QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

2 km ESE of Humacao, Puerto Rico

· 9.0 km deep · released about 91 lb of TNT

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10 km30 km60 km120 km N Humacao Municipio 2 kmLas Piedras Municipio 8 kmNaguabo Municipio 11 kmYabucoa Municipio 11 kmJuncos Municipio 14 kmSan Lorenzo Municipio 18 kmMaunabo Municipio 18 kmCanóvanas Municipio 23 kmCeiba Municipio 23 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 2.3 (md)
Depth
9.0 km below the surface
Felt
no reports yet
Nearest
Humacao Municipio, 2 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3120 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 91 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 170,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 120,000× the energy of this one
  3. Around the size people start to feel M 3.0 10× the energy of this one
  4. This earthquake M 2.3 about 91 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 18.1421, -65.8065. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Humacao Municipio, PR 2 km (1 mi) WNW of here earthquakes near Humacao Municipio
Las Piedras Municipio, PR 8 km (5 mi) SE of here earthquakes near Las Piedras Municipio
Naguabo Municipio, PR 11 km (7 mi) SW of here earthquakes near Naguabo Municipio
Yabucoa Municipio, PR 11 km (7 mi) NNE of here earthquakes near Yabucoa Municipio
Juncos Municipio, PR 14 km (9 mi) SE of here earthquakes near Juncos Municipio
San Lorenzo Municipio, PR 18 km (11 mi) E 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

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

  1. 3.1 1 km SSW of Santa Barbara, Puerto Rico
  2. 2.2 7 km SE of Arroyo, Puerto Rico
  3. 2.1 7 km SE of Arroyo, Puerto Rico
  4. 1.8 5 km S of Palmas, Puerto Rico
  5. 2.9 3 km N of Palomas, Puerto Rico
  6. 2.7 6 km SE of Arroyo, Puerto Rico
  7. 1.8 6 km SSW of Lamboglia, Puerto Rico
  8. 2.4 5 km SE of Arroyo, Puerto Rico
  9. 1.7 5 km SSW of Lamboglia, Puerto Rico
  10. 2.2 2 km E of Arroyo, Puerto Rico
  11. 2.2 5 km SSW of Lamboglia, Puerto Rico
  12. 2.1 4 km ESE of Arroyo, Puerto Rico
  13. 1.8 2 km S of Palmas, Puerto Rico
  14. 1.6 4 km SSE of Palmas, Puerto Rico
  15. 2.0 4 km S of Palmas, 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 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.