QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8Md

55 km S of Central Aguirre, Puerto Rico

· 22 km deep · released about 480 lb of TNT

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10 km30 km60 km120 km N Salinas Municipio 58 kmGuayama Municipio 58 kmSanta Isabel Municipio 58 kmArroyo Municipio 60 kmPatillas Municipio 65 kmJuana Díaz Municipio 67 kmMaunabo Municipio 69 kmCayey Municipio 73 kmPonce Municipio 74 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
22 km below the surface
Felt
no reports yet
Nearest
Salinas Municipio, 58 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3394 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 480 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 32,000× 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 2× the energy of this one
  4. This earthquake M 2.8 about 480 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 17.4540, -66.2137. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Salinas Municipio, PR 58 km (36 mi) S of here earthquakes near Salinas Municipio
Guayama Municipio, PR 58 km (36 mi) S of here earthquakes near Guayama Municipio
Santa Isabel Municipio, PR 58 km (36 mi) SSE of here earthquakes near Santa Isabel Municipio
Arroyo Municipio, PR 60 km (38 mi) SSW of here earthquakes near Arroyo Municipio
Patillas Municipio, PR 65 km (41 mi) SSW of here earthquakes near Patillas Municipio
Juana Díaz Municipio, PR 67 km (42 mi) SSE of here earthquakes near Juana Díaz 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. 2.0 9 km SSW of Central Aguirre, Puerto Rico
  2. 2.2 9 km SSE of Jobos, Puerto Rico
  3. 2.4 14 km SSE of Central Aguirre, Puerto Rico
  4. 2.7 10 km S of Jobos, Puerto Rico
  5. 2.9 84 km S of Jobos, Puerto Rico
  6. 1.5 10 km S of Jobos, Puerto Rico
  7. 2.8 18 km SSE of Arroyo, Puerto Rico
  8. 1.6 20 km S of Arroyo, Puerto Rico
  9. 2.7 11 km S of Jauca, Puerto Rico
  10. 3.1 12 km S of Santa Isabel, Puerto Rico
  11. 3.0 94 km S of Central Aguirre, Puerto Rico
  12. 2.4 37 km S of Santa Isabel, Puerto Rico
  13. 2.8 21 km SSE of Arroyo, Puerto Rico
  14. 2.4 22 km SSE of Arroyo, Puerto Rico
  15. 2.8 43 km SSW of Potala Pastillo, 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.

On USGS

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