QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

11 km WNW of Pole Ojea, Puerto Rico

· 18 km deep · released about 37 lb of TNT

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10 km30 km60 km120 km N Cabo Rojo Municipio 12 kmHormigueros Municipio 24 kmLajas Municipio 27 kmSan Germán Municipio 30 kmAñasco Municipio 36 kmRincón Municipio 38 kmSabana Grande Municipio 38 kmGuánica Municipio 40 kmLas Marías Municipio 42 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 2.1 (md)
Depth
18 km below the surface
Felt
no reports yet
Nearest
Cabo Rojo Municipio, 12 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2487 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 37 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 410,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 290,000× the energy of this one
  3. Around the size people start to feel M 3.0 26× the energy of this one
  4. This earthquake M 2.1 about 37 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 18.0020, -67.2945. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cabo Rojo Municipio, PR 12 km (7 mi) W of here earthquakes near Cabo Rojo Municipio
Hormigueros Municipio, PR 24 km (15 mi) SW of here earthquakes near Hormigueros Municipio
Lajas Municipio, PR 27 km (17 mi) W of here earthquakes near Lajas Municipio
San Germán Municipio, PR 30 km (18 mi) WSW of here earthquakes near San Germán Municipio
Añasco Municipio, PR 36 km (22 mi) SSW of here earthquakes near Añasco Municipio
Rincón Municipio, PR 38 km (23 mi) S of here earthquakes near Rincón 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. 2.6 4 km SSE of Maria Antonia, Puerto Rico
  2. 2.4 8 km SSE of Maria Antonia, Puerto Rico
  3. 1.8 12 km SSE of Guánica, Puerto Rico
  4. 2.1 7 km SE of Maria Antonia, Puerto Rico
  5. 2.1 8 km SSE of Maria Antonia, Puerto Rico
  6. 3.0 8 km SSE of Maria Antonia, Puerto Rico
  7. 2.2 6 km SSE of Maria Antonia, Puerto Rico
  8. 2.4 10 km SSE of Maria Antonia, Puerto Rico
  9. 4.7 5 km SSE of Maria Antonia, Puerto Rico
  10. 2.2 18 km S of La Parguera, Puerto Rico
  11. 1.6 4 km N of San Germán, Puerto Rico
  12. 2.2 2 km WNW of Palmarejo, Puerto Rico
  13. 3.3 23 km WSW of Stella, Puerto Rico
  14. 2.9 8 km SSE of Maria Antonia, Puerto Rico
  15. 2.4 1 km ESE of Espino, 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 4.3 on 2019-09-05 — it released about 2,300 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.