QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

2 km WSW of Aibonito, Puerto Rico

· 16 km deep · released about 51 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Aibonito Municipio 3 kmCoamo Municipio 8 kmBarranquitas Municipio 8 kmComerío Municipio 13 kmCidra Municipio 15 kmCayey Municipio 15 kmSalinas Municipio 18 kmNaranjito Municipio 18 kmOrocovis Municipio 18 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, 3 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 931 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 51 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 5.8 300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 210,000× the energy of this one
  3. Around the size people start to feel M 3.0 19× the energy of this one
  4. This earthquake M 2.1 about 51 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 18.1298, -66.2907. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Aibonito Municipio, PR 3 km (2 mi) W of here earthquakes near Aibonito Municipio
Coamo Municipio, PR 8 km (5 mi) ENE of here earthquakes near Coamo Municipio
Barranquitas Municipio, PR 8 km (5 mi) SSE of here earthquakes near Barranquitas Municipio
Comerío Municipio, PR 13 km (8 mi) SW of here earthquakes near Comerío Municipio
Cidra Municipio, PR 15 km (9 mi) WSW of here earthquakes near Cidra Municipio
Cayey Municipio, PR 15 km (9 mi) W of here earthquakes near Cayey Municipio

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

Aftershocks so far

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

  1. 2.5 15 km SSE of Ponce, Puerto Rico
  2. 2.4 6 km SSE of Salinas, Puerto Rico
  3. 2.0 7 km SSW of Orocovis, Puerto Rico
  4. 1.6 7 km SSE of Salinas, Puerto Rico
  5. 2.4 3 km WSW of Potala Pastillo, Puerto Rico
  6. 2.0 1 km W of Ponce, Puerto Rico
  7. 2.0 5 km SW of Central Aguirre, Puerto Rico
  8. 2.3 4 km WSW of Parcelas La Milagrosa, Puerto Rico
  9. 2.5 2 km SSW of Peñuelas, Puerto Rico
  10. 2.3 11 km S of Arroyo, Puerto Rico
  11. 2.3 5 km WSW of Central Aguirre, Puerto Rico
  12. 2.3 11 km S of Arroyo, Puerto Rico
  13. 1.9 7 km ESE of G. L. Garcia, Puerto Rico
  14. 2.0 5 km S of Salinas, Puerto Rico
  15. 2.9 10 km NNW of San Juan, 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 5.0 on 2020-01-07 — it released about 19,000 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.