QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

Puerto Rico region

· 24 km deep · released about 550 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cayey Municipio 4 kmCidra Municipio 9 kmCaguas Municipio 13 kmSan Lorenzo Municipio 15 kmGuayama Municipio 16 kmAguas Buenas Municipio 16 kmAibonito Municipio 16 kmComerío Municipio 17 kmArroyo Municipio 17 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
24 km below the surface
Felt
2 reports · strongest reported intensity II
Nearest
Cayey Municipio, 4 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1242 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 550 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 28,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 19,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.7× the energy of this one
  4. This earthquake M 2.8 about 550 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 18.1118, -66.1113. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cayey Municipio, PR 4 km (3 mi) ENE of here earthquakes near Cayey Municipio
Cidra Municipio, PR 9 km (5 mi) SE of here earthquakes near Cidra Municipio
Caguas Municipio, PR 13 km (8 mi) SSW of here earthquakes near Caguas Municipio
San Lorenzo Municipio, PR 15 km (9 mi) WSW of here earthquakes near San Lorenzo Municipio
Guayama Municipio, PR 16 km (10 mi) N of here earthquakes near Guayama Municipio
Aguas Buenas Municipio, PR 16 km (10 mi) S of here earthquakes near Aguas Buenas Municipio

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

Aftershocks so far

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

  1. 3.2 6 km N of San Juan, Puerto Rico
  2. 3.0 Puerto Rico region
  3. 2.6 6 km S of Emajagua, Puerto Rico
  4. 3.3 8 km SSW of Potala Pastillo, Puerto Rico
  5. 3.6 0 km ENE of Pájaros, Puerto Rico
  6. 2.6 8 km SSW of Ciales, Puerto Rico
  7. 2.5 0 km NE of Capitanejo, Puerto Rico
  8. 2.8 5 km SSW of Capitanejo, Puerto Rico
  9. 2.9 8 km NNW of Coamo, Puerto Rico
  10. 3.0 1 km E of Jagual, Puerto Rico
  11. 2.4 8 km S of Orocovis, Puerto Rico
  12. 2.9 Puerto Rico region
  13. 3.3 8 km S of Orocovis, Puerto Rico
  14. 2.4 23 km SSE of Arroyo, Puerto Rico
  15. 2.7 2 km E of Santa Clara, 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 440 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.