QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

3 km NW of Quebradillas, Puerto Rico

· 16 km deep · released about 41 lb of TNT

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10 km30 km60 km120 km N Quebradillas Municipio 5 kmIsabela Municipio 6 kmCamuy Municipio 12 kmHatillo Municipio 18 kmMoca Municipio 18 kmSan Sebastián Municipio 19 kmAguadilla Municipio 19 kmLares Municipio 27 kmAguada Municipio 27 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 2.1 (md)
Depth
16 km below the surface
Felt
no reports yet
Nearest
Quebradillas Municipio, 5 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2731 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

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.

Where

Epicentre 18.4998, -66.9610. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Quebradillas Municipio, PR 5 km (3 mi) NW of here earthquakes near Quebradillas Municipio
Isabela Municipio, PR 6 km (4 mi) ENE of here earthquakes near Isabela Municipio
Camuy Municipio, PR 12 km (7 mi) WNW of here earthquakes near Camuy Municipio
Hatillo Municipio, PR 18 km (11 mi) WNW of here earthquakes near Hatillo Municipio
Moca Municipio, PR 18 km (11 mi) NE of here earthquakes near Moca Municipio
San Sebastián Municipio, PR 19 km (12 mi) N of here earthquakes near San Sebastián Municipio

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

Aftershocks so far

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

  1. 2.6 40 km N of San Antonio, Puerto Rico
  2. 2.0 Mona Passage
  3. 1.9 6 km ESE of Maricao, Puerto Rico
  4. 2.1 5 km NW of Rincón, Puerto Rico
  5. 2.2 11 km NNE of Arecibo, Puerto Rico
  6. 1.8 1 km N of Monte Grande, Puerto Rico
  7. 2.2 20 km WNW of Rincón, Puerto Rico
  8. 1.7 9 km NNW of San Antonio, Puerto Rico
  9. 2.9 48 km N of Hatillo, Puerto Rico
  10. 2.5 22 km NW of Rincón, Puerto Rico
  11. 1.6 4 km SW of Maricao, Puerto Rico
  12. 1.8 2 km WNW of Sabana Grande, Puerto Rico
  13. 2.3 39 km N of Hatillo, Puerto Rico
  14. 1.5 1 km NNW of Animas, Puerto Rico
  15. 1.9 2 km N of Animas, 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 4.3 on 2017-10-14 — it released about 2,100 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.