QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

9 km SE of Emajagua, Puerto Rico

· 8.2 km deep · released about 180 lb of TNT

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10 km30 km60 km120 km N Maunabo Municipio 10 kmYabucoa Municipio 14 kmPatillas Municipio 19 kmHumacao Municipio 22 kmArroyo Municipio 24 kmLas Piedras Municipio 28 kmSan Lorenzo Municipio 28 kmNaguabo Municipio 31 kmJuncos Municipio 33 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 2.5 (md)
Depth
8.2 km below the surface
Felt
no reports yet
Nearest
Maunabo Municipio, 10 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 563 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 180 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 83,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 59,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.2× the energy of this one
  4. This earthquake M 2.5 about 180 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 17.9407, -65.8205. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Maunabo Municipio, PR 10 km (6 mi) SE of here earthquakes near Maunabo Municipio
Yabucoa Municipio, PR 14 km (9 mi) SSE of here earthquakes near Yabucoa Municipio
Patillas Municipio, PR 19 km (12 mi) ESE of here earthquakes near Patillas Municipio
Humacao Municipio, PR 22 km (14 mi) S of here earthquakes near Humacao Municipio
Arroyo Municipio, PR 24 km (15 mi) E of here earthquakes near Arroyo Municipio
Las Piedras Municipio, PR 28 km (17 mi) S of here earthquakes near Las Piedras Municipio

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

Aftershocks so far

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

  1. 2.6 11 km SE of Esperanza, Puerto Rico
  2. 2.7 8 km ESE of Esperanza, Puerto Rico
  3. 1.8 5 km W of Rosa Sanchez, Puerto Rico
  4. 2.0 5 km WSW of Central Aguirre, Puerto Rico
  5. 1.8 4 km E of Pastos, Puerto Rico
  6. 2.8 4 km SE of Esperanza, Puerto Rico
  7. 2.0 4 km SW of Jagual, Puerto Rico
  8. 2.6 24 km SSW of Esperanza, Puerto Rico
  9. 2.1 2 km N of Santa Clara, Puerto Rico
  10. 1.9 0 km ESE of Vázquez, Puerto Rico
  11. 2.9 18 km ESE of El Negro, Puerto Rico
  12. 2.8 16 km ESE of El Negro, Puerto Rico
  13. 2.4 22 km SE of El Negro, Puerto Rico
  14. 2.7 18 km SE of El Negro, Puerto Rico
  15. 3.4 16 km SSW of Central Aguirre, 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 2,600 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.