QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

2 km N of Hormigueros, Puerto Rico

· 27 km deep · released about 9 lb of TNT

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10 km30 km60 km120 km N Hormigueros Municipio 3 kmSan Germán Municipio 11 kmAñasco Municipio 14 kmLas Marías Municipio 17 kmCabo Rojo Municipio 19 kmMaricao Municipio 20 kmSabana Grande Municipio 20 kmLajas Municipio 22 kmRincón 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 1.6 (md)
Depth
27 km below the surface
Felt
no reports yet
Nearest
Hormigueros Municipio, 3 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2521 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 9 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,200,000× the energy of this one
  3. Around the size people start to feel M 3.0 110× the energy of this one
  4. This earthquake M 1.6 about 9 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 18.1578, -67.1243. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hormigueros Municipio, PR 3 km (2 mi) NNW of here earthquakes near Hormigueros Municipio
San Germán Municipio, PR 11 km (7 mi) WNW of here earthquakes near San Germán Municipio
Añasco Municipio, PR 14 km (9 mi) S of here earthquakes near Añasco Municipio
Las Marías Municipio, PR 17 km (11 mi) WSW of here earthquakes near Las Marías Municipio
Cabo Rojo Municipio, PR 19 km (12 mi) NNE of here earthquakes near Cabo Rojo Municipio
Maricao Municipio, PR 20 km (12 mi) W of here earthquakes near Maricao Municipio

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

Aftershocks so far

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

  1. 1.9 0 km SW of Las Marías, Puerto Rico
  2. 1.7 5 km ENE of Hormigueros, Puerto Rico
  3. 1.9 3 km SSW of Las Marías, Puerto Rico
  4. 1.6 1 km NW of Sabana Eneas, Puerto Rico
  5. 2.1 1 km SW of San Antonio, Puerto Rico
  6. 2.1 7 km SW of La Playa, Puerto Rico
  7. 2.6 18 km W of Rincón, Puerto Rico
  8. 2.5 7 km NNW of Puerto Real, Puerto Rico
  9. 2.0 7 km NW of Puerto Real, Puerto Rico
  10. 1.9 21 km WNW of Puerto Real, Puerto Rico
  11. 2.0 1 km NE of Hormigueros, Puerto Rico
  12. 2.0 6 km NNE of Sabana Grande, Puerto Rico
  13. 2.3 6 km NW of Aguada, Puerto Rico
  14. 2.3 1 km ENE of Stella, Puerto Rico
  15. 2.1 8 km SW of La Parguera, 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 9,400 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.