QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1Md

64 km N of Culebra, Puerto Rico

· 72 km deep · released about 43 lb of TNT

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10 km30 km60 km120 km N Culebra Municipio 63 kmFajardo Municipio 64 kmLuquillo Municipio 73 kmRío Grande Municipio 78 kmCeiba Municipio 79 kmLoíza Municipio 85 kmVieques Municipio 86 kmCanóvanas Municipio 89 kmNaguabo Municipio 89 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
72 km below the surface
Felt
no reports yet
Nearest
Culebra Municipio, 63 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3629 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 43 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 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 18.8897, -65.2870. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Culebra Municipio, PR 63 km (39 mi) N of here earthquakes near Culebra Municipio
Fajardo Municipio, PR 64 km (40 mi) NNE of here earthquakes near Fajardo Municipio
Luquillo Municipio, PR 73 km (45 mi) NE of here earthquakes near Luquillo Municipio
Río Grande Municipio, PR 78 km (49 mi) NE of here earthquakes near Río Grande Municipio
Ceiba Municipio, PR 79 km (49 mi) NNE of here earthquakes near Ceiba Municipio
Loíza Municipio, PR 85 km (53 mi) NE of here earthquakes near Loíza Municipio

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

Aftershocks so far

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

  1. 2.0 35 km N of Charlotte Amalie, U.S. Virgin Islands
  2. 2.9 74 km NNW of Charlotte Amalie, U.S. Virgin Islands
  3. 2.3 25 km NNE of Luquillo, Puerto Rico
  4. 3.1 44 km NNW of Charlotte Amalie, U.S. Virgin Islands
  5. 1.9 24 km N of Charlotte Amalie, U.S. Virgin Islands
  6. 2.1 62 km N of Culebra, Puerto Rico
  7. 2.9 38 km N of Culebra, Puerto Rico
  8. 2.7 96 km N of Culebra, Puerto Rico
  9. 2.2 45 km NNE of Luquillo, Puerto Rico
  10. 2.3 54 km NNE of Luquillo, Puerto Rico
  11. 2.2 61 km NNE of Luquillo, Puerto Rico
  12. 1.6 61 km NNE of Luquillo, Puerto Rico
  13. 2.8 60 km NNE of Luquillo, Puerto Rico
  14. 2.4 63 km N of Charlotte Amalie, U.S. Virgin Islands
  15. 2.5 79 km NNE of Vieques, 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 2016-09-04 — it released about 2,000 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.