QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6md

17 km N of Brenas, Puerto Rico

· 66 km deep · released about 280 lb of TNT

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10 km30 km60 km120 km N Dorado Municipio 19 kmVega Baja Municipio 21 kmVega Alta Municipio 21 kmToa Baja Municipio 24 kmManatí Municipio 27 kmCataño Municipio 28 kmBarceloneta Municipio 30 kmToa Alta Municipio 31 kmBayamón 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 2.6 (md)
Depth
66 km below the surface
Felt
no reports yet
Nearest
Dorado Municipio, 19 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2491 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 280 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 53,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 38,000× the energy of this one
  3. Around the size people start to feel M 3.0 3.3× the energy of this one
  4. This earthquake M 2.6 about 280 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 18.6293, -66.3295. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Dorado Municipio, PR 19 km (12 mi) NNW of here earthquakes near Dorado Municipio
Vega Baja Municipio, PR 21 km (13 mi) NNE of here earthquakes near Vega Baja Municipio
Vega Alta Municipio, PR 21 km (13 mi) N of here earthquakes near Vega Alta Municipio
Toa Baja Municipio, PR 24 km (15 mi) NW of here earthquakes near Toa Baja Municipio
Manatí Municipio, PR 27 km (17 mi) NE of here earthquakes near Manatí Municipio
Cataño Municipio, PR 28 km (17 mi) NW of here earthquakes near Cataño Municipio

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

Aftershocks so far

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

  1. 3.2 38 km NNW of Brenas, Puerto Rico
  2. 2.4 3 km NNW of Barranquitas, Puerto Rico
  3. 2.9 58.9 km S of Tierras Nuevas Poniente, Puerto Rico
  4. 2.8 1 km ESE of Orocovis, Puerto Rico
  5. 2.7 0 km WSW of Galateo, Puerto Rico
  6. 2.8 6 km NE of Orocovis, Puerto Rico
  7. 3.1 7 km N of Arecibo, Puerto Rico
  8. 3.1 51 km N of Dorado, Puerto Rico
  9. 3.2 44 km N of Arecibo, Puerto Rico
  10. 2.2 16 km N of Arecibo, Puerto Rico
  11. 3.1 3 km NNW of Loíza, Puerto Rico
  12. 3.5 6 km NW of Trujillo Alto, Puerto Rico
  13. 3.0 53 km N of Brenas, Puerto Rico
  14. 3.2 53 km N of Tierras Nuevas Poniente, Puerto Rico
  15. 3.0 3 km S of Palomas, 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 1,700 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.