QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

Earthquake near La Parguera, PR

No earthquake was likely felt in La Parguera in the 24 hours to 11:01 am AST (15:01 UTC). The last one was M 2.1, 9 km (5 mi) WNW, at 11:57 pm AST on 8 November 2026, estimated intensity II (weak) in town. Every earthquake near La Parguera

This page: a magnitude 2.1 earthquake was recorded 6 km (4 mi) west-southwest of La Parguera, PR, at 8:53 am AST on 9 August 2021 (12:53 UTC), 11 km deep.

USGS: 5 km WSW of La Parguera, Puerto Rico

28 km (18 mi) S of Mayagüez, PR · 120 km (75 mi) WSW of San Juan, PR

8:53 am AST, Aug 9, 2021 · · 11 km deep · released about 41 lb of TNT

Every earthquake near La Parguera Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lajas Municipio 7 kmCabo Rojo Municipio 10 kmGuánica Municipio 18 kmSan Germán Municipio 19 kmHormigueros Municipio 21 kmSabana Grande Municipio 22 kmYauco Municipio 29 kmMaricao Municipio 30 kmGuayanilla Municipio 32 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
8:53 am AST on 9 August 2021 ()
Where
6 km (4 mi) west-southwest of La Parguera, PR · earthquakes near La Parguera
Magnitude
M 2.1 (md)
Depth
11 km below the surface
Felt
no reports yet
Nearest
Lajas Municipio, 7 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1920 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 13 km (8 mi) from the epicentre. In La Parguera, 6 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: Pole Ojea 10 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 41 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 5.8 370,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 260,000× the energy of this one
  3. Around the size people start to feel M 3.0 23× the energy of this one
  4. This earthquake M 2.1 about 41 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 2,900,000 times the energy of this one.

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

  1. 5.2 19 km SW of Stella, Puerto Rico · 39 km NW of this epicentre
  2. 5.1 21 km SW of Stella, Puerto Rico · 38 km NW 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 17.9508, -67.0956. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Lajas Municipio, PR 7 km (4 mi) ENE earthquakes near Lajas Municipio
Cabo Rojo Municipio, PR 10 km (6 mi) WNW earthquakes near Cabo Rojo Municipio
Guánica Municipio, PR 18 km (11 mi) E earthquakes near Guánica Municipio
San Germán Municipio, PR 19 km (12 mi) NNE earthquakes near San Germán Municipio
Hormigueros Municipio, PR 21 km (13 mi) N earthquakes near Hormigueros Municipio
Sabana Grande Municipio, PR 22 km (13 mi) NE earthquakes near Sabana Grande 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. 3.0 5 km WSW of La Parguera, Puerto Rico
  2. 3.1 5 km SSW of Palmarejo, Puerto Rico
  3. 2.5 1 km NNW of Indios, Puerto Rico
  4. 2.4 3 km SSW of Peñuelas, Puerto Rico
  5. 2.6 2 km SW of Indios, Puerto Rico
  6. 2.9 6 km ENE of La Parguera, Puerto Rico
  7. 1.9 5 km SSE of Guánica, Puerto Rico
  8. 2.4 7 km SSE of Guánica, Puerto Rico
  9. 2.5 4 km ESE of Indios, Puerto Rico
  10. 3.0 1 km SSE of Maria Antonia, Puerto Rico
  11. 2.0 1 km NNW of Guayanilla, Puerto Rico
  12. 2.6 14 km S of Guánica, Puerto Rico
  13. 2.6 3 km ESE of Indios, Puerto Rico
  14. 2.8 3 km S of Magas Arriba, Puerto Rico
  15. 2.1 2 km SE of Tallaboa Alta, 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.