QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

118 km NNE of San Juan, Puerto Rico

· 43 km deep · released about 360 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Loíza 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 2.7 (md)
Depth
43 km below the surface
Felt
no reports yet
Nearest
Loíza Municipio, 118 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2444 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 360 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 42,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 30,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.6× the energy of this one
  4. This earthquake M 2.7 about 360 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 19.5036, -65.8348. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loíza Municipio, PR 118 km (73 mi) N of here earthquakes near Loíza Municipio
Cataño Municipio, PR 122 km (76 mi) NNE of here earthquakes near Cataño Municipio
Toa Baja Municipio, PR 122 km (76 mi) NNE of here earthquakes near Toa Baja Municipio
Dorado Municipio, PR 123 km (76 mi) NNE of here earthquakes near Dorado Municipio
Vega Alta Municipio, PR 130 km (81 mi) NNE of here earthquakes near Vega Alta Municipio
Vega Baja Municipio, PR 131 km (81 mi) NNE of here earthquakes near Vega Baja Municipio

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

Aftershocks so far

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

  1. 3.5 116 km NNE of Suárez, Puerto Rico
  2. 3.6 130 km NNE of Suárez, Puerto Rico
  3. 3.5 119 km N of San Juan, Puerto Rico
  4. 3.5 118 km N of Brenas, Puerto Rico
  5. 3.4 101 km NNE of Suárez, Puerto Rico
  6. 3.5 106 km NNE of Vieques, Puerto Rico
  7. 2.6 Puerto Rico region
  8. 3.7 128 km NNE of Vieques, Puerto Rico
  9. 3.4 120 km NNE of Vieques, Puerto Rico
  10. 2.7 124 km NNE of Vieques, Puerto Rico
  11. 3.7 124 km NNE of Vieques, Puerto Rico
  12. 3.6 114 km NNE of Vieques, Puerto Rico
  13. 3.6 109 km NNE of Vieques, Puerto Rico
  14. 3.8 136 km NNE of Vieques, Puerto Rico
  15. 3.6 129 km NNE of Vieques, 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 4.0 on 2019-06-21 — 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.