QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

10 km WNW of Adjuntas, Puerto Rico

· 16 km deep · released about 23 lb of TNT

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10 km30 km60 km120 km N Adjuntas Municipio 6 kmLares Municipio 10 kmUtuado Municipio 13 kmMaricao Municipio 14 kmYauco Municipio 15 kmLas Marías Municipio 18 kmSabana Grande Municipio 20 kmSan Sebastián Municipio 22 kmPeñuelas 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 1.9 (md)
Depth
16 km below the surface
Felt
no reports yet
Nearest
Adjuntas Municipio, 6 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 142 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 23 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 5.8 660,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 470,000× the energy of this one
  3. Around the size people start to feel M 3.0 42× the energy of this one
  4. This earthquake M 1.9 about 23 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 18.2110, -66.8090. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Adjuntas Municipio, PR 6 km (4 mi) WNW of here earthquakes near Adjuntas Municipio
Lares Municipio, PR 10 km (6 mi) SE of here earthquakes near Lares Municipio
Utuado Municipio, PR 13 km (8 mi) WSW of here earthquakes near Utuado Municipio
Maricao Municipio, PR 14 km (9 mi) ENE of here earthquakes near Maricao Municipio
Yauco Municipio, PR 15 km (9 mi) NNE of here earthquakes near Yauco Municipio
Las Marías Municipio, PR 18 km (11 mi) E of here earthquakes near Las Marías Municipio

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

Aftershocks so far

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

  1. 1.9 2 km SSE of Indios, Puerto Rico
  2. 1.7 3 km SSE of Indios, Puerto Rico
  3. 2.1 2 km WSW of Maricao, Puerto Rico
  4. 2.1 4 km E of Tallaboa, Puerto Rico
  5. 2.0 7 km SSW of Guánica, Puerto Rico
  6. 2.2 4 km WSW of Guánica, Puerto Rico
  7. 1.9 2 km NNE of Yauco, Puerto Rico
  8. 2.6 4 km W of Ponce, Puerto Rico
  9. 2.2 3 km WSW of Fuig, Puerto Rico
  10. 2.6 3 km WNW of Fuig, Puerto Rico
  11. 2.5 2 km WNW of Indios, Puerto Rico
  12. 2.1 2 km NW of Tallaboa, Puerto Rico
  13. 2.4 3 km E of Magas Arriba, Puerto Rico
  14. 2.5 4 km SSE of Maria Antonia, Puerto Rico
  15. 2.4 2 km SSW of Indios, 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 5,200,000 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.