QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2md

21 km SSE of Lamboglia, Puerto Rico

· 10 km deep · released about 1.1 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Maunabo Municipio 22 kmPatillas Municipio 23 kmArroyo Municipio 23 kmYabucoa Municipio 29 kmGuayama Municipio 31 kmSan Lorenzo Municipio 39 kmHumacao Municipio 39 kmSalinas Municipio 42 kmCayey Municipio 42 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 3.2 (md)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Maunabo Municipio, 22 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 765 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 1.1 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 150,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 6,900× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,900× the energy of this one
  4. This earthquake M 3.2 about 1.1 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.3× more

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 17.8052, -65.9097. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Maunabo Municipio, PR 22 km (13 mi) S of here earthquakes near Maunabo Municipio
Patillas Municipio, PR 23 km (14 mi) SSE of here earthquakes near Patillas Municipio
Arroyo Municipio, PR 23 km (14 mi) SE of here earthquakes near Arroyo Municipio
Yabucoa Municipio, PR 29 km (18 mi) S of here earthquakes near Yabucoa Municipio
Guayama Municipio, PR 31 km (19 mi) SE of here earthquakes near Guayama Municipio
San Lorenzo Municipio, PR 39 km (24 mi) S of here earthquakes near San Lorenzo Municipio

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

Aftershocks so far

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

  1. 3.5 11 km SSE of Daguao, Puerto Rico
  2. 2.4 5 km SSE of Emajagua, Puerto Rico
  3. 2.8 28 km SE of El Negro, Puerto Rico
  4. 2.9 28 km SE of Emajagua, Puerto Rico
  5. 2.9 26 km SE of Emajagua, Puerto Rico
  6. 2.4 11 km SSE of Punta Santiago, Puerto Rico
  7. 2.4 7 km S of Emajagua, Puerto Rico
  8. 3.7 25 km SE of Emajagua, Puerto Rico
  9. 2.3 10 km SSE of Lamboglia, Puerto Rico
  10. 2.7 5 km SSE of G. L. Garcia, Puerto Rico
  11. 2.6 1 km NW of El Negro, Puerto Rico
  12. 2.8 5 km SSE of Bajandas, Puerto Rico
  13. 2.2 6 km SSE of Bajandas, Puerto Rico
  14. 3.3 5 km SSE of Bajandas, Puerto Rico
  15. 3.2 0 km ENE of Cidra, 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 110 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.