QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

4 km SE of G. L. Garcia, Puerto Rico

· 66 km deep · released about 490 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cayey Municipio 8 kmSan Lorenzo Municipio 11 kmCidra Municipio 12 kmCaguas Municipio 12 kmPatillas Municipio 15 kmArroyo Municipio 15 kmGuayama Municipio 16 kmAguas Buenas Municipio 18 kmAibonito 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 2.8 (md)
Depth
66 km below the surface
Felt
2 reports · strongest reported intensity II
Nearest
Cayey Municipio, 8 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1211 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 490 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 31,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 22,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.9× the energy of this one
  4. This earthquake M 2.8 about 490 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 18.1040, -66.0738. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cayey Municipio, PR 8 km (5 mi) E of here earthquakes near Cayey Municipio
San Lorenzo Municipio, PR 11 km (7 mi) WSW of here earthquakes near San Lorenzo Municipio
Cidra Municipio, PR 12 km (8 mi) SE of here earthquakes near Cidra Municipio
Caguas Municipio, PR 12 km (8 mi) SSW of here earthquakes near Caguas Municipio
Patillas Municipio, PR 15 km (9 mi) NW of here earthquakes near Patillas Municipio
Arroyo Municipio, PR 15 km (9 mi) NNW of here earthquakes near Arroyo Municipio

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

Aftershocks so far

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

  1. 2.4 15 km SSE of Central Aguirre, Puerto Rico
  2. 2.4 15 km S of Central Aguirre, Puerto Rico
  3. 2.7 12 km S of Central Aguirre, Puerto Rico
  4. 2.6 18 km S of Jobos, Puerto Rico
  5. 2.5 Puerto Rico region
  6. 3.0 18 km S of Central Aguirre, Puerto Rico
  7. 2.7 16 km S of Central Aguirre, Puerto Rico
  8. 3.0 16 km S of Central Aguirre, Puerto Rico
  9. 2.5 16 km SE of El Negro, Puerto Rico
  10. 2.3 6 km S of Punta Santiago, Puerto Rico
  11. 2.9 1 km WSW of Coquí, Puerto Rico
  12. 1.9 8 km ENE of Villalba, Puerto Rico
  13. 2.1 Puerto Rico region
  14. 2.6 Puerto Rico region
  15. 2.6 2 km WNW of Bayamon, 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 480 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.