QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

Earthquake near Guayanilla, PR

No earthquake was likely felt in Guayanilla in the 24 hours to 12:52 pm AST (16:52 UTC). The last one was M 2.1, in Guayanilla, at 4:39 pm AST on 9 November 2026, estimated intensity II (weak) in town. Every earthquake near Guayanilla

This page: a magnitude 1.7 earthquake was recorded in Guayanilla, PR, at 3:43 am AST on 24 March 2026 (07:43 UTC), 16 km deep.

USGS: 1 km N of Guayanilla, Puerto Rico

18 km (11 mi) W of Ponce, PR

3:43 am AST, Mar 24, 2026 · · 16 km deep · released about 12 lb of TNT

Every earthquake near Guayanilla Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guayanilla Municipio 3 kmPeñuelas Municipio 7 kmYauco Municipio 9 kmGuánica Municipio 17 kmAdjuntas Municipio 17 kmSabana Grande Municipio 18 kmPonce Municipio 20 kmMaricao Municipio 22 kmLajas 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
3:43 am AST on 24 March 2026 ()
Where
in Guayanilla, PR · earthquakes near Guayanilla
Magnitude
M 1.7 (md)
Depth
16 km below the surface
Felt
no reports yet
Nearest
Guayanilla Municipio, 3 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 232 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. 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: Magas Arriba, Indios, Santo Domingo, Yauco, Peñuelas, Tallaboa.

How big was it?

This earthquake released about 12 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 1,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 900,000× the energy of this one
  3. Around the size people start to feel M 3.0 80× the energy of this one
  4. This earthquake M 1.7 about 12 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

The largest earthquake within 50 km since 2016 was M 6.4 on 2020-01-07 — about 10,000,000 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 18.0303, -66.7913. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Guayanilla Municipio, PR 3 km (2 mi) SSW earthquakes near Guayanilla Municipio
Peñuelas Municipio, PR 7 km (4 mi) E earthquakes near Peñuelas Municipio
Yauco Municipio, PR 9 km (6 mi) NW earthquakes near Yauco Municipio
Guánica Municipio, PR 17 km (10 mi) WSW earthquakes near Guánica Municipio
Adjuntas Municipio, PR 17 km (11 mi) NNE earthquakes near Adjuntas Municipio
Sabana Grande Municipio, PR 18 km (11 mi) WNW earthquakes near Sabana Grande Municipio

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

Aftershocks so far

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

  1. 2.0 1 km WSW of Indios, Puerto Rico
  2. 2.1 17 km SSE of Guánica, Puerto Rico
  3. 2.0 1 km W of Indios, Puerto Rico
  4. 2.8 5 km SE of Maria Antonia, Puerto Rico
  5. 2.5 3 km ENE of Ponce, Puerto Rico
  6. 2.6 20 km S of Indios, Puerto Rico
  7. 2.1 1 km W of Santo Domingo, Puerto Rico
  8. 2.4 15 km SSE of Guánica, Puerto Rico
  9. 2.3 2 km NW of Mayagüez, Puerto Rico
  10. 2.1 3 km SSW of Guánica, Puerto Rico
  11. 2.2 5 km E of Pole Ojea, Puerto Rico
  12. 1.6 3 km NNW of Yauco, Puerto Rico
  13. 1.9 4 km SW of Indios, Puerto Rico
  14. 2.2 16 km S of Guánica, Puerto Rico
  15. 2.3 3 km ESE 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.