QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

13 km S of Central Aguirre, Puerto Rico

· 6.0 km deep · released about 430 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Salinas Municipio 16 kmGuayama Municipio 18 kmSanta Isabel Municipio 22 kmArroyo Municipio 25 kmCayey Municipio 31 kmPatillas Municipio 31 kmCoamo Municipio 33 kmAibonito Municipio 33 kmJuana Díaz Municipio 33 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
6.0 km below the surface
Felt
no reports yet
Nearest
Salinas Municipio, 16 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2135 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 430 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 35,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 25,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.2× the energy of this one
  4. This earthquake M 2.8 about 430 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 17.8343, -66.2260. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Salinas Municipio, PR 16 km (10 mi) SSE of here earthquakes near Salinas Municipio
Guayama Municipio, PR 18 km (11 mi) SSW of here earthquakes near Guayama Municipio
Santa Isabel Municipio, PR 22 km (13 mi) SE of here earthquakes near Santa Isabel Municipio
Arroyo Municipio, PR 25 km (15 mi) SW of here earthquakes near Arroyo Municipio
Cayey Municipio, PR 31 km (19 mi) SSW of here earthquakes near Cayey Municipio
Patillas Municipio, PR 31 km (19 mi) SW of here earthquakes near Patillas Municipio

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

Aftershocks so far

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

  1. 1.8 1 km ESE of Potala Pastillo, Puerto Rico
  2. 2.3 2 km N of Jagual, Puerto Rico
  3. 2.0 0 km E of Potala Pastillo, Puerto Rico
  4. 2.4 3 km NNE of Potala Pastillo, Puerto Rico
  5. 3.3 0 km NE of Potala Pastillo, Puerto Rico
  6. 3.1 2 km NE of Potala Pastillo, Puerto Rico
  7. 2.5 Puerto Rico region
  8. 2.7 8 km SSW of Capitanejo, Puerto Rico
  9. 2.3 2 km E of Ponce, Puerto Rico
  10. 2.3 1 km SSE 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 5.0 on 2020-01-07 — it released about 2,200 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.