QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

12 km SSE of Punta Santiago, Puerto Rico

· 58 km deep · released about 460 lb of TNT

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10 km30 km60 km120 km N Humacao Municipio 12 kmYabucoa Municipio 17 kmNaguabo Municipio 17 kmMaunabo Municipio 22 kmCeiba Municipio 23 kmLas Piedras Municipio 23 kmJuncos Municipio 29 kmVieques Municipio 29 kmSan Lorenzo Municipio 31 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 2.8 (md)
Depth
58 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Humacao Municipio, 12 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2602 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 460 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 33,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 23,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.1× the energy of this one
  4. This earthquake M 2.8 about 460 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 18.0616, -65.6996. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Humacao Municipio, PR 12 km (8 mi) SE of here earthquakes near Humacao Municipio
Yabucoa Municipio, PR 17 km (11 mi) E of here earthquakes near Yabucoa Municipio
Naguabo Municipio, PR 17 km (11 mi) SSE of here earthquakes near Naguabo Municipio
Maunabo Municipio, PR 22 km (14 mi) ENE of here earthquakes near Maunabo Municipio
Ceiba Municipio, PR 23 km (14 mi) SSW of here earthquakes near Ceiba Municipio
Las Piedras Municipio, PR 23 km (14 mi) SE 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

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

  1. 2.0 22 km ESE of El Negro, Puerto Rico
  2. 1.7 15 km E of Luis M. Cintron, Puerto Rico
  3. 1.7 7 km NE of Luis M. Cintron, Puerto Rico
  4. 2.2 9 km SSE of Daguao, Puerto Rico
  5. 2.3 2 km W of Bayamon, Puerto Rico
  6. 2.1 36 km SSE of Esperanza, Puerto Rico
  7. 2.1 43 km SE of Emajagua, Puerto Rico
  8. 2.4 21 km S of Lamboglia, Puerto Rico
  9. 1.5 11 km SSW of Emajagua, Puerto Rico
  10. 2.3 22 km SE of Esperanza, Puerto Rico
  11. 2.7 10 km S of Emajagua, Puerto Rico
  12. 2.0 6 km S of Caguas, Puerto Rico
  13. 1.8 2 km WNW of Humacao, Puerto Rico
  14. 1.9 7 km SSW of Arroyo, Puerto Rico
  15. 2.0 21 km ESE of El Negro, 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 520 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.