QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

11 km SSE of Arroyo, Puerto Rico

· 13 km deep · released about 88 lb of TNT

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10 km30 km60 km120 km N Arroyo Municipio 11 kmPatillas Municipio 15 kmGuayama Municipio 16 kmMaunabo Municipio 20 kmYabucoa Municipio 27 kmSalinas Municipio 27 kmCayey Municipio 29 kmSan Lorenzo Municipio 31 kmCidra Municipio 37 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 2.3 (md)
Depth
13 km below the surface
Felt
no reports yet
Nearest
Arroyo Municipio, 11 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 670 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 88 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 170,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 120,000× the energy of this one
  3. Around the size people start to feel M 3.0 11× the energy of this one
  4. This earthquake M 2.3 about 88 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 17.8717, -66.0258. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Arroyo Municipio, PR 11 km (7 mi) S of here earthquakes near Arroyo Municipio
Patillas Municipio, PR 15 km (9 mi) SSW of here earthquakes near Patillas Municipio
Guayama Municipio, PR 16 km (10 mi) SE of here earthquakes near Guayama Municipio
Maunabo Municipio, PR 20 km (12 mi) SW of here earthquakes near Maunabo Municipio
Yabucoa Municipio, PR 27 km (17 mi) SW of here earthquakes near Yabucoa Municipio
Salinas Municipio, PR 27 km (17 mi) ESE of here earthquakes near Salinas Municipio

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

Aftershocks so far

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

  1. 2.1 4 km SSW of Las Piedras, Puerto Rico
  2. 2.6 3 km SSW of Las Piedras, Puerto Rico
  3. 2.1 4 km SSE of Juncos, Puerto Rico
  4. 2.5 9 km SE of Emajagua, Puerto Rico
  5. 2.4 5 km SSW of Las Piedras, Puerto Rico
  6. 2.4 3 km SSW of Playita Cortada, Puerto Rico
  7. 2.1 22 km S of Lamboglia, Puerto Rico
  8. 2.2 9 km S of Emajagua, Puerto Rico
  9. 1.6 2 km SSE of Lamboglia, Puerto Rico
  10. 2.4 0 km SW of Santa Isabel, Puerto Rico
  11. 2.4 0 km NW of Santa Isabel, Puerto Rico
  12. 2.5 18 km WSW of Esperanza, Puerto Rico
  13. 2.1 4 km WNW of Olimpo, Puerto Rico
  14. 2.4 3 km SSW of Playita Cortada, Puerto Rico
  15. 2.3 1 km WSW of Vázquez, 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 2,700 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.