QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

29 km S of Arroyo, Puerto Rico

· 34 km deep · released about 170 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Arroyo Municipio 31 kmGuayama Municipio 33 kmPatillas Municipio 34 kmMaunabo Municipio 36 kmSalinas Municipio 39 kmYabucoa Municipio 44 kmCayey Municipio 47 kmSanta Isabel Municipio 48 kmSan Lorenzo Municipio 50 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 2.5 (md)
Depth
34 km below the surface
Felt
no reports yet
Nearest
Arroyo Municipio, 31 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 347 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 170 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 89,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 63,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.6× the energy of this one
  4. This earthquake M 2.5 about 170 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 17.6975, -66.0265. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Arroyo Municipio, PR 31 km (19 mi) S of here earthquakes near Arroyo Municipio
Guayama Municipio, PR 33 km (20 mi) SSE of here earthquakes near Guayama Municipio
Patillas Municipio, PR 34 km (21 mi) S of here earthquakes near Patillas Municipio
Maunabo Municipio, PR 36 km (23 mi) SSW of here earthquakes near Maunabo Municipio
Salinas Municipio, PR 39 km (24 mi) SE of here earthquakes near Salinas Municipio
Yabucoa Municipio, PR 44 km (27 mi) SSW of here earthquakes near Yabucoa Municipio

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

Aftershocks so far

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

  1. 3.7 29 km SSW of Esperanza, Puerto Rico
  2. 2.7 3 km SE of Jobos, Puerto Rico
  3. 1.5 1 km NE of Vázquez, Puerto Rico
  4. 1.6 2 km ESE of Jobos, Puerto Rico
  5. 2.1 2 km SE of Jobos, Puerto Rico
  6. 1.5 6 km S of Central Aguirre, Puerto Rico
  7. 2.6 2 km WSW of G. L. Garcia, Puerto Rico
  8. 2.0 2 km SSW of Vázquez, Puerto Rico
  9. 1.9 0 km SW of G. L. Garcia, Puerto Rico
  10. 2.6 26 km SE of El Negro, Puerto Rico
  11. 3.0 30 km SSW of Esperanza, Puerto Rico
  12. 1.6 1 km SW of G. L. Garcia, Puerto Rico
  13. 1.8 7 km ESE of G. L. Garcia, Puerto Rico
  14. 2.4 3 km SSE of Salinas, Puerto Rico
  15. 1.7 1 km WSW of G. L. Garcia, 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 1,400 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.