QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1Md

67 km N of Culebra, Puerto Rico

Yes. A magnitude 2.1 earthquake was recorded 67 km N of Culebra, Puerto Rico, at 3:27 pm AST on 13 April 2017 (19:27 UTC), 14 km deep.

· 14 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Culebra Municipio 66 kmFajardo Municipio 68 kmLuquillo Municipio 77 kmRío Grande Municipio 83 kmCeiba Municipio 83 kmLoíza Municipio 89 kmVieques Municipio 90 kmCanóvanas Municipio 93 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 2.1 (Md)
Depth
14 km below the surface
Felt
no reports yet
Nearest
Culebra Municipio, 66 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3499 days ago

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

At this magnitude and depth, people at rest would likely notice it out to about 10 km (6 mi) from the epicentre. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

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.

For this area

The largest earthquake within 50 km since 2016 was M 4.3 on 2016-09-04 — about 2,000 times the energy of this one.

Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:

  1. 5.0 73 km NNE of Vieques, Puerto Rico · 27 km WNW of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 18.9143, -65.2539. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Culebra Municipio, PR 66 km (41 mi) S earthquakes near Culebra Municipio
Fajardo Municipio, PR 68 km (43 mi) SSW earthquakes near Fajardo Municipio
Luquillo Municipio, PR 77 km (48 mi) SW earthquakes near Luquillo Municipio
Río Grande Municipio, PR 83 km (51 mi) SW earthquakes near Río Grande Municipio
Ceiba Municipio, PR 83 km (52 mi) SSW earthquakes near Ceiba Municipio
Loíza Municipio, PR 89 km (56 mi) SW earthquakes near Loíza Municipio

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

Aftershocks so far

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

  1. 2.1 86 km N of Charlotte Amalie, U.S. Virgin Islands
  2. 2.3 101 km N of Culebra, Puerto Rico
  3. 2.1 46 km NNW of Charlotte Amalie, U.S. Virgin Islands
  4. 2.4 81 km N of Charlotte Amalie, U.S. Virgin Islands
  5. 2.0 56 km N of Charlotte Amalie, U.S. Virgin Islands
  6. 2.2 83 km NNE of Luquillo, Puerto Rico
  7. 2.4 93 km N of Culebra, Puerto Rico
  8. 2.6 79 km N of Charlotte Amalie, U.S. Virgin Islands
  9. 2.7 77 km NNE of Vieques, Puerto Rico
  10. 3.4 84 km NNE of Vieques, Puerto Rico
  11. 2.2 89 km N of Charlotte Amalie, U.S. Virgin Islands
  12. 3.1 67 km NNE of Suárez, Puerto Rico
  13. 3.3 84 km N 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.