QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

4 km SSW of Adjuntas, Puerto Rico

· 20 km deep · released about 88 lb of TNT

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10 km30 km60 km120 km N Adjuntas Municipio 7 kmPeñuelas Municipio 11 kmYauco Municipio 13 kmGuayanilla Municipio 15 kmUtuado Municipio 17 kmJayuya Municipio 19 kmPonce Municipio 19 kmMaricao Municipio 22 kmLares Municipio 22 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
20 km below the surface
Felt
no reports yet
Nearest
Adjuntas Municipio, 7 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 689 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 18.1232, -66.7367. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Adjuntas Municipio, PR 7 km (4 mi) SSE of here earthquakes near Adjuntas Municipio
Peñuelas Municipio, PR 11 km (7 mi) N of here earthquakes near Peñuelas Municipio
Yauco Municipio, PR 13 km (8 mi) ENE of here earthquakes near Yauco Municipio
Guayanilla Municipio, PR 15 km (9 mi) NNE of here earthquakes near Guayanilla Municipio
Utuado Municipio, PR 17 km (10 mi) SSW of here earthquakes near Utuado Municipio
Jayuya Municipio, PR 19 km (12 mi) WSW of here earthquakes near Jayuya Municipio

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

Aftershocks so far

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

  1. 2.3 3 km SSW of Indios, Puerto Rico
  2. 2.1 6 km W of Fuig, Puerto Rico
  3. 2.3 2 km SSE of Maria Antonia, Puerto Rico
  4. 2.1 1 km WNW of Indios, Puerto Rico
  5. 2.5 3 km SSW of Indios, Puerto Rico
  6. 2.2 3 km WSW of Indios, Puerto Rico
  7. 2.5 12 km S of Guánica, Puerto Rico
  8. 2.1 3 km SSE of Guánica, Puerto Rico
  9. 2.3 5 km WSW of Guánica, Puerto Rico
  10. 1.9 1 km ENE of Lluveras, Puerto Rico
  11. 2.5 2 km ESE of Yauco, Puerto Rico
  12. 2.8 4 km SE of San Germán, Puerto Rico
  13. 2.4 0 km ENE of Yauco, Puerto Rico
  14. 2.2 6 km ESE of La Parguera, Puerto Rico
  15. 2.6 3 km SSE of Maria Antonia, 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 6.4 on 2020-01-07 — it released about 1,400,000 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.