QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

16 km WNW of Rincón, Puerto Rico

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

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10 km30 km60 km120 km N Rincón Municipio 17 kmAguada Municipio 23 kmAguadilla Municipio 29 kmAñasco Municipio 30 kmMoca Municipio 34 kmHormigueros Municipio 41 kmIsabela Municipio 42 kmSan Sebastián Municipio 46 kmLas Marías Municipio 48 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
14 km below the surface
Felt
3 reports · strongest reported intensity III
Nearest
Rincón Municipio, 17 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1346 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 3 people have reported feeling it to USGS.

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 18.3835, -67.4003. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Rincón Municipio, PR 17 km (10 mi) WNW of here earthquakes near Rincón Municipio
Aguada Municipio, PR 23 km (14 mi) W of here earthquakes near Aguada Municipio
Aguadilla Municipio, PR 29 km (18 mi) WSW of here earthquakes near Aguadilla Municipio
Añasco Municipio, PR 30 km (19 mi) WNW of here earthquakes near Añasco Municipio
Moca Municipio, PR 34 km (21 mi) W of here earthquakes near Moca Municipio
Hormigueros Municipio, PR 41 km (25 mi) NW of here earthquakes near Hormigueros Municipio

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

Aftershocks so far

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

  1. 1.9 Mona Passage
  2. 2.5 3 km E of Hormigueros, Puerto Rico
  3. 2.7 2 km SSE of Boquerón, Puerto Rico
  4. 3.0 4 km NNE of San Germán, Puerto Rico
  5. 3.0 Mona Passage
  6. 2.7 21 km W of Pole Ojea, Puerto Rico
  7. 2.8 26 km NW of Aguadilla, Puerto Rico
  8. 3.0 2 km SSW of Hormigueros, Puerto Rico
  9. 3.1 18 km WSW of Stella, Puerto Rico
  10. 3.5 2 km SSE of Boquerón, Puerto Rico
  11. 2.7 2 km NNE of San Germán, Puerto Rico
  12. 2.4 1 km NNE of San Germán, Puerto Rico
  13. 2.1 3 km SSW of Hormigueros, Puerto Rico
  14. 2.3 4 km E of Hormigueros, 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 4.4 on 2017-10-01 — it released about 86 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.