QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

74 km N of Culebra, Puerto Rico

· 50 km deep · released about 420 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fajardo Municipio 69 kmCulebra Municipio 72 kmLuquillo Municipio 76 kmRío Grande Municipio 81 kmCeiba Municipio 84 kmLoíza Municipio 85 kmCanóvanas Municipio 90 kmCarolina Municipio 90 kmNaguabo Municipio 93 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 2.8 (md)
Depth
50 km below the surface
Felt
no reports yet
Nearest
Fajardo Municipio, 69 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2712 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 420 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 36,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 26,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.3× the energy of this one
  4. This earthquake M 2.8 about 420 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 18.9725, -65.3636. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fajardo Municipio, PR 69 km (43 mi) NNE of here earthquakes near Fajardo Municipio
Culebra Municipio, PR 72 km (45 mi) N of here earthquakes near Culebra Municipio
Luquillo Municipio, PR 76 km (48 mi) NNE of here earthquakes near Luquillo Municipio
Río Grande Municipio, PR 81 km (50 mi) NE of here earthquakes near Río Grande Municipio
Ceiba Municipio, PR 84 km (52 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

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

  1. 2.6 78 km NNW of Charlotte Amalie, U.S. Virgin Islands
  2. 2.7 77 km N of Charlotte Amalie, U.S. Virgin Islands
  3. 3.3 56 km NNW of Charlotte Amalie, U.S. Virgin Islands
  4. 2.0 42 km NNE of Luquillo, Puerto Rico
  5. 3.0 56 km NNE of Luquillo, Puerto Rico
  6. 2.7 52 km NNE of Luquillo, Puerto Rico
  7. 2.8 42 km NNE of Luquillo, Puerto Rico
  8. 2.9 39 km NNE of Luquillo, Puerto Rico
  9. 3.4 114 km NNE of Vieques, Puerto Rico
  10. 3.0 61 km N of Culebra, Puerto Rico
  11. 2.9 62 km N of Culebra, Puerto Rico
  12. 3.2 73 km NNW of Charlotte Amalie, U.S. Virgin Islands
  13. 2.5 65 km N of Charlotte Amalie, U.S. Virgin Islands
  14. 3.1 96 km NNW of Charlotte Amalie, U.S. Virgin Islands
  15. 2.2 41 km NNW of Charlotte Amalie, U.S. Virgin Islands

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 4.5 on 2018-03-06 — it released about 410 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.