QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1Md

0 km N of Pastos, Puerto Rico

· 16 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Aibonito Municipio 1 kmBarranquitas Municipio 10 kmCoamo Municipio 11 kmCayey Municipio 11 kmCidra Municipio 12 kmComerío Municipio 12 kmSalinas Municipio 17 kmNaranjito Municipio 18 kmAguas Buenas Municipio 20 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
16 km below the surface
Felt
no reports yet
Nearest
Aibonito Municipio, 1 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3560 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 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.

Where

Epicentre 18.1250, -66.2575. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Aibonito Municipio, PR 1 km (1 mi) SE of here earthquakes near Aibonito Municipio
Barranquitas Municipio, PR 10 km (6 mi) SSE of here earthquakes near Barranquitas Municipio
Coamo Municipio, PR 11 km (7 mi) ENE of here earthquakes near Coamo Municipio
Cayey Municipio, PR 11 km (7 mi) WNW of here earthquakes near Cayey Municipio
Cidra Municipio, PR 12 km (7 mi) WSW of here earthquakes near Cidra Municipio
Comerío Municipio, PR 12 km (7 mi) SSW of here earthquakes near Comerío Municipio

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

Aftershocks so far

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

  1. 2.3 5 km N of Olimpo, Puerto Rico
  2. 2.2 0 km W of Luis Llorens Torres, Puerto Rico
  3. 3.0 6 km NNE of Levittown, Puerto Rico
  4. 2.5 10 km S of Emajagua, Puerto Rico
  5. 2.9 Puerto Rico region
  6. 1.7 9 km S of Ponce, Puerto Rico
  7. 2.7 5 km E of Adjuntas, Puerto Rico
  8. 3.0 18 km SSE of Lamboglia, Puerto Rico
  9. 1.8 6 km WNW of Coto Laurel, Puerto Rico
  10. 1.8 8 km SSW of Emajagua, Puerto Rico
  11. 2.3 4 km W of Ponce, Puerto Rico
  12. 2.2 10 km S of Emajagua, Puerto Rico
  13. 2.2 1 km W of Potala Pastillo, Puerto Rico
  14. 2.5 9 km S of Emajagua, Puerto Rico
  15. 2.4 11 km S of Emajagua, 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 4.6 on 2016-12-05 — it released about 5,600 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.