QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

15 km S of Salinas, Puerto Rico

· 12 km deep · released about 41 lb of TNT

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10 km30 km60 km120 km N Santa Isabel Municipio 15 kmSalinas Municipio 15 kmGuayama Municipio 23 kmJuana Díaz Municipio 26 kmCoamo Municipio 30 kmArroyo Municipio 32 kmAibonito Municipio 32 kmCayey Municipio 34 kmPonce Municipio 36 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
12 km below the surface
Felt
no reports yet
Nearest
Santa Isabel Municipio, 15 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2643 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 17.8415, -66.3081. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Santa Isabel Municipio, PR 15 km (9 mi) SE of here earthquakes near Santa Isabel Municipio
Salinas Municipio, PR 15 km (9 mi) SSW of here earthquakes near Salinas Municipio
Guayama Municipio, PR 23 km (14 mi) SW of here earthquakes near Guayama Municipio
Juana Díaz Municipio, PR 26 km (16 mi) SE of here earthquakes near Juana Díaz Municipio
Coamo Municipio, PR 30 km (18 mi) S of here earthquakes near Coamo Municipio
Arroyo Municipio, PR 32 km (20 mi) WSW of here earthquakes near Arroyo Municipio

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

Aftershocks so far

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

  1. 1.9 Puerto Rico region
  2. 1.6 12 km SSE of Ponce, Puerto Rico
  3. 1.8 7 km SSW of Arroyo, Puerto Rico
  4. 1.5 6 km SSW of Arroyo, Puerto Rico
  5. 1.6 6 km SSW of Arroyo, Puerto Rico
  6. 2.2 12 km SSE of Ponce, Puerto Rico
  7. 2.2 Puerto Rico region
  8. 2.5 7 km SSW of Arroyo, Puerto Rico
  9. 1.5 13 km SSE of Ponce, Puerto Rico
  10. 1.5 8 km S of Salinas, Puerto Rico
  11. 1.9 Puerto Rico region
  12. 2.2 12 km SSE of Ponce, Puerto Rico
  13. 1.8 15 km S of Tallaboa, Puerto Rico
  14. 1.6 13 km SSE of Ponce, Puerto Rico
  15. 2.0 9 km SW of Potala Pastillo, 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.