QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

0 km NNW of Mariano Colón, Puerto Rico

· 18 km deep · released about 44 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Coamo Municipio 9 kmSalinas Municipio 10 kmSanta Isabel Municipio 10 kmAibonito Municipio 14 kmJuana Díaz Municipio 17 kmVillalba Municipio 19 kmBarranquitas Municipio 19 kmCayey Municipio 21 kmGuayama Municipio 22 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
18 km below the surface
Felt
no reports yet
Nearest
Coamo Municipio, 9 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2506 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 44 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 5.8 340,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 240,000× 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 44 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 18.0270, -66.3346. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Coamo Municipio, PR 9 km (6 mi) SSE of here earthquakes near Coamo Municipio
Salinas Municipio, PR 10 km (6 mi) NW of here earthquakes near Salinas Municipio
Santa Isabel Municipio, PR 10 km (6 mi) NE of here earthquakes near Santa Isabel Municipio
Aibonito Municipio, PR 14 km (9 mi) SSW of here earthquakes near Aibonito Municipio
Juana Díaz Municipio, PR 17 km (10 mi) E of here earthquakes near Juana Díaz Municipio
Villalba Municipio, PR 19 km (12 mi) SE of here earthquakes near Villalba 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. 2.0 12 km SSE of Ponce, Puerto Rico
  2. 2.1 11 km SSE of Ponce, Puerto Rico
  3. 2.0 Puerto Rico region
  4. 1.9 1 km SSE of Santa Isabel, Puerto Rico
  5. 2.1 13 km SW of Potala Pastillo, Puerto Rico
  6. 2.0 11 km SSE of Ponce, Puerto Rico
  7. 2.0 12 km SSE of Ponce, Puerto Rico
  8. 2.4 11 km SSE of Ponce, Puerto Rico
  9. 2.0 9 km SSE of Ponce, Puerto Rico
  10. 2.0 13 km SW of Potala Pastillo, Puerto Rico
  11. 3.0 12 km SSE of Ponce, Puerto Rico
  12. 2.0 11 km SSE of Ponce, Puerto Rico
  13. 2.0 15 km SSW of Potala Pastillo, Puerto Rico
  14. 1.9 10 km SSE of Ponce, Puerto Rico
  15. 2.1 10 km SSE of Ponce, 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 5,400 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.