QuakeIndex

Earthquake · reviewed by a seismologist

M 4.1ml

5 km SSE of El Negro, Puerto Rico

· 13 km deep · released about 21 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Maunabo Municipio 8 kmYabucoa Municipio 8 kmHumacao Municipio 16 kmPatillas Municipio 17 kmLas Piedras Municipio 22 kmArroyo Municipio 23 kmSan Lorenzo Municipio 23 kmNaguabo Municipio 26 kmJuncos Municipio 27 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 4.1 (ml)
Depth
13 km below the surface
Felt
350 reports · strongest reported intensity IV
Measured shaking
intensity IV (ShakeMap)
USGS impact alert
green
Nearest
Maunabo Municipio, 8 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2621 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 350 people have reported feeling it to USGS.

How big was it?

This earthquake released about 21 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 7,900× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 350× the energy of this one
  3. Magna, Utah 2020 M 5.7 250× the energy of this one
  4. This earthquake M 4.1 about 21 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 45× 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 17.9946, -65.8256. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Maunabo Municipio, PR 8 km (5 mi) E of here earthquakes near Maunabo Municipio
Yabucoa Municipio, PR 8 km (5 mi) SSE of here earthquakes near Yabucoa Municipio
Humacao Municipio, PR 16 km (10 mi) SSW of here earthquakes near Humacao Municipio
Patillas Municipio, PR 17 km (11 mi) E of here earthquakes near Patillas Municipio
Las Piedras Municipio, PR 22 km (14 mi) SSE of here earthquakes near Las Piedras Municipio
Arroyo Municipio, PR 23 km (14 mi) E of here earthquakes near Arroyo Municipio

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

Aftershocks so far

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

  1. 2.2 16 km S of Lamboglia, Puerto Rico
  2. 1.9 5 km WNW of Aguas Buenas, Puerto Rico
  3. 1.9 17 km S of Esperanza, Puerto Rico
  4. 1.9 16 km SSW of Esperanza, Puerto Rico
  5. 2.7 18 km SSE of Esperanza, Puerto Rico
  6. 1.7 18 km SSE of Punta Santiago, Puerto Rico
  7. 1.7 0 km ENE of Jobos, Puerto Rico
  8. 1.5 1 km WSW of Vázquez, Puerto Rico
  9. 2.9 10 km SSE of Esperanza, Puerto Rico
  10. 1.5 1 km ENE of Jobos, Puerto Rico
  11. 2.4 18 km S of Esperanza, Puerto Rico
  12. 2.0 21 km S of Esperanza, Puerto Rico
  13. 1.5 5 km SSW of Emajagua, Puerto Rico
  14. 2.0 3 km SSE of Salinas, Puerto Rico
  15. 2.7 3 km E of Ceiba, 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 5.6 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.