QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

5 km SE of La Plena, Puerto Rico

· 13 km deep · released about 21 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guayama Municipio 5 kmSalinas Municipio 10 kmCayey Municipio 11 kmArroyo Municipio 14 kmAibonito Municipio 17 kmCidra Municipio 19 kmPatillas Municipio 20 kmCoamo Municipio 22 kmSanta Isabel Municipio 24 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
Guayama Municipio, 5 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2667 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 21 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 5.8 710,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 500,000× the energy of this one
  3. Around the size people start to feel M 3.0 45× the energy of this one
  4. This earthquake M 1.9 about 21 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 18.0080, -66.1716. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guayama Municipio, PR 5 km (3 mi) NW of here earthquakes near Guayama Municipio
Salinas Municipio, PR 10 km (6 mi) ENE of here earthquakes near Salinas Municipio
Cayey Municipio, PR 11 km (7 mi) S of here earthquakes near Cayey Municipio
Arroyo Municipio, PR 14 km (9 mi) WNW of here earthquakes near Arroyo Municipio
Aibonito Municipio, PR 17 km (10 mi) SE of here earthquakes near Aibonito Municipio
Cidra Municipio, PR 19 km (12 mi) S of here earthquakes near Cidra Municipio

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

Aftershocks so far

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

  1. 1.8 18 km SSW of Central Aguirre, Puerto Rico
  2. 1.7 11 km S of Ponce, Puerto Rico
  3. 2.2 6 km S of Salinas, Puerto Rico
  4. 1.7 2 km S of Las Ochenta, Puerto Rico
  5. 2.8 12 km S of Salinas, Puerto Rico
  6. 2.4 11 km S of Salinas, Puerto Rico
  7. 1.9 7 km S of Ponce, Puerto Rico
  8. 1.7 2 km SSW of H. Rivera Colon, Puerto Rico
  9. 2.2 16 km S of Lamboglia, Puerto Rico
  10. 1.8 8 km S of Potala Pastillo, Puerto Rico
  11. 1.5 10 km SSE of Ponce, Puerto Rico
  12. 2.1 2 km NW of Galateo, Puerto Rico
  13. 1.5 13 km SSE of Ponce, Puerto Rico
  14. 1.6 12 km SSE of Ponce, Puerto Rico
  15. 1.9 5 km WNW of Aguas Buenas, 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 11,000 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.