QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

Earthquake near Sabana Grande, PR

No earthquake was likely felt in Sabana Grande in the 24 hours to 3:33 pm AST (19:33 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 1.9 earthquake was recorded 2 km (1 mi) north-northwest of Sabana Grande, PR, at 6:55 pm AST on 13 August 2019 (22:55 UTC), 21 km deep.

USGS: Puerto Rico region

38 km (24 mi) WNW of Ponce, PR · 22 km (13 mi) ESE of Mayagüez, PR

6:55 pm AST, Aug 13, 2019 · · 21 km deep · released about 25 lb of TNT

Every earthquake near Sabana Grande Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sabana Grande Municipio 3 kmSan Germán Municipio 7 kmMaricao Municipio 9 kmYauco Municipio 12 kmLas Marías Municipio 15 kmLajas Municipio 15 kmHormigueros Municipio 16 kmGuánica Municipio 17 kmGuayanilla Municipio 21 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
6:55 pm AST on 13 August 2019 ()
Where
2 km (1 mi) north-northwest of Sabana Grande, PR · earthquakes near Sabana Grande
Magnitude
M 1.9 (md)
Depth
21 km below the surface
Felt
no reports yet
Nearest
Sabana Grande Municipio, 3 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2647 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, 2 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: Liborio Negron Torres, San Germán, Lluveras, Maricao, Lajas, Sabana Eneas.

How big was it?

This earthquake released about 25 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 5.8 600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 420,000× the energy of this one
  3. Around the size people start to feel M 3.0 38× the energy of this one
  4. This earthquake M 1.9 about 25 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.

Where

Epicentre 18.0965, -66.9693. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Sabana Grande Municipio, PR 3 km (2 mi) ESE earthquakes near Sabana Grande Municipio
San Germán Municipio, PR 7 km (5 mi) W earthquakes near San Germán Municipio
Maricao Municipio, PR 9 km (6 mi) NNE earthquakes near Maricao Municipio
Yauco Municipio, PR 12 km (7 mi) E earthquakes near Yauco Municipio
Las Marías Municipio, PR 15 km (9 mi) N earthquakes near Las Marías Municipio
Lajas Municipio, PR 15 km (9 mi) SSW earthquakes near Lajas Municipio

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

Aftershocks so far

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

  1. 1.8 2 km NNW of La Parguera, Puerto Rico
  2. 2.0 18 km WNW of Puerto Real, Puerto Rico
  3. 1.7 4 km ESE of Ponce, Puerto Rico
  4. 1.9 8 km S of Indios, Puerto Rico
  5. 1.6 2 km SSE of Ponce, Puerto Rico
  6. 1.8 6 km NE of San Sebastián, Puerto Rico
  7. 4.3 21 km WNW of Puerto Real, Puerto Rico
  8. 1.6 4 km SSE of Cabo Rojo, Puerto Rico
  9. 1.9 2 km S of Adjuntas, Puerto Rico
  10. 2.3 Puerto Rico region
  11. 1.6 3 km ESE of Sabana Grande, Puerto Rico
  12. 1.8 4 km E of Hormigueros, Puerto Rico
  13. 2.2 15 km WSW of Pole Ojea, Puerto Rico
  14. 1.8 16 km SW of Stella, Puerto Rico
  15. 1.5 5 km SW of Sabana Grande, 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.