QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

3 km ESE of Jobos, Puerto Rico

· 14 km deep · released about 460 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guayama Municipio 3 kmArroyo Municipio 10 kmSalinas Municipio 14 kmPatillas Municipio 17 kmCayey Municipio 18 kmAibonito Municipio 25 kmCidra Municipio 26 kmMaunabo Municipio 26 kmSanta Isabel Municipio 27 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
14 km below the surface
Felt
3 reports · strongest reported intensity III
Nearest
Guayama Municipio, 3 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1510 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 460 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 33,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 23,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.1× the energy of this one
  4. This earthquake M 2.8 about 460 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 17.9447, -66.1353. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guayama Municipio, PR 3 km (2 mi) S of here earthquakes near Guayama Municipio
Arroyo Municipio, PR 10 km (6 mi) WSW of here earthquakes near Arroyo Municipio
Salinas Municipio, PR 14 km (9 mi) ESE of here earthquakes near Salinas Municipio
Patillas Municipio, PR 17 km (11 mi) WSW of here earthquakes near Patillas Municipio
Cayey Municipio, PR 18 km (11 mi) S of here earthquakes near Cayey Municipio
Aibonito Municipio, PR 25 km (15 mi) SSE of here earthquakes near Aibonito Municipio

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

Aftershocks so far

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

  1. 2.9 25 km SE of Emajagua, Puerto Rico
  2. 2.5 6 km NNW of Los Llanos, Puerto Rico
  3. 2.7 4 km SE of Morovis, Puerto Rico
  4. 3.1 1 km E of Salinas, Puerto Rico
  5. 3.5 14 km SSE of Lamboglia, Puerto Rico
  6. 2.2 Puerto Rico region
  7. 2.6 2 km ENE of Bayamon, Puerto Rico
  8. 2.8 17 km S of Lamboglia, Puerto Rico
  9. 3.3 1 km S of Comerío, Puerto Rico
  10. 3.2 2 km ESE of Mucarabones, Puerto Rico
  11. 2.0 0 km ENE of Parcelas La Milagrosa, Puerto Rico
  12. 3.2 3 km ENE of Guaynabo, Puerto Rico
  13. 2.3 3 km ESE of Comerío, Puerto Rico
  14. 1.8 3 km SW of Naranjito, Puerto Rico
  15. 3.4 1 km SSW of Pájaros, 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 520 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.