QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4md

103 km WSW of Pole Ojea, Puerto Rico

· 60 km deep · released about 1.8 tons of TNT

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10 km30 km60 km120 km N Mayagüez Municipio 63 kmCabo Rojo Municipio 105 kmLajas Municipio 117 kmHormigueros Municipio 118 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 3.4 (md)
Depth
60 km below the surface
Felt
no reports yet
Nearest
Mayagüez Municipio, 63 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 903 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 1.8 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 92,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 4,100× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,900× the energy of this one
  4. This earthquake M 3.4 about 1.8 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 3.8× 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 17.5425, -68.0462. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mayagüez Municipio, PR 63 km (39 mi) SSW of here earthquakes near Mayagüez Municipio
Cabo Rojo Municipio, PR 105 km (65 mi) WSW of here earthquakes near Cabo Rojo Municipio
Lajas Municipio, PR 117 km (73 mi) WSW of here earthquakes near Lajas Municipio
Hormigueros Municipio, PR 118 km (74 mi) WSW of here earthquakes near Hormigueros Municipio
Rincón Municipio, PR 122 km (76 mi) SW of here earthquakes near Rincón Municipio
San Germán Municipio, PR 124 km (77 mi) WSW of here earthquakes near San Germán Municipio

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

Aftershocks so far

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

  1. 3.4 61 km SSE of Boca de Yuma, Dominican Republic
  2. 3.9 81 km SE of Boca de Yuma, Dominican Republic
  3. 3.3 83 km SE of Boca de Yuma, Dominican Republic
  4. 4.7 106 km WSW of Pole Ojea, Puerto Rico
  5. 3.4 89 km SSE of Boca de Yuma, Dominican Republic
  6. 3.3 65 km SE of Boca de Yuma, Dominican Republic
  7. 3.3 79 km W of Pole Ojea, Puerto Rico
  8. 3.9 123 km SSE of Boca de Yuma, Dominican Republic
  9. 3.5 71 km SE of Boca de Yuma, Dominican Republic
  10. 3.4 73 km W of Pole Ojea, Puerto Rico
  11. 3.4 83 km W of Pole Ojea, Puerto Rico
  12. 2.9 61 km SW of Pole Ojea, Puerto Rico
  13. 3.4 74 km SE of Boca de Yuma, Dominican Republic
  14. 3.5 69 km SE of Boca de Yuma, Dominican Republic
  15. 3.5 94 km SW of Pole Ojea, 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 4.3 on 2017-07-18 — it released about 23 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.