QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

2 km NNW of Guayanilla, Puerto Rico

· 13 km deep · released about 17 lb of TNT

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10 km30 km60 km120 km N Guayanilla Municipio 4 kmPeñuelas Municipio 8 kmYauco Municipio 8 kmAdjuntas Municipio 16 kmSabana Grande Municipio 17 kmGuánica Municipio 17 kmPonce Municipio 21 kmMaricao Municipio 21 kmSan Germán Municipio 26 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 1.8 (md)
Depth
13 km below the surface
Felt
no reports yet
Nearest
Guayanilla Municipio, 4 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2364 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 17 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 640,000× the energy of this one
  3. Around the size people start to feel M 3.0 57× the energy of this one
  4. This earthquake M 1.8 about 17 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 18.0391, -66.7990. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guayanilla Municipio, PR 4 km (2 mi) N of here earthquakes near Guayanilla Municipio
Peñuelas Municipio, PR 8 km (5 mi) W of here earthquakes near Peñuelas Municipio
Yauco Municipio, PR 8 km (5 mi) SE of here earthquakes near Yauco Municipio
Adjuntas Municipio, PR 16 km (10 mi) SSW of here earthquakes near Adjuntas Municipio
Sabana Grande Municipio, PR 17 km (10 mi) ESE of here earthquakes near Sabana Grande Municipio
Guánica Municipio, PR 17 km (10 mi) NE of here earthquakes near Guánica Municipio

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

Aftershocks so far

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

  1. 2.7 1 km ESE of Magas Arriba, Puerto Rico
  2. 2.4 2 km SSE of Magas Arriba, Puerto Rico
  3. 2.3 9 km SSE of Indios, Puerto Rico
  4. 1.6 9 km SE of La Parguera, Puerto Rico
  5. 2.2 2 km WSW of Santo Domingo, Puerto Rico
  6. 1.6 11 km SSE of Maria Antonia, Puerto Rico
  7. 2.6 2 km ESE of Magas Arriba, Puerto Rico
  8. 1.8 2 km SSE of Magas Arriba, Puerto Rico
  9. 1.9 10 km SSW of Tallaboa, Puerto Rico
  10. 1.6 6 km SSE of Indios, Puerto Rico
  11. 2.6 16 km SSE of Tallaboa, Puerto Rico
  12. 1.6 12 km SSE of Indios, Puerto Rico
  13. 2.9 3 km E of Magas Arriba, Puerto Rico
  14. 4.4 5 km ESE of Tallaboa, Puerto Rico
  15. 2.0 0 km N of Guayanilla, 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 7,200,000 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.