QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4md

4 km N of Sabana Eneas, Puerto Rico

· 14 km deep · released about 1.6 tons of TNT

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10 km30 km60 km120 km N Hormigueros Municipio 4 kmSan Germán Municipio 5 kmSabana Grande Municipio 15 kmLas Marías Municipio 16 kmMaricao Municipio 16 kmLajas Municipio 17 kmCabo Rojo Municipio 18 kmAñasco Municipio 18 kmYauco Municipio 24 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 3.4 (md)
Depth
14 km below the surface
Felt
10 reports · strongest reported intensity V
Nearest
Hormigueros Municipio, 4 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1226 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 10 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.6 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 6.7 110,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 4,700× the energy of this one
  3. Magna, Utah 2020 M 5.7 3,300× the energy of this one
  4. This earthquake M 3.4 about 1.6 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 3.3× 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 18.1280, -67.0830. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hormigueros Municipio, PR 4 km (2 mi) ESE of here earthquakes near Hormigueros Municipio
San Germán Municipio, PR 5 km (3 mi) WNW of here earthquakes near San Germán Municipio
Sabana Grande Municipio, PR 15 km (9 mi) WNW of here earthquakes near Sabana Grande Municipio
Las Marías Municipio, PR 16 km (10 mi) SW of here earthquakes near Las Marías Municipio
Maricao Municipio, PR 16 km (10 mi) WSW of here earthquakes near Maricao Municipio
Lajas Municipio, PR 17 km (11 mi) NNW of here earthquakes near Lajas Municipio

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

Aftershocks so far

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

  1. 1.6 Puerto Rico region
  2. 2.4 7 km SE of La Parguera, Puerto Rico
  3. 1.9 2 km WNW of Guayanilla, Puerto Rico
  4. 2.3 5 km WSW of Gu?nica, Puerto Rico
  5. 2.4 2 km W of Indios, Puerto Rico
  6. 2.6 4 km WSW of Guánica, Puerto Rico
  7. 2.1 5 km SE of Maria Antonia, Puerto Rico
  8. 2.6 5 km SSW of Indios, Puerto Rico
  9. 2.4 4 km WSW of Guánica, Puerto Rico
  10. 1.6 4 km SSW of Liborio Negron Torres, Puerto Rico
  11. 2.3 8 km S of Indios, Puerto Rico
  12. 2.4 3 km NNW of Tallaboa, Puerto Rico
  13. 2.0 5 km WSW of Guánica, Puerto Rico
  14. 2.1 3 km SW of Liborio Negron Torres, Puerto Rico
  15. 2.6 5 km NNE of San Germán, 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 38,000 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.