QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

3 km N of Mayagüez, Puerto Rico

· 22 km deep · released about 1.3 tons of TNT

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10 km30 km60 km120 km N Añasco Municipio 6 kmHormigueros Municipio 11 kmRincón Municipio 16 kmAguada Municipio 17 kmMoca Municipio 17 kmLas Marías Municipio 18 kmSan Germán Municipio 18 kmSan Sebastián Municipio 21 kmMaricao Municipio 23 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 3.3 (md)
Depth
22 km below the surface
Felt
no reports yet
Nearest
Añasco Municipio, 6 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2251 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 1.3 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 130,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 6,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,300× the energy of this one
  4. This earthquake M 3.3 about 1.3 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.6× more

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 18.2325, -67.1436. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Añasco Municipio, PR 6 km (4 mi) SSW of here earthquakes near Añasco Municipio
Hormigueros Municipio, PR 11 km (7 mi) NNW of here earthquakes near Hormigueros Municipio
Rincón Municipio, PR 16 km (10 mi) SE of here earthquakes near Rincón Municipio
Aguada Municipio, PR 17 km (10 mi) SSE of here earthquakes near Aguada Municipio
Moca Municipio, PR 17 km (11 mi) SSW of here earthquakes near Moca Municipio
Las Marías Municipio, PR 18 km (11 mi) W of here earthquakes near Las Marías Municipio

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

Aftershocks so far

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

  1. 2.9 4 km SSE of Guánica, Puerto Rico
  2. 2.8 3 km S of Guánica, Puerto Rico
  3. 2.6 4 km WSW of Fuig, Puerto Rico
  4. 2.4 5 km SSE of Indios, Puerto Rico
  5. 2.6 5 km SSE of Guánica, Puerto Rico
  6. 2.5 6 km SE of Maria Antonia, Puerto Rico
  7. 2.9 11 km E of Maricao, Puerto Rico
  8. 2.6 3 km E of La Parguera, Puerto Rico
  9. 2.6 1 km NW of Magas Arriba, Puerto Rico
  10. 2.4 5 km SSW of Guánica, Puerto Rico
  11. 2.8 1 km ESE of Guánica, Puerto Rico
  12. 2.6 10 km SSE of Guánica, Puerto Rico
  13. 2.6 4 km SE of Indios, Puerto Rico
  14. 3.1 2 km S of Guánica, Puerto Rico
  15. 2.0 6 km S of Guánica, 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 48,000 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.