QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

18 km SSW of Guánica, Puerto Rico

· 11 km deep · released about 430 lb of TNT

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10 km30 km60 km120 km N Guánica Municipio 16 kmLajas Municipio 21 kmGuayanilla Municipio 28 kmSabana Grande Municipio 31 kmCabo Rojo Municipio 32 kmYauco Municipio 33 kmPeñuelas Municipio 34 kmSan Germán Municipio 35 kmHormigueros Municipio 40 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 2.8 (md)
Depth
11 km below the surface
Felt
no reports yet
Nearest
Guánica Municipio, 16 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 881 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 430 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 35,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 25,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.2× the energy of this one
  4. This earthquake M 2.8 about 430 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 17.8067, -66.9555. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guánica Municipio, PR 16 km (10 mi) SSW of here earthquakes near Guánica Municipio
Lajas Municipio, PR 21 km (13 mi) SSE of here earthquakes near Lajas Municipio
Guayanilla Municipio, PR 28 km (17 mi) SW of here earthquakes near Guayanilla Municipio
Sabana Grande Municipio, PR 31 km (19 mi) S of here earthquakes near Sabana Grande Municipio
Cabo Rojo Municipio, PR 32 km (20 mi) SE of here earthquakes near Cabo Rojo Municipio
Yauco Municipio, PR 33 km (20 mi) SSW of here earthquakes near Yauco Municipio

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

Aftershocks so far

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

  1. 2.1 0 km N of Lluveras, Puerto Rico
  2. 2.1 3 km NE of Yauco, Puerto Rico
  3. 1.9 2 km W of Indios, Puerto Rico
  4. 2.5 4 km SSW of Indios, Puerto Rico
  5. 2.5 4 km S of Indios, Puerto Rico
  6. 2.8 3 km SW of Indios, Puerto Rico
  7. 2.3 2 km W of Indios, Puerto Rico
  8. 2.7 2 km SW of Indios, Puerto Rico
  9. 2.2 9 km SSE of Maria Antonia, Puerto Rico
  10. 2.4 5 km SSW of Indios, Puerto Rico
  11. 2.5 9 km SSE of Maria Antonia, Puerto Rico
  12. 2.8 10 km SSE of Indios, Puerto Rico
  13. 2.2 5 km SE of Maria Antonia, Puerto Rico
  14. 2.6 2 km ENE of Tallaboa, Puerto Rico
  15. 2.3 1 km N 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 280,000 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.