QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

2 km NNW of Tallaboa, Puerto Rico

· 11 km deep · released about 1,300 lb of TNT

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10 km30 km60 km120 km N Peñuelas Municipio 1 kmGuayanilla Municipio 8 kmPonce Municipio 13 kmYauco Municipio 16 kmAdjuntas Municipio 18 kmGuánica Municipio 22 kmSabana Grande Municipio 24 kmJuana Díaz Municipio 25 kmJayuya Municipio 26 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 3.1 (md)
Depth
11 km below the surface
Felt
4 reports · strongest reported intensity III
Nearest
Peñuelas Municipio, 1 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 429 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 4 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 270,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 12,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 8,500× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.3× 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 18.0187, -66.7280. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Peñuelas Municipio, PR 1 km (1 mi) S of here earthquakes near Peñuelas Municipio
Guayanilla Municipio, PR 8 km (5 mi) ENE of here earthquakes near Guayanilla Municipio
Ponce Municipio, PR 13 km (8 mi) W of here earthquakes near Ponce Municipio
Yauco Municipio, PR 16 km (10 mi) ESE of here earthquakes near Yauco Municipio
Adjuntas Municipio, PR 18 km (11 mi) S of here earthquakes near Adjuntas Municipio
Guánica Municipio, PR 22 km (14 mi) ENE of here earthquakes near Guánica Municipio

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

Aftershocks so far

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

  1. 2.2 3 km ESE of La Parguera, Puerto Rico
  2. 2.0 1 km SE of Yauco, Puerto Rico
  3. 2.1 1 km W of Indios, Puerto Rico
  4. 2.7 5 km WSW of Las Marías, Puerto Rico
  5. 2.3 1 km E of Magas Arriba, Puerto Rico
  6. 2.0 8 km SSW of Guánica, Puerto Rico
  7. 2.2 3 km WSW of Indios, Puerto Rico
  8. 2.4 3 km SSE of Magas Arriba, Puerto Rico
  9. 2.0 0 km E of Magas Arriba, Puerto Rico
  10. 2.1 4 km SSE of Maria Antonia, Puerto Rico
  11. 2.1 3 km SE of La Parguera, Puerto Rico
  12. 2.2 3 km ESE of Magas Arriba, Puerto Rico
  13. 1.5 4 km WSW of Guánica, Puerto Rico
  14. 2.3 2 km S of Tallaboa, Puerto Rico
  15. 2.2 2 km S of Tallaboa, 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 95,000 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.