QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4md

Earthquake near Ponce, PR

No earthquake was likely felt in Ponce in the 24 hours to 5:53 pm AST (21:53 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 2.4 earthquake was recorded 27 km (17 mi) south of Ponce, PR, at 7:18 am AST on 21 June 2017 (11:18 UTC), 17 km deep.

USGS: 26 km S of Ponce, Puerto Rico

26 km (16 mi) S of Ponce, PR

7:18 am AST, Jun 21, 2017 · · 17 km deep · released about 110 lb of TNT

Every earthquake near Ponce Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Ponce Municipio 26 kmJuana Díaz Municipio 29 kmPeñuelas Municipio 31 kmSanta Isabel Municipio 31 kmGuayanilla Municipio 33 kmGuánica Municipio 38 kmVillalba Municipio 43 kmSalinas Municipio 43 kmYauco Municipio 44 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
7:18 am AST on 21 June 2017 ()
Where
27 km (17 mi) south of Ponce, PR · earthquakes near Ponce
Magnitude
M 2.4 (md)
Depth
17 km below the surface
Felt
no reports yet
Nearest
Ponce Municipio, 26 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3429 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 12 km (7 mi) from the epicentre. In Ponce, 27 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: Tallaboa, Potala Pastillo, Capitanejo, Aguilita.

How big was it?

This earthquake released about 110 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 5.8 140,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 99,000× the energy of this one
  3. Around the size people start to feel M 3.0 8.8× the energy of this one
  4. This earthquake M 2.4 about 110 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 17.7683, -66.6125. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Ponce Municipio, PR 26 km (16 mi) N earthquakes near Ponce Municipio
Juana Díaz Municipio, PR 29 km (18 mi) NNE earthquakes near Juana Díaz Municipio
Peñuelas Municipio, PR 31 km (19 mi) NNW earthquakes near Peñuelas Municipio
Santa Isabel Municipio, PR 31 km (20 mi) NE earthquakes near Santa Isabel Municipio
Guayanilla Municipio, PR 33 km (20 mi) NW earthquakes near Guayanilla Municipio
Guánica Municipio, PR 38 km (24 mi) WNW earthquakes near Guánica Municipio

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

Aftershocks so far

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

  1. 2.5 1 km ENE of Salinas, Puerto Rico
  2. 1.9 22 km S of Guánica, Puerto Rico
  3. 1.7 7 km N of Yauco, Puerto Rico
  4. 1.6 6 km NNE of Lluveras, Puerto Rico
  5. 1.8 8 km NNW of Yauco, Puerto Rico
  6. 1.8 7 km NNW of Yauco, Puerto Rico
  7. 1.8 6 km NNW of Yauco, Puerto Rico
  8. 2.1 16 km S of Ponce, Puerto Rico
  9. 2.0 7 km SSW of Tallaboa, Puerto Rico
  10. 2.7 2 km ESE of Magas Arriba, Puerto Rico
  11. 2.3 4 km WSW of Tallaboa, Puerto Rico
  12. 1.9 14 km SSW of Guánica, Puerto Rico
  13. 2.1 11 km S of Santa Isabel, Puerto Rico
  14. 2.6 13 km S of Santa Isabel, Puerto Rico
  15. 1.9 3 km SE of La Parguera, 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.