QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

Puerto Rico region

· 54 km deep · released about 1,300 lb of TNT

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10 km30 km60 km120 km N Mayagüez Municipio 51 kmCabo Rojo Municipio 91 kmLajas Municipio 103 kmHormigueros Municipio 104 kmRincón Municipio 108 kmSan Germán Municipio 110 kmAñasco Municipio 113 kmGuánica Municipio 114 kmAguada Municipio 115 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
54 km below the surface
Felt
no reports yet
Nearest
Mayagüez Municipio, 51 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2658 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 1,300 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 6.7 270,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 12,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 8,500× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.3× 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 17.6333, -67.9466. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mayagüez Municipio, PR 51 km (31 mi) S of here earthquakes near Mayagüez Municipio
Cabo Rojo Municipio, PR 91 km (56 mi) WSW of here earthquakes near Cabo Rojo Municipio
Lajas Municipio, PR 103 km (64 mi) WSW of here earthquakes near Lajas Municipio
Hormigueros Municipio, PR 104 km (65 mi) WSW of here earthquakes near Hormigueros Municipio
Rincón Municipio, PR 108 km (67 mi) SW of here earthquakes near Rincón Municipio
San Germán Municipio, PR 110 km (68 mi) WSW of here earthquakes near San Germán Municipio

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

Aftershocks so far

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

  1. 2.6 68 km SE of Boca de Yuma, Dominican Republic
  2. 2.8 80 km SE of Boca de Yuma, Dominican Republic
  3. 3.0 83 km SW of Pole Ojea, Puerto Rico
  4. 3.6 64 km SSE of Boca de Yuma, Dominican Republic
  5. 2.8 79 km W of Pole Ojea, Puerto Rico
  6. 3.4 78 km SSE of Boca de Yuma, Dominican Republic
  7. 2.9 77 km SSE of Boca de Yuma, Dominican Republic
  8. 2.9 90 km WSW of Pole Ojea, Puerto Rico
  9. 2.9 74 km SE of Punta Cana, Dominican Republic
  10. 2.7 85 km SE of Boca de Yuma, Dominican Republic
  11. 3.2 73 km SE of Boca de Yuma, Dominican Republic
  12. 3.0 71 km ESE of Boca de Yuma, Dominican Republic
  13. 2.8 95 km SW of Pole Ojea, Puerto Rico
  14. 1.9 41 km WSW of Pole Ojea, Puerto Rico
  15. 2.8 74 km SE of Boca de Yuma, Dominican Republic

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 4.3 on 2017-07-18 — it released about 68 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.