QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

4 km SE of Esperanza, Puerto Rico

· 20 km deep · released about 420 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Vieques Municipio 7 kmCeiba Municipio 28 kmCulebra Municipio 33 kmNaguabo Municipio 35 kmHumacao Municipio 37 kmFajardo Municipio 39 kmYabucoa Municipio 44 kmLuquillo Municipio 44 kmLas Piedras Municipio 47 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
20 km below the surface
Felt
14 reports · strongest reported intensity V
Nearest
Vieques Municipio, 7 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 418 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 14 people have reported feeling it to USGS.

How big was it?

This earthquake released about 420 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 36,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 26,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.3× the energy of this one
  4. This earthquake M 2.8 about 420 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 18.0628, -65.4448. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Vieques Municipio, PR 7 km (4 mi) S of here earthquakes near Vieques Municipio
Ceiba Municipio, PR 28 km (18 mi) SE of here earthquakes near Ceiba Municipio
Culebra Municipio, PR 33 km (20 mi) SSW of here earthquakes near Culebra Municipio
Naguabo Municipio, PR 35 km (22 mi) ESE of here earthquakes near Naguabo Municipio
Humacao Municipio, PR 37 km (23 mi) ESE of here earthquakes near Humacao Municipio
Fajardo Municipio, PR 39 km (24 mi) SSE of here earthquakes near Fajardo Municipio

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

Aftershocks so far

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

  1. 2.1 5 km SSE of Bajandas, Puerto Rico
  2. 2.5 14 km N of Isabel Segunda, Puerto Rico
  3. 3.0 6 km SE of Isabel Segunda, Puerto Rico
  4. 2.6 14 km SE of Esperanza, Puerto Rico
  5. 2.4 7 km WNW of Esperanza, Puerto Rico
  6. 2.7 28 km SSW of Esperanza, Puerto Rico
  7. 3.0 14 km SE of Isabel Segunda, Puerto Rico
  8. 2.6 15 km WSW of Esperanza, Puerto Rico
  9. 2.5 19 km S of Esperanza, Puerto Rico
  10. 2.5 11 km S of Esperanza, Puerto Rico
  11. 2.7 21 km SSE of Emajagua, Puerto Rico
  12. 3.2 35 km SE of Esperanza, Puerto Rico
  13. 2.1 8 km SE of Emajagua, Puerto Rico
  14. 2.9 17 km SW of Esperanza, Puerto Rico
  15. 2.9 28 km SE of El Negro, 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 2021-10-08 — it released about 1,100 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.