QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

7 km SSW of Jagual, Puerto Rico

· 21 km deep · released about 40 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Lorenzo Municipio 7 kmCaguas Municipio 12 kmCayey Municipio 13 kmPatillas Municipio 13 kmArroyo Municipio 15 kmCidra Municipio 16 kmJuncos Municipio 18 kmGuayama Municipio 19 kmMaunabo Municipio 19 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
21 km below the surface
Felt
no reports yet
Nearest
San Lorenzo Municipio, 7 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 108 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 40 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 5.8 380,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 270,000× the energy of this one
  3. Around the size people start to feel M 3.0 24× the energy of this one
  4. This earthquake M 2.1 about 40 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 18.1085, -66.0318. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Lorenzo Municipio, PR 7 km (5 mi) SW of here earthquakes near San Lorenzo Municipio
Caguas Municipio, PR 12 km (7 mi) S of here earthquakes near Caguas Municipio
Cayey Municipio, PR 13 km (8 mi) E of here earthquakes near Cayey Municipio
Patillas Municipio, PR 13 km (8 mi) NNW of here earthquakes near Patillas Municipio
Arroyo Municipio, PR 15 km (9 mi) N of here earthquakes near Arroyo Municipio
Cidra Municipio, PR 16 km (10 mi) ESE of here earthquakes near Cidra Municipio

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

Aftershocks so far

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

  1. 2.5 6 km SSE of Salinas, Puerto Rico
  2. 3.1 12 km SE of Emajagua, Puerto Rico
  3. 2.0 0 km W of Mariano Colón, Puerto Rico
  4. 2.2 5 km WSW of Naranjito, Puerto Rico
  5. 3.1 2 km SW of Hato Candal, Puerto Rico
  6. 2.7 24 km SE of Emajagua, Puerto Rico
  7. 2.3 5 km NNW of Coco, Puerto Rico
  8. 2.1 10 km E of El Negro, Puerto Rico
  9. 2.9 0 km E of Parcelas Peñuelas, Puerto Rico
  10. 3.2 11 km SSE of Punta Santiago, Puerto Rico
  11. 2.1 5 km SSE of Bajandas, Puerto Rico
  12. 2.7 5 km SW of Guaynabo, Puerto Rico
  13. 2.2 0 km SE of Parcelas Peñuelas, Puerto Rico
  14. 2.1 3 km NE of La Plena, Puerto Rico
  15. 1.9 5 km SSE of Salinas, 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 4.6 on 2016-12-05 — it released about 6,000 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.