QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6md

Earthquake near Sabana Grande, PR

Yes: an earthquake was likely felt in Sabana Grande in the last 24 hours. M 2.4, 16 km (10 mi) SSE of Sabana Grande, at 3:43 pm AST on 11 November 2026 (19:43 UTC); the estimated shaking in Sabana Grande was intensity II (weak). Every earthquake near Sabana Grande

This page: a magnitude 2.6 earthquake was recorded 5 km (3 mi) northwest of Sabana Grande, PR, at 5:47 am AST on 10 April 2023 (09:47 UTC), 15 km deep.

USGS: 5 km NW of Sabana Grande, Puerto Rico

41 km (26 mi) WNW of Ponce, PR · 18 km (11 mi) ESE of Mayagüez, PR

5:47 am AST, Apr 10, 2023 · · 15 km deep · released about 240 lb of TNT

Every earthquake near Sabana Grande Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Germán Municipio 5 kmSabana Grande Municipio 6 kmMaricao Municipio 9 kmLas Marías Municipio 13 kmHormigueros Municipio 13 kmYauco Municipio 15 kmLajas Municipio 16 kmGuánica Municipio 20 kmLares Municipio 23 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
5:47 am AST on 10 April 2023 ()
Where
5 km (3 mi) northwest of Sabana Grande, PR · earthquakes near Sabana Grande
Magnitude
M 2.6 (md)
Depth
15 km below the surface
Felt
no reports yet
Nearest
San Germán Municipio, 5 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1028 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 19 km (12 mi) from the epicentre. In Sabana Grande, 5 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.

Likely felt in: San Germán 6 km, intensity II · Yauco 18 km, intensity II · Mayagüez 18 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 240 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 63,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 45,000× the energy of this one
  3. Around the size people start to feel M 3.0 4× the energy of this one
  4. This earthquake M 2.6 about 240 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 500,000 times the energy of this one.

Before 2016, the USGS record lists 4 earthquakes of M5 or more within 50 km:

  1. 6.3 6 km WNW of Aguadilla, Puerto Rico · 43 km NNW of this epicentre
  2. 5.8 4 km E of Moca, Puerto Rico · 33 km NNW of this epicentre
  3. 5.2 19 km SW of Stella, Puerto Rico · 41 km WNW of this epicentre
  4. 5.1 21 km SW of Stella, Puerto Rico · 40 km W of this epicentre

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 18.1127, -66.9943. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
San Germán Municipio, PR 5 km (3 mi) W earthquakes near San Germán Municipio
Sabana Grande Municipio, PR 6 km (4 mi) ESE earthquakes near Sabana Grande Municipio
Maricao Municipio, PR 9 km (6 mi) NE earthquakes near Maricao Municipio
Las Marías Municipio, PR 13 km (8 mi) N earthquakes near Las Marías Municipio
Hormigueros Municipio, PR 13 km (8 mi) W earthquakes near Hormigueros Municipio
Yauco Municipio, PR 15 km (9 mi) ESE earthquakes near Yauco Municipio

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

Aftershocks so far

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

  1. 2.7 3 km SW of Indios, Puerto Rico
  2. 2.3 Puerto Rico region
  3. 2.2 4 km WSW of Fuig, Puerto Rico
  4. 2.3 Puerto Rico region
  5. 2.5 4 km WSW of Guánica, Puerto Rico
  6. 2.4 4 km WSW of Fuig, Puerto Rico
  7. 2.3 4 km WSW of Guánica, Puerto Rico
  8. 2.5 6 km WSW of Guánica, Puerto Rico
  9. 2.3 Puerto Rico region
  10. 2.2 8 km SW of Guánica, Puerto Rico
  11. 2.4 5 km WSW of Guánica, Puerto Rico
  12. 2.2 Puerto Rico region
  13. 2.0 6 km SE of Maria Antonia, Puerto Rico
  14. 2.2 5 km WSW of Fuig, Puerto Rico
  15. 2.3 6 km SE of Boquerón, 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.