QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

14 km NNW of San Juan, Puerto Rico

· 96 km deep · released about 530 lb of TNT

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10 km30 km60 km120 km N Toa Baja Municipio 14 kmCataño Municipio 15 kmDorado Municipio 16 kmSan Juan Municipio 21 kmVega Alta Municipio 24 kmToa Alta Municipio 26 kmBayamón Municipio 26 kmGuaynabo Municipio 27 kmLoíza Municipio 28 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 2.8 (md)
Depth
96 km below the surface
Felt
no reports yet
Nearest
Toa Baja Municipio, 14 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2501 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 530 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 29,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 20,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.8× the energy of this one
  4. This earthquake M 2.8 about 530 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 18.5828, -66.1663. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Toa Baja Municipio, PR 14 km (9 mi) NNE of here earthquakes near Toa Baja Municipio
Cataño Municipio, PR 15 km (10 mi) N of here earthquakes near Cataño Municipio
Dorado Municipio, PR 16 km (10 mi) NE of here earthquakes near Dorado Municipio
San Juan Municipio, PR 21 km (13 mi) NNW of here earthquakes near San Juan Municipio
Vega Alta Municipio, PR 24 km (15 mi) NE of here earthquakes near Vega Alta Municipio
Toa Alta Municipio, PR 26 km (16 mi) NNE of here earthquakes near Toa Alta Municipio

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

Aftershocks so far

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

  1. 2.8 Puerto Rico region
  2. 2.9 16 km NNE of Suárez, Puerto Rico
  3. 2.6 33 km N of San Juan, Puerto Rico
  4. 2.1 1 km WNW of Vega Baja, Puerto Rico
  5. 3.1 0 km SE of San Antonio, Puerto Rico
  6. 2.4 2 km S of Guaynabo, Puerto Rico
  7. 3.3 5 km SE of Pájaros, Puerto Rico
  8. 2.3 2 km N of Jagual, Puerto Rico
  9. 3.0 54 km N of Brenas, Puerto Rico
  10. 2.3 1 km SSE of Cidra, Puerto Rico
  11. 2.0 Puerto Rico region
  12. 3.2 38 km NNW of Brenas, Puerto Rico
  13. 2.4 3 km NNW of Barranquitas, Puerto Rico
  14. 2.8 1 km ESE of Orocovis, Puerto Rico
  15. 2.7 0 km WSW of Galateo, 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 900 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.