QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

3 km ESE of Mayagüez, Puerto Rico

· 25 km deep · released about 890 lb of TNT

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10 km30 km60 km120 km N Hormigueros Municipio 7 kmAñasco Municipio 11 kmSan Germán Municipio 12 kmLas Marías Municipio 14 kmMaricao Municipio 19 kmMoca Municipio 21 kmSabana Grande Municipio 21 kmSan Sebastián Municipio 21 kmAguada 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 3.0 (md)
Depth
25 km below the surface
Felt
2 reports · strongest reported intensity III
Nearest
Hormigueros Municipio, 7 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2412 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 890 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 380,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 17,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 12,000× the energy of this one
  4. This earthquake M 3.0 about 890 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 18.1945, -67.1103. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hormigueros Municipio, PR 7 km (4 mi) N of here earthquakes near Hormigueros Municipio
Añasco Municipio, PR 11 km (7 mi) SSE of here earthquakes near Añasco Municipio
San Germán Municipio, PR 12 km (8 mi) NW of here earthquakes near San Germán Municipio
Las Marías Municipio, PR 14 km (9 mi) WSW of here earthquakes near Las Marías Municipio
Maricao Municipio, PR 19 km (12 mi) W of here earthquakes near Maricao Municipio
Moca Municipio, PR 21 km (13 mi) S of here earthquakes near Moca Municipio

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

Aftershocks so far

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

  1. 1.9 6 km NE of Sabana Grande, Puerto Rico
  2. 2.0 3 km SSW of Espino, Puerto Rico
  3. 2.4 13 km S of La Parguera, Puerto Rico
  4. 2.6 37 km WSW of Stella, Puerto Rico
  5. 2.8 19 km SW of Stella, Puerto Rico
  6. 2.8 3 km SW of Mayagüez, Puerto Rico
  7. 2.1 16 km S of La Parguera, Puerto Rico
  8. 2.0 17 km SSE of La Parguera, Puerto Rico
  9. 1.8 7 km WSW of Adjuntas, Puerto Rico
  10. 2.3 2 km ESE of Hormigueros, Puerto Rico
  11. 1.9 4 km N of Puerto Real, Puerto Rico
  12. 2.0 2 km SSE of Magas Arriba, Puerto Rico
  13. 1.9 8 km NNW of Puerto Real, Puerto Rico
  14. 2.1 1 km SSE of Aguada, Puerto Rico
  15. 1.9 4 km E of Rincón, 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 4.3 on 2019-09-05 — it released about 95 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.