QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

5 km NNW of Santo Domingo, Puerto Rico

· 8.1 km deep · released about 21 lb of TNT

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10 km30 km60 km120 km N Adjuntas Municipio 8 kmYauco Municipio 9 kmPeñuelas Municipio 11 kmGuayanilla Municipio 12 kmMaricao Municipio 19 kmSabana Grande Municipio 19 kmUtuado Municipio 19 kmLares Municipio 21 kmPonce Municipio 21 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
8.1 km below the surface
Felt
no reports yet
Nearest
Adjuntas Municipio, 8 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 937 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 21 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 5.8 730,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 520,000× the energy of this one
  3. Around the size people start to feel M 3.0 46× the energy of this one
  4. This earthquake M 1.9 about 21 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 18.1110, -66.7730. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Adjuntas Municipio, PR 8 km (5 mi) SSW of here earthquakes near Adjuntas Municipio
Yauco Municipio, PR 9 km (6 mi) ENE of here earthquakes near Yauco Municipio
Peñuelas Municipio, PR 11 km (7 mi) NNW of here earthquakes near Peñuelas Municipio
Guayanilla Municipio, PR 12 km (7 mi) NNE of here earthquakes near Guayanilla Municipio
Maricao Municipio, PR 19 km (12 mi) ESE of here earthquakes near Maricao Municipio
Sabana Grande Municipio, PR 19 km (12 mi) E of here earthquakes near Sabana Grande Municipio

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

Aftershocks so far

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

  1. 1.6 3 km SE of Palomas, Puerto Rico
  2. 2.2 6 km WSW of Guánica, Puerto Rico
  3. 2.3 6 km WSW of Fuig, Puerto Rico
  4. 2.1 6 km SW of La Parguera, Puerto Rico
  5. 2.2 10 km SSE of Indios, Puerto Rico
  6. 2.8 3 km NW of Orocovis, Puerto Rico
  7. 1.7 3 km SW of La Parguera, Puerto Rico
  8. 2.3 3 km N of Guayanilla, Puerto Rico
  9. 2.2 2 km SW of Indios, Puerto Rico
  10. 1.8 4 km SSW of Indios, Puerto Rico
  11. 2.1 1 km SW of Santo Domingo, Puerto Rico
  12. 2.2 8 km SW of Guánica, Puerto Rico
  13. 1.8 2 km WNW of Guayanilla, Puerto Rico
  14. 1.9 2 km NE of Fuig, Puerto Rico
  15. 3.4 8 km N of Arecibo, 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 5,800,000 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.