QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

0 km N of Salinas, Puerto Rico

· 7.0 km deep · released about 37 lb of TNT

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10 km30 km60 km120 km N Salinas Municipio 4 kmSanta Isabel Municipio 10 kmCoamo Municipio 15 kmAibonito Municipio 16 kmGuayama Municipio 17 kmCayey Municipio 20 kmJuana Díaz Municipio 20 kmBarranquitas Municipio 24 kmVillalba Municipio 25 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
7.0 km below the surface
Felt
no reports yet
Nearest
Salinas Municipio, 4 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2543 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 17.9858, -66.2975. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Salinas Municipio, PR 4 km (3 mi) WNW of here earthquakes near Salinas Municipio
Santa Isabel Municipio, PR 10 km (6 mi) ENE of here earthquakes near Santa Isabel Municipio
Coamo Municipio, PR 15 km (9 mi) SSE of here earthquakes near Coamo Municipio
Aibonito Municipio, PR 16 km (10 mi) SSW of here earthquakes near Aibonito Municipio
Guayama Municipio, PR 17 km (11 mi) W of here earthquakes near Guayama Municipio
Cayey Municipio, PR 20 km (13 mi) SW of here earthquakes near Cayey Municipio

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

Aftershocks so far

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

  1. 2.2 3 km ESE of Jauca, Puerto Rico
  2. 1.9 5 km SE of Jauca, Puerto Rico
  3. 1.6 14 km SSW of Potala Pastillo, Puerto Rico
  4. 1.8 2 km SSW of Las Ochenta, Puerto Rico
  5. 2.0 4 km SE of Salinas, Puerto Rico
  6. 1.6 3 km SSW of Las Ochenta, Puerto Rico
  7. 1.6 2 km ENE of Salinas, Puerto Rico
  8. 1.6 3 km SSW of Las Ochenta, Puerto Rico
  9. 1.8 2 km SW of Las Ochenta, Puerto Rico
  10. 2.1 3 km SSW of Las Ochenta, Puerto Rico
  11. 2.3 4 km SSW of Las Ochenta, Puerto Rico
  12. 1.6 3 km SSW of Las Ochenta, Puerto Rico
  13. 1.6 2 km E of Jauca, Puerto Rico
  14. 2.8 5 km SE of Jauca, Puerto Rico
  15. 1.6 2 km SSW of Las Ochenta, 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.