QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

Puerto Rico region

· 10 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Villalba Municipio 7 kmOrocovis Municipio 8 kmCoamo Municipio 8 kmBarranquitas Municipio 12 kmAibonito Municipio 16 kmMorovis Municipio 18 kmCorozal Municipio 19 kmCiales Municipio 19 kmJuana Díaz Municipio 19 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
10 km below the surface
Felt
no reports yet
Nearest
Villalba Municipio, 7 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1092 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 18.1540, -66.4103. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Villalba Municipio, PR 7 km (4 mi) ENE of here earthquakes near Villalba Municipio
Orocovis Municipio, PR 8 km (5 mi) SSE of here earthquakes near Orocovis Municipio
Coamo Municipio, PR 8 km (5 mi) NW of here earthquakes near Coamo Municipio
Barranquitas Municipio, PR 12 km (7 mi) WSW of here earthquakes near Barranquitas Municipio
Aibonito Municipio, PR 16 km (10 mi) W of here earthquakes near Aibonito Municipio
Morovis Municipio, PR 18 km (11 mi) S of here earthquakes near Morovis Municipio

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

Aftershocks so far

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

  1. 1.9 3 km E of Magas Arriba, Puerto Rico
  2. 1.9 Puerto Rico region
  3. 2.1 4 km NNW of Guayanilla, Puerto Rico
  4. 3.0 6 km S of Indios, Puerto Rico
  5. 2.6 10 km SSE of Indios, Puerto Rico
  6. 2.5 2 km SSE of Caguas, Puerto Rico
  7. 2.3 2 km NW of Indios, Puerto Rico
  8. 2.2 4 km SSE of Magas Arriba, Puerto Rico
  9. 2.3 6 km SSE of Salinas, Puerto Rico
  10. 2.1 2 km ENE of Magas Arriba, Puerto Rico
  11. 2.2 Puerto Rico region
  12. 2.6 0 km NE of Yauco, Puerto Rico
  13. 2.5 2 km S of Magas Arriba, Puerto Rico
  14. 2.2 4 km WSW of Tallaboa, Puerto Rico
  15. 2.0 Puerto Rico region

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 6.4 on 2020-01-07 — it released about 2,800,000 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.