QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

3 km SSW of Las Ochenta, Puerto Rico

· 8.0 km deep · released about 41 lb of TNT

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10 km30 km60 km120 km N Santa Isabel Municipio 6 kmSalinas Municipio 7 kmCoamo Municipio 16 kmJuana Díaz Municipio 17 kmAibonito Municipio 20 kmGuayama Municipio 21 kmVillalba Municipio 24 kmCayey Municipio 25 kmBarranquitas Municipio 27 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
8.0 km below the surface
Felt
no reports yet
Nearest
Santa Isabel Municipio, 6 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2529 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 17.9600, -66.3313. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Santa Isabel Municipio, PR 6 km (4 mi) E of here earthquakes near Santa Isabel Municipio
Salinas Municipio, PR 7 km (5 mi) W of here earthquakes near Salinas Municipio
Coamo Municipio, PR 16 km (10 mi) S of here earthquakes near Coamo Municipio
Juana Díaz Municipio, PR 17 km (11 mi) ESE of here earthquakes near Juana Díaz Municipio
Aibonito Municipio, PR 20 km (13 mi) SSW of here earthquakes near Aibonito Municipio
Guayama Municipio, PR 21 km (13 mi) W of here earthquakes near Guayama Municipio

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

Aftershocks so far

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

  1. 1.8 1 km S of Guayanilla, Puerto Rico
  2. 2.1 0 km NNW of Mariano Colón, Puerto Rico
  3. 2.6 3 km SE of Jayuya, Puerto Rico
  4. 2.3 10 km SW of Central Aguirre, Puerto Rico
  5. 2.3 8 km SE of Jobos, Puerto Rico
  6. 1.8 Puerto Rico region
  7. 2.6 8 km SE of Jobos, Puerto Rico
  8. 1.6 3 km NNE of Ponce, Puerto Rico
  9. 2.3 2 km SSW of Las Ochenta, Puerto Rico
  10. 2.0 12 km SSE of Arroyo, Puerto Rico
  11. 2.0 1 km WNW of Las Ochenta, Puerto Rico
  12. 1.5 1 km E of Jauca, Puerto Rico
  13. 2.0 2 km SE of Palmarejo, Puerto Rico
  14. 2.5 8 km S of Salinas, Puerto Rico
  15. 1.9 11 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 5,800 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.