QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

2 km NNW of Punta Santiago, Puerto Rico

· 14 km deep · released about 98 lb of TNT

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10 km30 km60 km120 km N Naguabo Municipio 3 kmHumacao Municipio 7 kmLas Piedras Municipio 12 kmCeiba Municipio 16 kmJuncos Municipio 16 kmYabucoa Municipio 18 kmLuquillo Municipio 21 kmCanóvanas Municipio 21 kmRío Grande Municipio 21 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
14 km below the surface
Felt
no reports yet
Nearest
Naguabo Municipio, 3 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1417 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 98 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 5.8 150,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 110,000× the energy of this one
  3. Around the size people start to feel M 3.0 9.8× the energy of this one
  4. This earthquake M 2.3 about 98 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 18.1877, -65.7577. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Naguabo Municipio, PR 3 km (2 mi) SW of here earthquakes near Naguabo Municipio
Humacao Municipio, PR 7 km (4 mi) NNE of here earthquakes near Humacao Municipio
Las Piedras Municipio, PR 12 km (7 mi) E of here earthquakes near Las Piedras Municipio
Ceiba Municipio, PR 16 km (10 mi) WSW of here earthquakes near Ceiba Municipio
Juncos Municipio, PR 16 km (10 mi) ESE of here earthquakes near Juncos Municipio
Yabucoa Municipio, PR 18 km (11 mi) NE of here earthquakes near Yabucoa Municipio

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

Aftershocks so far

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

  1. 3.1 Puerto Rico region
  2. 2.5 9 km S of Esperanza, Puerto Rico
  3. 2.5 17 km SSE of Lamboglia, Puerto Rico
  4. 2.8 1 km W of San Isidro, Puerto Rico
  5. 2.9 11 km WNW of Culebra, Puerto Rico
  6. 2.8 Puerto Rico region
  7. 3.0 18 km S of Esperanza, Puerto Rico
  8. 3.1 11 km SSW of Esperanza, Puerto Rico
  9. 3.2 22 km NNE of Luquillo, Puerto Rico
  10. 2.6 4 km SSE of Arroyo, Puerto Rico
  11. 2.5 Puerto Rico region
  12. 3.4 Puerto Rico region
  13. 3.1 3 km E of Celada, Puerto Rico
  14. 2.7 16 km SSE of Esperanza, Puerto Rico
  15. 2.5 6 km N of Yaurel, 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 4,900 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.