QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

17 km N of San Antonio, Puerto Rico

· 76 km deep · released about 46 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Aguadilla Municipio 18 kmIsabela Municipio 22 kmQuebradillas Municipio 29 kmMoca Municipio 30 kmAguada Municipio 31 kmCamuy Municipio 36 kmRincón Municipio 36 kmSan Sebastián Municipio 39 kmAñasco Municipio 40 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
76 km below the surface
Felt
no reports yet
Nearest
Aguadilla Municipio, 18 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3235 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 46 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 5.8 330,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 21× the energy of this one
  4. This earthquake M 2.1 about 46 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 18.6453, -67.1286. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Aguadilla Municipio, PR 18 km (11 mi) N of here earthquakes near Aguadilla Municipio
Isabela Municipio, PR 22 km (13 mi) NW of here earthquakes near Isabela Municipio
Quebradillas Municipio, PR 29 km (18 mi) NW of here earthquakes near Quebradillas Municipio
Moca Municipio, PR 30 km (19 mi) N of here earthquakes near Moca Municipio
Aguada Municipio, PR 31 km (19 mi) NNE of here earthquakes near Aguada Municipio
Camuy Municipio, PR 36 km (22 mi) NW of here earthquakes near Camuy Municipio

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

Aftershocks so far

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

  1. 2.7 20 km W of Rincón, Puerto Rico
  2. 2.3 5 km N of Hatillo, Puerto Rico
  3. 2.3 32 km NW of San Antonio, Puerto Rico
  4. 2.7 19 km WNW of Rincón, Puerto Rico
  5. 2.7 21 km W of Rincón, Puerto Rico
  6. 3.2 57 km NNE of Isabela, Puerto Rico
  7. 2.5 Mona Passage
  8. 2.8 39 km NW of San Antonio, Puerto Rico
  9. 2.8 56 km N of Hatillo, Puerto Rico
  10. 3.0 11 km N of Camuy, Puerto Rico
  11. 2.5 18 km N of Arecibo, Puerto Rico
  12. 2.9 6 km NNW of Camuy, Puerto Rico
  13. 3.0 65 km N of Isabela, Puerto Rico
  14. 3.1 53 km N of Isabela, Puerto Rico
  15. 2.5 0 km NNE of Mayagüez, 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 1,900 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.