QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

72 km NW of Rincón, Puerto Rico

· 8.2 km deep · released about 1.4 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Aguadilla Municipio 71 kmRincón Municipio 72 kmAguada Municipio 74 kmIsabela Municipio 83 kmMoca Municipio 83 kmMayagüez Municipio 83 kmAñasco Municipio 85 kmQuebradillas Municipio 92 kmSan Sebastián Municipio 95 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 3.3 (md)
Depth
8.2 km below the surface
Felt
no reports yet
Nearest
Aguadilla Municipio, 71 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 853 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 1.4 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 120,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 5,200× the energy of this one
  3. Magna, Utah 2020 M 5.7 3,700× the energy of this one
  4. This earthquake M 3.3 about 1.4 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 3× more

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 18.8168, -67.7143. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Aguadilla Municipio, PR 71 km (44 mi) WNW of here earthquakes near Aguadilla Municipio
Rincón Municipio, PR 72 km (45 mi) NW of here earthquakes near Rincón Municipio
Aguada Municipio, PR 74 km (46 mi) NW of here earthquakes near Aguada Municipio
Isabela Municipio, PR 83 km (51 mi) WNW of here earthquakes near Isabela Municipio
Moca Municipio, PR 83 km (51 mi) NW of here earthquakes near Moca Municipio
Mayagüez Municipio, PR 83 km (52 mi) NNE of here earthquakes near Mayagüez Municipio

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

Aftershocks so far

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

  1. 2.8 28 km NW of San Antonio, Puerto Rico
  2. 3.2 55 km NW of San Antonio, Puerto Rico
  3. 2.9 67 km ENE of Punta Cana, Dominican Republic
  4. 3.1 83 km NW of San Antonio, Puerto Rico
  5. 3.1 56 km NE of Punta Cana, Dominican Republic
  6. 3.4 52 km NNW of San Antonio, Puerto Rico
  7. 3.4 56 km NNW of San Antonio, Puerto Rico
  8. 3.3 48 km NNW of San Antonio, Puerto Rico
  9. 3.4 48 km NW of San Antonio, Puerto Rico
  10. 3.2 51 km NW of San Antonio, Puerto Rico
  11. 3.4 61 km NW of San Antonio, Puerto Rico
  12. 3.4 55 km NE of Punta Cana, Dominican Republic
  13. 3.4 48 km NNW of San Antonio, Puerto Rico
  14. 3.2 46 km NW of San Antonio, Puerto Rico
  15. 2.9 35 km NW of San Antonio, 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 2020-01-29 — it released about 83 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.