QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

Puerto Rico region

· 9.0 km deep · released about 38 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fajardo Municipio 89 kmCulebra Municipio 91 kmLuquillo Municipio 96 kmRío Grande Municipio 100 kmLoíza Municipio 103 kmCeiba Municipio 104 kmCarolina Municipio 109 kmCanóvanas Municipio 109 kmNaguabo Municipio 113 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
9.0 km below the surface
Felt
no reports yet
Nearest
Fajardo Municipio, 89 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3333 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 38 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 5.8 390,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 280,000× the energy of this one
  3. Around the size people start to feel M 3.0 25× the energy of this one
  4. This earthquake M 2.1 about 38 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 19.1416, -65.2976. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fajardo Municipio, PR 89 km (56 mi) NNE of here earthquakes near Fajardo Municipio
Culebra Municipio, PR 91 km (56 mi) N of here earthquakes near Culebra Municipio
Luquillo Municipio, PR 96 km (60 mi) NNE of here earthquakes near Luquillo Municipio
Río Grande Municipio, PR 100 km (62 mi) NNE of here earthquakes near Río Grande Municipio
Loíza Municipio, PR 103 km (64 mi) NE of here earthquakes near Loíza Municipio
Ceiba Municipio, PR 104 km (65 mi) NNE of here earthquakes near Ceiba Municipio

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

Aftershocks so far

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

  1. 3.1 108 km NNE of Suárez, Puerto Rico
  2. 3.1 81 km N of Culebra, Puerto Rico
  3. 2.5 54 km NNE of Luquillo, Puerto Rico
  4. 3.2 95 km N of Charlotte Amalie, U.S. Virgin Islands
  5. 2.5 77 km NNW of Charlotte Amalie, U.S. Virgin Islands
  6. 2.4 74 km N of Culebra, Puerto Rico
  7. 2.6 128 km NNW of Charlotte Amalie, U.S. Virgin Islands
  8. 3.4 129 km N of Charlotte Amalie, U.S. Virgin Islands
  9. 2.3 77 km N of Culebra, Puerto Rico
  10. 3.4 75 km N of Culebra, Puerto Rico
  11. 2.9 122 km N of Culebra, Puerto Rico
  12. 2.5 77 km NNW of Charlotte Amalie, U.S. Virgin Islands
  13. 2.8 73 km NNW of Charlotte Amalie, U.S. Virgin Islands
  14. 2.8 Puerto Rico region
  15. 3.1 83 km N of Culebra, 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 2,200 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.