QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

23 km ESE of El Negro, Puerto Rico

· 2.0 km deep · released about 350 lb of TNT

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10 km30 km60 km120 km N Yabucoa Municipio 25 kmMaunabo Municipio 26 kmHumacao Municipio 26 kmNaguabo Municipio 32 kmVieques Municipio 32 kmPatillas Municipio 35 kmCeiba Municipio 36 kmLas Piedras Municipio 36 kmArroyo Municipio 41 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
2.0 km below the surface
Felt
no reports yet
Nearest
Yabucoa Municipio, 25 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2705 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 350 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 43,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 31,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.7× the energy of this one
  4. This earthquake M 2.7 about 350 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 17.9335, -65.6611. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Yabucoa Municipio, PR 25 km (16 mi) ESE of here earthquakes near Yabucoa Municipio
Maunabo Municipio, PR 26 km (16 mi) ESE of here earthquakes near Maunabo Municipio
Humacao Municipio, PR 26 km (16 mi) SSE of here earthquakes near Humacao Municipio
Naguabo Municipio, PR 32 km (20 mi) SSE of here earthquakes near Naguabo Municipio
Vieques Municipio, PR 32 km (20 mi) SW of here earthquakes near Vieques Municipio
Patillas Municipio, PR 35 km (22 mi) ESE of here earthquakes near Patillas Municipio

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

Aftershocks so far

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

  1. 1.5 11 km SSW of Emajagua, Puerto Rico
  2. 2.3 22 km SE of Esperanza, Puerto Rico
  3. 2.7 10 km S of Emajagua, Puerto Rico
  4. 2.0 6 km S of Caguas, Puerto Rico
  5. 1.8 2 km WNW of Humacao, Puerto Rico
  6. 1.9 7 km SSW of Arroyo, Puerto Rico
  7. 2.0 21 km ESE of El Negro, Puerto Rico
  8. 2.3 13 km S of Esperanza, Puerto Rico
  9. 1.8 7 km SSW of Arroyo, Puerto Rico
  10. 1.5 6 km SSW of Arroyo, Puerto Rico
  11. 1.6 6 km SSW of Arroyo, Puerto Rico
  12. 2.5 7 km SSW of Arroyo, Puerto Rico
  13. 2.2 16 km S of Lamboglia, Puerto Rico
  14. 1.9 17 km S of Esperanza, Puerto Rico
  15. 2.6 11 km SE of Isabel Segunda, 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 2016-12-05 — it released about 680 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.