QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

13 km SSE of Emajagua, Puerto Rico

· 42 km deep · released about 550 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Maunabo Municipio 14 kmYabucoa Municipio 19 kmPatillas Municipio 21 kmArroyo Municipio 25 kmHumacao Municipio 27 kmSan Lorenzo Municipio 33 kmLas Piedras Municipio 33 kmGuayama Municipio 34 kmNaguabo Municipio 37 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
42 km below the surface
Felt
no reports yet
Nearest
Maunabo Municipio, 14 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 307 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 550 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 28,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 19,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.7× the energy of this one
  4. This earthquake M 2.8 about 550 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 17.8915, -65.8253. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Maunabo Municipio, PR 14 km (9 mi) SSE of here earthquakes near Maunabo Municipio
Yabucoa Municipio, PR 19 km (12 mi) S of here earthquakes near Yabucoa Municipio
Patillas Municipio, PR 21 km (13 mi) SE of here earthquakes near Patillas Municipio
Arroyo Municipio, PR 25 km (15 mi) ESE of here earthquakes near Arroyo Municipio
Humacao Municipio, PR 27 km (17 mi) S of here earthquakes near Humacao Municipio
San Lorenzo Municipio, PR 33 km (20 mi) SSE of here earthquakes near San Lorenzo Municipio

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

Aftershocks so far

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

  1. 2.2 6 km SSE of Salinas, Puerto Rico
  2. 2.5 11 km SSE of Esperanza, Puerto Rico
  3. 2.9 21 km SW of Esperanza, Puerto Rico
  4. 3.7 29 km SSW of Esperanza, Puerto Rico
  5. 2.7 3 km SE of Jobos, Puerto Rico
  6. 1.5 1 km NE of Vázquez, Puerto Rico
  7. 2.1 1 km SE of Aguas Buenas, Puerto Rico
  8. 1.6 2 km ESE of Jobos, Puerto Rico
  9. 2.1 2 km SE of Jobos, Puerto Rico
  10. 2.5 1 km W of Santa Clara, Puerto Rico
  11. 1.5 6 km S of Central Aguirre, Puerto Rico
  12. 2.6 2 km WSW of G. L. Garcia, Puerto Rico
  13. 2.0 2 km SSW of Vázquez, Puerto Rico
  14. 2.0 11 km SSE of Punta Santiago, Puerto Rico
  15. 1.9 0 km SW of G. L. Garcia, 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 870 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.