QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

2 km N of Sabana Grande, Puerto Rico

· 8.0 km deep · released about 19 lb of TNT

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10 km30 km60 km120 km N Sabana Grande Municipio 2 kmMaricao Municipio 8 kmSan Germán Municipio 8 kmYauco Municipio 11 kmLas Marías Municipio 14 kmLajas Municipio 16 kmHormigueros Municipio 17 kmGuánica Municipio 18 kmGuayanilla Municipio 20 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
8.0 km below the surface
Felt
no reports yet
Nearest
Sabana Grande Municipio, 2 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2459 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 19 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 5.8 790,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 560,000× the energy of this one
  3. Around the size people start to feel M 3.0 50× the energy of this one
  4. This earthquake M 1.9 about 19 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 18.1041, -66.9590. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sabana Grande Municipio, PR 2 km (2 mi) NNW of here earthquakes near Sabana Grande Municipio
Maricao Municipio, PR 8 km (5 mi) SSW of here earthquakes near Maricao Municipio
San Germán Municipio, PR 8 km (5 mi) E of here earthquakes near San Germán Municipio
Yauco Municipio, PR 11 km (7 mi) W of here earthquakes near Yauco Municipio
Las Marías Municipio, PR 14 km (9 mi) S of here earthquakes near Las Marías Municipio
Lajas Municipio, PR 16 km (10 mi) NNE of here earthquakes near Lajas Municipio

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

Aftershocks so far

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

  1. 2.8 11 km SSE of Maria Antonia, Puerto Rico
  2. 3.6 6 km SSW of Indios, Puerto Rico
  3. 2.1 7 km S of Guánica, Puerto Rico
  4. 1.6 5 km S of Guánica, Puerto Rico
  5. 2.1 5 km S of Guánica, Puerto Rico
  6. 1.7 3 km WNW of Guayanilla, Puerto Rico
  7. 2.9 8 km SSE of Maria Antonia, Puerto Rico
  8. 2.1 12 km S of Guánica, Puerto Rico
  9. 1.6 9 km SSE of Guánica, Puerto Rico
  10. 2.5 11 km SSE of Maria Antonia, Puerto Rico
  11. 1.9 13 km SSE of Ponce, Puerto Rico
  12. 1.9 7 km SSE of Maria Antonia, Puerto Rico
  13. 2.8 8 km SSE of Maria Antonia, Puerto Rico
  14. 2.2 9 km S of Guánica, Puerto Rico
  15. 2.7 7 km SE of Maria Antonia, 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 5.0 on 2019-12-29 — it released about 50,000 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.