QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

1 km WNW of Mariano Colón, Puerto Rico

· 10 km deep · released about 41 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Coamo Municipio 8 kmSanta Isabel Municipio 9 kmSalinas Municipio 11 kmAibonito Municipio 14 kmJuana Díaz Municipio 15 kmVillalba Municipio 17 kmBarranquitas Municipio 20 kmCayey Municipio 23 kmOrocovis 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
10 km below the surface
Felt
no reports yet
Nearest
Coamo Municipio, 8 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 933 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 41 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 5.8 370,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 260,000× the energy of this one
  3. Around the size people start to feel M 3.0 23× the energy of this one
  4. This earthquake M 2.1 about 41 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 18.0287, -66.3495. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Coamo Municipio, PR 8 km (5 mi) S of here earthquakes near Coamo Municipio
Santa Isabel Municipio, PR 9 km (6 mi) NNE of here earthquakes near Santa Isabel Municipio
Salinas Municipio, PR 11 km (7 mi) NW of here earthquakes near Salinas Municipio
Aibonito Municipio, PR 14 km (9 mi) SW of here earthquakes near Aibonito Municipio
Juana Díaz Municipio, PR 15 km (10 mi) ENE of here earthquakes near Juana Díaz Municipio
Villalba Municipio, PR 17 km (11 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

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

  1. 2.7 1 km W of G. L. Garcia, Puerto Rico
  2. 3.6 1 km NW of Palmarejo, Puerto Rico
  3. 2.1 3 km SSE of Magas Arriba, Puerto Rico
  4. 2.1 4 km ENE of Orocovis, Puerto Rico
  5. 2.1 1 km ESE of Magas Arriba, Puerto Rico
  6. 2.2 4 km S of Salinas, Puerto Rico
  7. 1.9 2 km WNW of Santo Domingo, Puerto Rico
  8. 2.1 0 km NNE of Magas Arriba, Puerto Rico
  9. 3.1 0 km N of Magas Arriba, Puerto Rico
  10. 2.2 10 km SSE of Indios, Puerto Rico
  11. 2.8 3 km NW of Orocovis, Puerto Rico
  12. 2.1 5 km WSW of Central Aguirre, Puerto Rico
  13. 2.1 5 km SSE of Salinas, Puerto Rico
  14. 2.3 3 km N of Guayanilla, Puerto Rico
  15. 2.3 6 km SSE of Salinas, 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 6.4 on 2020-01-07 — it released about 2,900,000 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.