QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3Md

6 km S of Punta Santiago, Puerto Rico

· 6.0 km deep · released about 85 lb of TNT

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10 km30 km60 km120 km N Humacao Municipio 6 kmNaguabo Municipio 11 kmYabucoa Municipio 14 kmLas Piedras Municipio 16 kmCeiba Municipio 20 kmMaunabo Municipio 21 kmJuncos Municipio 22 kmSan Lorenzo Municipio 26 kmLuquillo Municipio 29 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
6.0 km below the surface
Felt
no reports yet
Nearest
Humacao Municipio, 6 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3578 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 85 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 5.8 180,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 130,000× the energy of this one
  3. Around the size people start to feel M 3.0 11× the energy of this one
  4. This earthquake M 2.3 about 85 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 18.1105, -65.7378. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Humacao Municipio, PR 6 km (4 mi) ESE of here earthquakes near Humacao Municipio
Naguabo Municipio, PR 11 km (7 mi) S of here earthquakes near Naguabo Municipio
Yabucoa Municipio, PR 14 km (9 mi) ENE of here earthquakes near Yabucoa Municipio
Las Piedras Municipio, PR 16 km (10 mi) ESE of here earthquakes near Las Piedras Municipio
Ceiba Municipio, PR 20 km (13 mi) SW of here earthquakes near Ceiba Municipio
Maunabo Municipio, PR 21 km (13 mi) NE of here earthquakes near Maunabo Municipio

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

Aftershocks so far

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

  1. 2.3 30 km SE of Emajagua, Puerto Rico
  2. 2.4 3 km WSW of Gurabo, Puerto Rico
  3. 3.2 17 km WNW of Culebra, Puerto Rico
  4. 2.7 12 km S of Emajagua, Puerto Rico
  5. 1.6 27 km SE of El Negro, Puerto Rico
  6. 1.8 30 km SSW of Esperanza, Puerto Rico
  7. 1.9 29 km SE of El Negro, Puerto Rico
  8. 3.5 27 km SW of Esperanza, Puerto Rico
  9. 1.8 15 km WSW of Esperanza, Puerto Rico
  10. 2.9 1 km E of La Plena, Puerto Rico
  11. 2.2 19 km WSW of Esperanza, Puerto Rico
  12. 2.5 9 km S of Emajagua, Puerto Rico
  13. 2.1 2 km SW of Canovanas, Puerto Rico
  14. 2.2 1 km ESE of Cidra, Puerto Rico
  15. 2.3 14 km W of Esperanza, 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 2,800 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.