QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

Earthquake near Sabana Grande, PR

No earthquake was likely felt in Sabana Grande in the 24 hours to 1:54 pm AST (17:54 UTC). The last one was M 3.0, 22 km (13 mi) SSE, at 3:45 am AST on 8 November 2026, estimated intensity II (weak) in town. Every earthquake near Sabana Grande

This page: a magnitude 2.1 earthquake was recorded 10 km (6 mi) northeast of Sabana Grande, PR, at 9:31 pm AST on 18 June 2024 (01:31 UTC), 16 km deep.

USGS: 9 km NE of Sabana Grande, Puerto Rico

31 km (19 mi) WNW of Ponce, PR · 28 km (18 mi) ESE of Mayagüez, PR

9:31 pm AST, Jun 18, 2024 · · 16 km deep · released about 46 lb of TNT

Every earthquake near Sabana Grande Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Yauco Municipio 5 kmMaricao Municipio 7 kmSabana Grande Municipio 8 kmAdjuntas Municipio 15 kmLas Marías Municipio 15 kmSan Germán Municipio 16 kmGuayanilla Municipio 16 kmLares Municipio 17 kmPeñuelas Municipio 20 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
9:31 pm AST on 18 June 2024 ()
Where
10 km (6 mi) northeast of Sabana Grande, PR · earthquakes near Sabana Grande
Magnitude
M 2.1 (md)
Depth
16 km below the surface
Felt
no reports yet
Nearest
Yauco Municipio, 5 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 876 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 6 km (4 mi) from the epicentre. In Sabana Grande, 10 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: Lluveras, Yauco, Liborio Negron Torres, Maricao, Palomas, Guayanilla.

How big was it?

This earthquake released about 46 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 330,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 21× the energy of this one
  4. This earthquake M 2.1 about 46 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 2,600,000 times the energy of this one.

Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:

  1. 6.3 6 km WNW of Aguadilla, Puerto Rico · 49 km NW of this epicentre
  2. 5.8 4 km E of Moca, Puerto Rico · 36 km NNW 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 18.1273, -66.8855. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Yauco Municipio, PR 5 km (3 mi) SSE earthquakes near Yauco Municipio
Maricao Municipio, PR 7 km (5 mi) NW earthquakes near Maricao Municipio
Sabana Grande Municipio, PR 8 km (5 mi) SW earthquakes near Sabana Grande Municipio
Adjuntas Municipio, PR 15 km (9 mi) ENE earthquakes near Adjuntas Municipio
Las Marías Municipio, PR 15 km (9 mi) NW earthquakes near Las Marías Municipio
San Germán Municipio, PR 16 km (10 mi) W earthquakes near San Germán 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. 2.7 9 km SW of La Parguera, Puerto Rico
  2. 2.3 3 km SSW of Tallaboa, Puerto Rico
  3. 2.3 5 km ESE of Lajas, Puerto Rico
  4. 3.0 5 km WSW of Guánica, Puerto Rico
  5. 2.5 5 km S of Magas Arriba, Puerto Rico
  6. 2.7 15 km SSE of Guánica, Puerto Rico
  7. 2.2 9 km SSE of Indios, Puerto Rico
  8. 2.4 1 km ESE of La Parguera, Puerto Rico
  9. 2.1 7 km SW of Guánica, Puerto Rico
  10. 3.0 7 km ESE of La Parguera, Puerto Rico
  11. 2.8 5 km ENE of Maricao, Puerto Rico
  12. 2.8 7 km S of Lares, Puerto Rico
  13. 3.2 3 km SW of Fuig, Puerto Rico
  14. 2.9 6 km SSE of Maria Antonia, Puerto Rico
  15. 2.4 7 km SSE 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.