QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

2 km ENE of Rafael Hernandez, Puerto Rico

· 81 km deep · released about 41 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Isabela Municipio 5 kmAguadilla Municipio 9 kmMoca Municipio 12 kmQuebradillas Municipio 14 kmAguada Municipio 18 kmSan Sebastián Municipio 19 kmCamuy Municipio 21 kmAñasco Municipio 23 kmRincón Municipio 26 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
81 km below the surface
Felt
no reports yet
Nearest
Isabela Municipio, 5 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2656 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 41 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 5.8 370,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 260,000× the energy of this one
  3. Around the size people start to feel M 3.0 23× the energy of this one
  4. This earthquake M 2.1 about 41 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 18.4811, -67.0586. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Isabela Municipio, PR 5 km (3 mi) W of here earthquakes near Isabela Municipio
Aguadilla Municipio, PR 9 km (6 mi) E of here earthquakes near Aguadilla Municipio
Moca Municipio, PR 12 km (7 mi) N of here earthquakes near Moca Municipio
Quebradillas Municipio, PR 14 km (9 mi) W of here earthquakes near Quebradillas Municipio
Aguada Municipio, PR 18 km (11 mi) NE of here earthquakes near Aguada Municipio
San Sebastián Municipio, PR 19 km (12 mi) NNW of here earthquakes near San Sebastián Municipio

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

Aftershocks so far

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

  1. 2.0 0 km WNW of Maricao, Puerto Rico
  2. 1.6 12 km SW of La Playa, Puerto Rico
  3. 2.5 38 km NW of San Antonio, Puerto Rico
  4. 2.2 44 km NNW of San Antonio, Puerto Rico
  5. 1.7 2 km SSE of Cayuco, Puerto Rico
  6. 2.7 14 km SW of La Playa, Puerto Rico
  7. 1.6 5 km ENE of Sabana Grande, Puerto Rico
  8. 1.8 1 km ESE of Stella, Puerto Rico
  9. 2.0 6 km NNE of Sabana Eneas, Puerto Rico
  10. 2.3 3 km ENE of Espino, Puerto Rico
  11. 2.4 26 km N of Arecibo, Puerto Rico
  12. 1.9 8 km N of Yauco, Puerto Rico
  13. 2.5 25 km NW of Rincón, Puerto Rico
  14. 2.5 5 km NNE of Isabela, Puerto Rico
  15. 2.1 2 km E 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 2,100 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.