QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1Md

9 km SE of Pole Ojea, Puerto Rico

· 7.0 km deep · released about 43 lb of TNT

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10 km30 km60 km120 km N Lajas Municipio 11 kmCabo Rojo Municipio 11 kmGuánica Municipio 21 kmSan Germán Municipio 23 kmHormigueros Municipio 24 kmSabana Grande Municipio 26 kmYauco Municipio 33 kmMaricao Municipio 34 kmGuayanilla Municipio 35 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
7.0 km below the surface
Felt
no reports yet
Nearest
Lajas Municipio, 11 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3596 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 43 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 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 17.9171, -67.1159. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lajas Municipio, PR 11 km (7 mi) SW of here earthquakes near Lajas Municipio
Cabo Rojo Municipio, PR 11 km (7 mi) SE of here earthquakes near Cabo Rojo Municipio
Guánica Municipio, PR 21 km (13 mi) W of here earthquakes near Guánica Municipio
San Germán Municipio, PR 23 km (14 mi) SSW of here earthquakes near San Germán Municipio
Hormigueros Municipio, PR 24 km (15 mi) S of here earthquakes near Hormigueros Municipio
Sabana Grande Municipio, PR 26 km (16 mi) SW 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

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

  1. 2.0 2 km SSE of Magas Arriba, Puerto Rico
  2. 1.8 4 km WNW of Mayagüez, Puerto Rico
  3. 1.9 15 km S of Guánica, Puerto Rico
  4. 2.1 5 km NNE of Sabana Eneas, Puerto Rico
  5. 2.5 0 km S of Hormigueros, Puerto Rico
  6. 2.0 11 km SSE of Pole Ojea, Puerto Rico
  7. 2.2 8 km SW of La Parguera, Puerto Rico
  8. 2.0 7 km WNW of Puerto Real, Puerto Rico
  9. 2.5 18 km S of Tallaboa, Puerto Rico
  10. 1.5 0 km E of San Germán, Puerto Rico
  11. 1.8 2 km E of Sabana Grande, Puerto Rico
  12. 2.3 8 km S of Indios, Puerto Rico
  13. 2.1 11 km WNW of Puerto Real, Puerto Rico
  14. 2.1 3 km SE of Maricao, Puerto Rico
  15. 2.3 6 km W of La Parguera, 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.

On USGS

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