QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

4 km ENE of La Plena, Puerto Rico

· 13 km deep · released about 25 lb of TNT

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10 km30 km60 km120 km N Cayey Municipio 5 kmGuayama Municipio 10 kmCidra Municipio 13 kmAibonito Municipio 13 kmSalinas Municipio 14 kmArroyo Municipio 17 kmComerío Municipio 19 kmPatillas Municipio 20 kmCoamo 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 1.9 (md)
Depth
13 km below the surface
Felt
no reports yet
Nearest
Cayey Municipio, 5 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 80 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 25 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 620,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 440,000× the energy of this one
  3. Around the size people start to feel M 3.0 39× the energy of this one
  4. This earthquake M 1.9 about 25 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 18.0605, -66.1693. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cayey Municipio, PR 5 km (3 mi) SSW of here earthquakes near Cayey Municipio
Guayama Municipio, PR 10 km (6 mi) NNW of here earthquakes near Guayama Municipio
Cidra Municipio, PR 13 km (8 mi) S of here earthquakes near Cidra Municipio
Aibonito Municipio, PR 13 km (8 mi) SE of here earthquakes near Aibonito Municipio
Salinas Municipio, PR 14 km (9 mi) NE of here earthquakes near Salinas Municipio
Arroyo Municipio, PR 17 km (10 mi) NW of here earthquakes near Arroyo Municipio

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

Aftershocks so far

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

  1. 2.5 6 km SSE of Salinas, Puerto Rico
  2. 2.1 7 km SSW of Capitanejo, Puerto Rico
  3. 2.1 7 km SSE of Ponce, Puerto Rico
  4. 1.4 8 km SSE of Ponce, Puerto Rico
  5. 1.6 7 km SSE of Ponce, Puerto Rico
  6. 3.0 6 km SSE of Ponce, Puerto Rico
  7. 3.1 12 km SE of Emajagua, Puerto Rico
  8. 3.0 7 km SSE of Ponce, Puerto Rico
  9. 1.8 9 km SSE of Ponce, Puerto Rico
  10. 2.2 1 km WNW of Aguilita, Puerto Rico
  11. 2.6 5 km NW of Guayabal, Puerto Rico
  12. 2.0 0 km W of Mariano Colón, Puerto Rico
  13. 2.4 0 km ESE of Potala Pastillo, Puerto Rico
  14. 2.3 1 km E of Coto Laurel, Puerto Rico
  15. 2.2 5 km WSW of Naranjito, 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 9,800 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.