QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

10 km S of Salinas, Puerto Rico

· 4.0 km deep · released about 38 lb of TNT

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10 km30 km60 km120 km N Salinas Municipio 10 kmSanta Isabel Municipio 13 kmGuayama Municipio 19 kmJuana Díaz Municipio 24 kmCoamo Municipio 26 kmAibonito Municipio 28 kmArroyo Municipio 28 kmCayey Municipio 29 kmVillalba Municipio 33 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
4.0 km below the surface
Felt
no reports yet
Nearest
Salinas Municipio, 10 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2523 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 38 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 5.8 390,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 280,000× the energy of this one
  3. Around the size people start to feel M 3.0 25× the energy of this one
  4. This earthquake M 2.1 about 38 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 17.8823, -66.2940. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Salinas Municipio, PR 10 km (7 mi) SSW of here earthquakes near Salinas Municipio
Santa Isabel Municipio, PR 13 km (8 mi) SE of here earthquakes near Santa Isabel Municipio
Guayama Municipio, PR 19 km (12 mi) WSW of here earthquakes near Guayama Municipio
Juana Díaz Municipio, PR 24 km (15 mi) ESE of here earthquakes near Juana Díaz Municipio
Coamo Municipio, PR 26 km (16 mi) SSE of here earthquakes near Coamo Municipio
Aibonito Municipio, PR 28 km (17 mi) S of here earthquakes near Aibonito Municipio

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

Aftershocks so far

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

  1. 2.3 9 km SSW of Central Aguirre, Puerto Rico
  2. 1.8 9 km S of Emajagua, Puerto Rico
  3. 2.3 13 km SSE of Ponce, Puerto Rico
  4. 2.3 5 km S of Potala Pastillo, Puerto Rico
  5. 2.3 4 km SSW of Potala Pastillo, Puerto Rico
  6. 1.8 5 km SE of Jauca, Puerto Rico
  7. 2.6 4 km SSW of Las Ochenta, Puerto Rico
  8. 2.0 6 km SSW of Salinas, Puerto Rico
  9. 1.7 4 km SSE of Arroyo, Puerto Rico
  10. 2.0 12 km SSE of Ponce, Puerto Rico
  11. 2.4 4 km ENE of Jayuya, Puerto Rico
  12. 2.4 1 km WSW of Coco, Puerto Rico
  13. 2.0 12 km SW of Potala Pastillo, Puerto Rico
  14. 1.8 13 km SSW of Potala Pastillo, Puerto Rico
  15. 2.5 12 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 6,200 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.