at 3:45 am AST on 8 November 2026, estimated intensity II (weak) in town. Every earthquake near Ponce

This page: a magnitude 1.7 earthquake was recorded 4 km (2 mi) east-southeast of Ponce, PR, at 11:41 am AST on 24 April 2018 (15:41 UTC), 19 km deep.

USGS: 3 km ESE of Ponce, Puerto Rico

in Ponce, PR

11:41 am AST, Apr 24, 2018 · · 19 km deep · released about 9.6 lb of TNT

Every earthquake near Ponce Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Ponce Municipio 2 kmJuana Díaz Municipio 10 kmPeñuelas Municipio 15 kmVillalba Municipio 19 kmSanta Isabel Municipio 22 kmGuayanilla Municipio 22 kmJayuya Municipio 23 kmAdjuntas Municipio 27 kmCoamo Municipio 27 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
11:41 am AST on 24 April 2018 ()
Where
4 km (2 mi) east-southeast of Ponce, PR · earthquakes near Ponce
Magnitude
M 1.7 (md)
Depth
19 km below the surface
Felt
no reports yet
Nearest
Ponce Municipio, 2 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3123 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 Ponce, 4 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: Capitanejo, Aguilita, Coto Laurel, Luis Llorens Torres, Potala Pastillo, Juana Díaz.

How big was it?

This earthquake released about 9.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 99× the energy of this one
  4. This earthquake M 1.7 about 9.6 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 18.0030, -66.5890. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Ponce Municipio, PR 2 km (1 mi) W earthquakes near Ponce Municipio
Juana Díaz Municipio, PR 10 km (6 mi) E earthquakes near Juana Díaz Municipio
Peñuelas Municipio, PR 15 km (9 mi) W earthquakes near Peñuelas Municipio
Villalba Municipio, PR 19 km (12 mi) NE earthquakes near Villalba Municipio
Santa Isabel Municipio, PR 22 km (14 mi) ESE earthquakes near Santa Isabel Municipio
Guayanilla Municipio, PR 22 km (14 mi) W earthquakes near Guayanilla Municipio

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

Aftershocks so far

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

  1. 1.6 3 km E of Tallaboa, Puerto Rico
  2. 1.6 4 km SW of Capitanejo, Puerto Rico
  3. 2.2 4 km WSW of Capitanejo, Puerto Rico
  4. 2.5 3 km SW of Capitanejo, Puerto Rico
  5. 2.0 20 km S of Guánica, Puerto Rico
  6. 2.0 1 km E of Parcelas Nuevas, Puerto Rico
  7. 2.2 3 km NNW of Orocovis, Puerto Rico
  8. 1.7 1 km ESE of Guayabal, Puerto Rico
  9. 1.7 1 km NW of Lluveras, Puerto Rico
  10. 1.8 5 km SSW of Salinas, Puerto Rico
  11. 1.7 5 km WSW of Liborio Negron Torres, Puerto Rico
  12. 1.6 8 km SSW of Guánica, Puerto Rico
  13. 2.0 6 km ESE of Maricao, Puerto Rico
  14. 2.1 2 km NE of Lluveras, Puerto Rico
  15. 1.6 4 km WNW of Fuig, 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.