QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

4 km SSE of Utuado, Puerto Rico

· 7.0 km deep · released about 44 lb of TNT

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10 km30 km60 km120 km N Utuado Municipio 5 kmAdjuntas Municipio 10 kmJayuya Municipio 10 kmCiales Municipio 19 kmFlorida Municipio 20 kmLares Municipio 20 kmArecibo Municipio 22 kmPeñuelas Municipio 23 kmYauco Municipio 25 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
Utuado Municipio, 5 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 150 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 44 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 5.8 340,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 240,000× 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 44 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 18.2325, -66.6833. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Utuado Municipio, PR 5 km (3 mi) SSE of here earthquakes near Utuado Municipio
Adjuntas Municipio, PR 10 km (6 mi) NE of here earthquakes near Adjuntas Municipio
Jayuya Municipio, PR 10 km (7 mi) WNW of here earthquakes near Jayuya Municipio
Ciales Municipio, PR 19 km (12 mi) WSW of here earthquakes near Ciales Municipio
Florida Municipio, PR 20 km (12 mi) SW of here earthquakes near Florida Municipio
Lares Municipio, PR 20 km (13 mi) ESE of here earthquakes near Lares Municipio

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

Aftershocks so far

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

  1. 2.1 7 km WSW of Naranjito, Puerto Rico
  2. 2.6 1 km ESE of Indios, Puerto Rico
  3. 3.2 1 km ENE of Indios, Puerto Rico
  4. 2.9 1 km ENE of Sabana Grande, Puerto Rico
  5. 2.3 8 km SSE of Maria Antonia, Puerto Rico
  6. 2.3 2 km NNW of Tallaboa, Puerto Rico
  7. 2.3 2 km SSW of Peñuelas, Puerto Rico
  8. 2.3 7 km ESE of La Parguera, Puerto Rico
  9. 2.5 7 km WSW of Fuig, Puerto Rico
  10. 1.9 Puerto Rico region
  11. 2.1 0 km SSE of Guánica, Puerto Rico
  12. 2.5 5 km S of Guánica, Puerto Rico
  13. 2.1 11 km SSE of Maria Antonia, Puerto Rico
  14. 2.5 16 km N of Arecibo, Puerto Rico
  15. 2.3 5 km E 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.

For this area

The largest earthquake within 50 km in our catalogue was M 6.4 on 2020-01-07 — it released about 2,700,000 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.