QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4md

8 km S of Orocovis, Puerto Rico

· 5.0 km deep · released about 1.8 tons of TNT

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10 km30 km60 km120 km N Coamo Municipio 6 kmVillalba Municipio 8 kmOrocovis Municipio 9 kmBarranquitas Municipio 11 kmAibonito Municipio 14 kmCorozal Municipio 19 kmMorovis Municipio 19 kmJuana Díaz Municipio 20 kmComerío Municipio 20 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
5.0 km below the surface
Felt
4 reports · strongest reported intensity IV
Nearest
Coamo Municipio, 6 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1023 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 4 people have reported feeling it to USGS.

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 95,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 4,300× the energy of this one
  3. Magna, Utah 2020 M 5.7 3,000× 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 3.7× 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 18.1496, -66.3948. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Coamo Municipio, PR 6 km (4 mi) NW of here earthquakes near Coamo Municipio
Villalba Municipio, PR 8 km (5 mi) ENE of here earthquakes near Villalba Municipio
Orocovis Municipio, PR 9 km (6 mi) SSE of here earthquakes near Orocovis Municipio
Barranquitas Municipio, PR 11 km (7 mi) WSW of here earthquakes near Barranquitas Municipio
Aibonito Municipio, PR 14 km (9 mi) W of here earthquakes near Aibonito Municipio
Corozal Municipio, PR 19 km (12 mi) SSW of here earthquakes near Corozal Municipio

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

Aftershocks so far

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

  1. 2.2 Puerto Rico region
  2. 2.6 0 km NE of Yauco, Puerto Rico
  3. 2.5 2 km S of Magas Arriba, Puerto Rico
  4. 2.2 4 km WSW of Tallaboa, Puerto Rico
  5. 2.0 Puerto Rico region
  6. 2.7 Puerto Rico region
  7. 2.1 Puerto Rico region
  8. 3.3 4 km SSE of Salinas, Puerto Rico
  9. 3.2 Puerto Rico region

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 34,000 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.