QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

Earthquake near Stella, PR

No earthquake was likely felt in Stella in the 24 hours to 4:27 pm AST (20:27 UTC). The last one was M 3.4, 55 km (34 mi) NNE, at 9:00 pm AST on 27 October 2026, estimated intensity II (weak) in town. Every earthquake near Stella

This page: a magnitude 3.3 earthquake was recorded 16 km (10 mi) south-southwest of Stella, PR, at 11:10 pm AST on 21 June 2024 (03:10 UTC), 118 km deep.

USGS: 15 km SSW of Stella, Puerto Rico

18 km (11 mi) W of Mayagüez, PR · 134 km (83 mi) W of San Juan, PR

11:10 pm AST, Jun 21, 2024 · · 118 km deep · released about 1.2 tons of TNT

Every earthquake near Stella Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Rincón Municipio 17 kmAñasco Municipio 22 kmHormigueros Municipio 22 kmAguada Municipio 24 kmCabo Rojo Municipio 26 kmSan Germán Municipio 31 kmMoca Municipio 32 kmLas Marías Municipio 36 kmAguadilla Municipio 36 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
11:10 pm AST on 21 June 2024 ()
Where
16 km (10 mi) south-southwest of Stella, PR · earthquakes near Stella
Magnitude
M 3.3 (md)
Depth
118 km below the surface
Felt
no reports yet
Nearest
Rincón Municipio, 17 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 873 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 it was probably too small to be felt, even directly above it. In Stella, 16 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: La Playa, Rincón, Mayagüez, Puerto Real, Hormigueros, Las Marias.

How big was it?

This earthquake released about 1.2 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 140,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 6,500× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,600× the energy of this one
  4. This earthquake M 3.3 about 1.2 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.5× more

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 5.3 on 2020-07-03 — about 1,100 times the energy of this one.

Before 2016, the USGS record lists 6 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.4 32 km NW of Aguadilla, Puerto Rico · 47 km N of this epicentre
  2. 6.3 6 km WNW of Aguadilla, Puerto Rico · 29 km NNE of this epicentre
  3. 6.1 15 km WNW of San Antonio, Puerto Rico · 40 km NNE of this epicentre
  4. 5.8 4 km E of Moca, Puerto Rico · 34 km NE of this epicentre
  5. 5.2 19 km SW of Stella, Puerto Rico · 6 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 18.1957, -67.3120. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Rincón Municipio, PR 17 km (11 mi) NNE earthquakes near Rincón Municipio
Añasco Municipio, PR 22 km (13 mi) ENE earthquakes near Añasco Municipio
Hormigueros Municipio, PR 22 km (14 mi) ESE earthquakes near Hormigueros Municipio
Aguada Municipio, PR 24 km (15 mi) NNE earthquakes near Aguada Municipio
Cabo Rojo Municipio, PR 26 km (16 mi) SSE earthquakes near Cabo Rojo Municipio
San Germán Municipio, PR 31 km (19 mi) ESE earthquakes near San Germán Municipio

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

Aftershocks so far

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

  1. 2.5 6 km WSW of Guánica, Puerto Rico
  2. 2.4 7 km SW of La Parguera, Puerto Rico
  3. 2.4 5 km WSW of Liborio Negron Torres, Puerto Rico
  4. 2.1 8 km SSE of La Parguera, Puerto Rico
  5. 2.5 6 km E of La Parguera, Puerto Rico
  6. 3.0 5 km SW of Liborio Negron Torres, Puerto Rico
  7. 3.2 25 km WSW of Stella, Puerto Rico
  8. 2.4 6 km W of Maricao, Puerto Rico
  9. 1.5 2 km NW of Las Marias, Puerto Rico
  10. 2.5 4 km WNW of San Sebastián, Puerto Rico
  11. 2.7 9 km SW of La Parguera, Puerto Rico
  12. 2.3 5 km ESE of Lajas, Puerto Rico
  13. 3.0 5 km WSW of Guánica, Puerto Rico
  14. 3.0 33 km WNW of Rincón, Puerto Rico
  15. 2.4 1 km ESE of La Parguera, 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.