QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

4 km ESE of Palmarejo, Puerto Rico

· 53 km deep · released about 37 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Aibonito Municipio 8 kmCoamo Municipio 9 kmSalinas Municipio 10 kmCayey Municipio 15 kmBarranquitas Municipio 16 kmSanta Isabel Municipio 16 kmCidra Municipio 18 kmGuayama Municipio 18 kmComerío Municipio 20 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
53 km below the surface
Felt
no reports yet
Nearest
Aibonito Municipio, 8 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2864 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 18.0598, -66.2860. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Aibonito Municipio, PR 8 km (5 mi) SSW of here earthquakes near Aibonito Municipio
Coamo Municipio, PR 9 km (6 mi) ESE of here earthquakes near Coamo Municipio
Salinas Municipio, PR 10 km (6 mi) NNW of here earthquakes near Salinas Municipio
Cayey Municipio, PR 15 km (9 mi) WSW of here earthquakes near Cayey Municipio
Barranquitas Municipio, PR 16 km (10 mi) S of here earthquakes near Barranquitas Municipio
Santa Isabel Municipio, PR 16 km (10 mi) NE of here earthquakes near Santa Isabel Municipio

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

Aftershocks so far

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

  1. 1.7 6 km S of Tallaboa, Puerto Rico
  2. 1.9 8 km S of Tallaboa, Puerto Rico
  3. 1.7 7 km SSW of Tallaboa, Puerto Rico
  4. 1.6 1 km W of Tallaboa, Puerto Rico
  5. 1.8 8 km S of Tallaboa, Puerto Rico
  6. 1.9 10 km S of Tallaboa, Puerto Rico
  7. 1.8 20 km SSE of Tallaboa, Puerto Rico
  8. 1.9 11 km S of Tallaboa, Puerto Rico
  9. 1.8 7 km S of Tallaboa, Puerto Rico
  10. 2.2 8 km S of Tallaboa, Puerto Rico
  11. 2.1 8 km S of Tallaboa, Puerto Rico
  12. 2.0 8 km S of Tallaboa, Puerto Rico
  13. 2.1 8 km S of Tallaboa, Puerto Rico
  14. 1.9 9 km S of Tallaboa, Puerto Rico
  15. 1.5 8 km S of Tallaboa, 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.