QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

4 km WNW of Olimpo, Puerto Rico

· 13 km deep · released about 37 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guayama Municipio 6 kmCayey Municipio 9 kmArroyo Municipio 13 kmSalinas Municipio 13 kmCidra Municipio 17 kmAibonito Municipio 17 kmPatillas Municipio 17 kmSan Lorenzo Municipio 23 kmCaguas Municipio 23 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
13 km below the surface
Felt
no reports yet
Nearest
Guayama Municipio, 6 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 583 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 37 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 5.8 410,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 290,000× the energy of this one
  3. Around the size people start to feel M 3.0 26× the energy of this one
  4. This earthquake M 2.1 about 37 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 18.0225, -66.1483. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guayama Municipio, PR 6 km (3 mi) NNW of here earthquakes near Guayama Municipio
Cayey Municipio, PR 9 km (6 mi) S of here earthquakes near Cayey Municipio
Arroyo Municipio, PR 13 km (8 mi) WNW of here earthquakes near Arroyo Municipio
Salinas Municipio, PR 13 km (8 mi) ENE of here earthquakes near Salinas Municipio
Cidra Municipio, PR 17 km (11 mi) S of here earthquakes near Cidra Municipio
Aibonito Municipio, PR 17 km (11 mi) SE of here earthquakes near Aibonito Municipio

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

Aftershocks so far

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

  1. 2.3 7 km SSE of Ponce, Puerto Rico
  2. 2.0 0 km ENE of Santa Isabel, Puerto Rico
  3. 2.3 3 km N of Playita Cortada, Puerto Rico
  4. 2.2 1 km ESE of Santa Isabel, Puerto Rico
  5. 2.1 1 km ENE of Jauca, Puerto Rico
  6. 2.3 2 km ENE of Jauca, Puerto Rico
  7. 2.6 1 km WNW of Parcelas Peñuelas, Puerto Rico
  8. 2.5 1 km WSW of Parcelas Peñuelas, Puerto Rico
  9. 2.5 1 km WSW of Parcelas Peñuelas, Puerto Rico
  10. 2.4 1 km NNW of Parcelas Peñuelas, Puerto Rico
  11. 1.8 1 km E of Mariano Colón, Puerto Rico
  12. 2.2 1 km WNW of Parcelas Peñuelas, Puerto Rico
  13. 2.6 1 km W of Parcelas Peñuelas, Puerto Rico
  14. 2.5 0 km NNE of Jauca, Puerto Rico
  15. 2.1 2 km ENE of Río Cañas Abajo, 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 6,500 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.