QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

4 km WNW of La Parguera, Puerto Rico

· 16 km deep · released about 25 lb of TNT

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10 km30 km60 km120 km N Lajas Municipio 5 kmCabo Rojo Municipio 10 kmSan Germán Municipio 13 kmHormigueros Municipio 16 kmSabana Grande Municipio 17 kmGuánica Municipio 18 kmMaricao Municipio 25 kmYauco Municipio 26 kmLas Marías Municipio 28 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 1.9 (md)
Depth
16 km below the surface
Felt
no reports yet
Nearest
Lajas Municipio, 5 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2553 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 25 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 620,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 440,000× the energy of this one
  3. Around the size people start to feel M 3.0 39× the energy of this one
  4. This earthquake M 1.9 about 25 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 17.9971, -67.0828. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lajas Municipio, PR 5 km (3 mi) WNW of here earthquakes near Lajas Municipio
Cabo Rojo Municipio, PR 10 km (6 mi) E of here earthquakes near Cabo Rojo Municipio
San Germán Municipio, PR 13 km (8 mi) SSW of here earthquakes near San Germán Municipio
Hormigueros Municipio, PR 16 km (10 mi) SSE of here earthquakes near Hormigueros Municipio
Sabana Grande Municipio, PR 17 km (11 mi) SW of here earthquakes near Sabana Grande Municipio
Guánica Municipio, PR 18 km (11 mi) WNW of here earthquakes near Guánica Municipio

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

Aftershocks so far

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

  1. 1.6 11 km ESE of Maricao, Puerto Rico
  2. 2.0 8 km S of La Parguera, Puerto Rico
  3. 2.0 15 km S of Tallaboa, Puerto Rico
  4. 1.6 0 km NW of Cabo Rojo, Puerto Rico
  5. 1.7 3 km WNW of Pole Ojea, Puerto Rico
  6. 1.7 1 km S of Liborio Negron Torres, Puerto Rico
  7. 1.9 4 km WNW of Fuig, Puerto Rico
  8. 2.0 10 km W of Adjuntas, Puerto Rico
  9. 2.6 31 km W of Puerto Real, Puerto Rico
  10. 1.9 11 km SSE of La Parguera, Puerto Rico
  11. 2.4 7 km ESE of Maricao, Puerto Rico
  12. 1.8 12 km N of Yauco, Puerto Rico
  13. 1.6 11 km SE of La Parguera, Puerto Rico
  14. 1.8 7 km WNW of Puerto Real, Puerto Rico
  15. 2.3 7 km WSW 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 4.3 on 2019-09-05 — it released about 3,500 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.