QuakeIndex

Earthquake · reviewed by a seismologist

M 2.0md

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 2.0 earthquake was recorded 3 km (2 mi) north-northwest of Sabana Grande, PR, at 10:41 pm AST on 28 July 2017 (02:41 UTC), 23 km deep.

USGS: 3 km NW of Sabana Grande, Puerto Rico

39 km (24 mi) WNW of Ponce, PR · 20 km (13 mi) ESE of Mayagüez, PR

10:41 pm AST, Jul 28, 2017 · · 23 km deep · released about 27 lb of TNT

Every earthquake near Sabana Grande Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sabana Grande Municipio 4 kmSan Germán Municipio 6 kmMaricao Municipio 9 kmYauco Municipio 13 kmLas Marías Municipio 14 kmHormigueros Municipio 15 kmLajas Municipio 15 kmGuánica Municipio 18 kmGuayanilla Municipio 22 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
10:41 pm AST on 28 July 2017 ()
Where
3 km (2 mi) north-northwest of Sabana Grande, PR · earthquakes near Sabana Grande
Magnitude
M 2.0 (md)
Depth
23 km below the surface
Felt
no reports yet
Nearest
Sabana Grande Municipio, 4 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3393 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 Sabana Grande, 3 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: San Germán, Liborio Negron Torres, Maricao, Lajas, Lluveras, Sabana Eneas.

How big was it?

This earthquake released about 27 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 560,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 390,000× the energy of this one
  3. Around the size people start to feel M 3.0 35× the energy of this one
  4. This earthquake M 2.0 about 27 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 lists 4 earthquakes of M5 or more within 50 km:

  1. 6.3 6 km WNW of Aguadilla, Puerto Rico · 45 km NNW of this epicentre
  2. 5.8 4 km E of Moca, Puerto Rico · 34 km NNW of this epicentre
  3. 5.2 19 km SW of Stella, Puerto Rico · 42 km WNW of this epicentre
  4. 5.1 21 km SW of Stella, Puerto Rico · 42 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 18.1030, -66.9781. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Sabana Grande Municipio, PR 4 km (2 mi) ESE earthquakes near Sabana Grande Municipio
San Germán Municipio, PR 6 km (4 mi) W earthquakes near San Germán Municipio
Maricao Municipio, PR 9 km (6 mi) NNE earthquakes near Maricao Municipio
Yauco Municipio, PR 13 km (8 mi) E earthquakes near Yauco Municipio
Las Marías Municipio, PR 14 km (9 mi) N earthquakes near Las Marías Municipio
Hormigueros Municipio, PR 15 km (9 mi) WNW earthquakes near Hormigueros Municipio

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

Aftershocks so far

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

  1. 2.0 2 km ESE of La Playa, Puerto Rico
  2. 2.5 2 km N of Tallaboa, Puerto Rico
  3. 2.2 11 km WNW of Puerto Real, Puerto Rico
  4. 2.1 4 km SW of Las Marías, Puerto Rico
  5. 2.6 4 km ENE of Mayagüez, Puerto Rico
  6. 2.1 9 km W of Puerto Real, Puerto Rico
  7. 2.4 7 km W of Mayagüez, Puerto Rico
  8. 2.1 2 km SW of Liborio Negron Torres, Puerto Rico
  9. 2.1 4 km NNW of Las Marías, Puerto Rico
  10. 2.3 1 km NW of Maria Antonia, Puerto Rico
  11. 2.2 4 km W of Las Marías, Puerto Rico
  12. 1.7 1 km SSW of Liborio Negron Torres, Puerto Rico
  13. 2.5 2 km SSW of Palmarejo, Puerto Rico
  14. 2.0 3 km WNW of Puerto Real, Puerto Rico
  15. 2.1 5 km SSW of Maricao, 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.