QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

25 km SW of Stella, Puerto Rico

· 59 km deep · released about 1,400 lb of TNT

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10 km30 km60 km120 km N Rincón Municipio 26 kmAguada Municipio 34 kmAñasco Municipio 34 kmHormigueros Municipio 35 kmCabo Rojo Municipio 35 kmMoca Municipio 43 kmSan Germán Municipio 44 kmAguadilla Municipio 45 kmLajas Municipio 49 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
Magnitude
M 3.1 (md)
Depth
59 km below the surface
Felt
no reports yet
Nearest
Rincón Municipio, 26 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1337 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 1,400 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 240,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,700× the energy of this one
  4. This earthquake M 3.1 about 1,400 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.5× 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.

Where

Epicentre 18.1910, -67.4408. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Rincón Municipio, PR 26 km (16 mi) SW of here earthquakes near Rincón Municipio
Aguada Municipio, PR 34 km (21 mi) SW of here earthquakes near Aguada Municipio
Añasco Municipio, PR 34 km (21 mi) WSW of here earthquakes near Añasco Municipio
Hormigueros Municipio, PR 35 km (22 mi) W of here earthquakes near Hormigueros Municipio
Cabo Rojo Municipio, PR 35 km (22 mi) NW of here earthquakes near Cabo Rojo Municipio
Moca Municipio, PR 43 km (27 mi) WSW of here earthquakes near Moca Municipio

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

Aftershocks so far

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

  1. 3.6 13 km WNW of Rincón, Puerto Rico
  2. 2.1 3 km WNW of La Parguera, Puerto Rico
  3. 3.1 12 km NW of Puerto Real, Puerto Rico
  4. 2.5 2 km SW of San Sebastián, Puerto Rico
  5. 2.2 0 km W of Monte Grande, Puerto Rico
  6. 3.4 66 km SE of Punta Cana, Dominican Republic
  7. 2.1 0 km ENE of Palmarejo, Puerto Rico
  8. 2.9 8 km SE of Pole Ojea, Puerto Rico
  9. 2.6 6 km WSW of La Parguera, Puerto Rico
  10. 2.4 6 km WNW of Hormigueros, Puerto Rico
  11. 3.0 14 km NW of Puerto Real, Puerto Rico
  12. 2.3 4 km SSE of Lajas, Puerto Rico
  13. 2.1 3 km NNE 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.5 on 2021-07-18 — it released about 110 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.