QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

21 km S of Lamboglia, Puerto Rico

· 2.0 km deep · released about 630 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Arroyo Municipio 23 kmPatillas Municipio 24 kmMaunabo Municipio 25 kmGuayama Municipio 29 kmYabucoa Municipio 32 kmSalinas Municipio 39 kmSan Lorenzo Municipio 40 kmCayey Municipio 41 kmHumacao Municipio 43 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 2.9 (md)
Depth
2.0 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Arroyo Municipio, 23 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1512 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 630 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 24,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 17,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.5× the energy of this one
  4. This earthquake M 2.9 about 630 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 17.7861, -65.9531. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Arroyo Municipio, PR 23 km (14 mi) SSE of here earthquakes near Arroyo Municipio
Patillas Municipio, PR 24 km (15 mi) S of here earthquakes near Patillas Municipio
Maunabo Municipio, PR 25 km (15 mi) SSW of here earthquakes near Maunabo Municipio
Guayama Municipio, PR 29 km (18 mi) SE of here earthquakes near Guayama Municipio
Yabucoa Municipio, PR 32 km (20 mi) SSW of here earthquakes near Yabucoa Municipio
Salinas Municipio, PR 39 km (24 mi) ESE of here earthquakes near Salinas Municipio

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

Aftershocks so far

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

  1. 2.8 6 km SE of G. L. Garcia, Puerto Rico
  2. 1.6 5 km SSE of Jobos, Puerto Rico
  3. 2.1 2 km NW of Bayamon, Puerto Rico
  4. 2.0 10 km S of Salinas, Puerto Rico
  5. 2.4 28 km SSW of Central Aguirre, Puerto Rico
  6. 3.3 1 km SE of Sumidero, Puerto Rico
  7. 2.7 13 km W of Esperanza, Puerto Rico
  8. 2.3 2 km ESE of Humacao, Puerto Rico
  9. 2.0 9 km SSW of Central Aguirre, Puerto Rico
  10. 2.2 9 km SSE of Jobos, Puerto Rico
  11. 2.4 14 km SSE of Central Aguirre, Puerto Rico
  12. 2.7 1 km NE of Jauca, Puerto Rico
  13. 2.7 1 km S of G. L. Garcia, Puerto Rico
  14. 2.9 4 km SW of Gurabo, Puerto Rico
  15. 2.7 10 km S of Jobos, 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 380 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.