QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

73 km SSE of Emajagua, Puerto Rico

· 22 km deep · released about 650 lb of TNT

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10 km30 km60 km120 km N Maunabo Municipio 75 kmYabucoa Municipio 79 kmPatillas Municipio 80 kmVieques Municipio 80 kmArroyo Municipio 81 kmHumacao Municipio 84 kmGuayama Municipio 88 kmNaguabo Municipio 91 kmLas Piedras Municipio 93 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 2.9 (md)
Depth
22 km below the surface
Felt
no reports yet
Nearest
Maunabo Municipio, 75 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2937 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 650 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 23,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.5× the energy of this one
  4. This earthquake M 2.9 about 650 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 17.4115, -65.5550. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Maunabo Municipio, PR 75 km (46 mi) SSE of here earthquakes near Maunabo Municipio
Yabucoa Municipio, PR 79 km (49 mi) SSE of here earthquakes near Yabucoa Municipio
Patillas Municipio, PR 80 km (50 mi) SE of here earthquakes near Patillas Municipio
Vieques Municipio, PR 80 km (50 mi) S of here earthquakes near Vieques Municipio
Arroyo Municipio, PR 81 km (50 mi) SE of here earthquakes near Arroyo Municipio
Humacao Municipio, PR 84 km (52 mi) SSE of here earthquakes near Humacao Municipio

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

Aftershocks so far

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

  1. 2.9 33 km SE of Emajagua, Puerto Rico
  2. 3.1 27 km SE of Emajagua, Puerto Rico
  3. 2.5 34 km SSE of Emajagua, Puerto Rico
  4. 2.8 25 km SE of Emajagua, Puerto Rico
  5. 2.9 62 km SSE of Emajagua, Puerto Rico
  6. 3.0 29 km S of Esperanza, Puerto Rico
  7. 2.6 70 km SSE of Emajagua, Puerto Rico
  8. 2.6 65 km S of Arroyo, Puerto Rico
  9. 2.8 29 km SSE of Esperanza, Puerto Rico
  10. 1.8 28 km SE of Emajagua, Puerto Rico
  11. 1.8 27 km SE of Emajagua, Puerto Rico
  12. 1.8 33 km SSE of Emajagua, Puerto Rico
  13. 2.7 31 km SSW of Esperanza, Puerto Rico
  14. 2.1 36 km SSE of Esperanza, Puerto Rico
  15. 2.1 43 km SE of Emajagua, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.