QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

19 km N of Brenas, Puerto Rico

· 63 km deep · released about 51 lb of TNT

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10 km30 km60 km120 km N Dorado Municipio 21 kmVega Baja Municipio 22 kmVega Alta Municipio 23 kmToa Baja Municipio 26 kmManatí Municipio 28 kmBarceloneta Municipio 30 kmCataño Municipio 30 kmToa Alta Municipio 33 kmMorovis Municipio 37 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
63 km below the surface
Felt
no reports yet
Nearest
Dorado Municipio, 21 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2649 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 51 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 5.8 300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 210,000× the energy of this one
  3. Around the size people start to feel M 3.0 19× the energy of this one
  4. This earthquake M 2.1 about 51 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 18.6465, -66.3408. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Dorado Municipio, PR 21 km (13 mi) NNW of here earthquakes near Dorado Municipio
Vega Baja Municipio, PR 22 km (14 mi) NNE of here earthquakes near Vega Baja Municipio
Vega Alta Municipio, PR 23 km (15 mi) N of here earthquakes near Vega Alta Municipio
Toa Baja Municipio, PR 26 km (16 mi) NW of here earthquakes near Toa Baja Municipio
Manatí Municipio, PR 28 km (17 mi) NE of here earthquakes near Manatí Municipio
Barceloneta Municipio, PR 30 km (19 mi) NE of here earthquakes near Barceloneta Municipio

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

Aftershocks so far

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

  1. 2.4 51 km N of Brenas, Puerto Rico
  2. 1.8 9 km ENE of Jayuya, Puerto Rico
  3. 2.5 28 km NNE of San Juan, Puerto Rico
  4. 2.7 0 km S of Cataño, Puerto Rico
  5. 2.0 3 km WNW of Corozal, Puerto Rico
  6. 2.5 45 km N of Carrizales, Puerto Rico
  7. 2.1 22 km N of Arecibo, Puerto Rico
  8. 1.7 2 km SSW of H. Rivera Colon, Puerto Rico
  9. 2.5 17 km N of Arecibo, Puerto Rico
  10. 2.1 2 km NW of Galateo, Puerto Rico
  11. 1.9 5 km WNW of Aguas Buenas, Puerto Rico
  12. 2.5 43 km N of Carrizales, Puerto Rico
  13. 1.7 3 km N of Orocovis, Puerto Rico
  14. 2.6 Puerto Rico region
  15. 2.3 4 km N of Vega Baja, 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 4.8 on 2017-08-18 — it released about 9,400 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.