QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

1 km NNW of Sumidero, Puerto Rico

· 15 km deep · released about 17 lb of TNT

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10 km30 km60 km120 km N Aguas Buenas Municipio 3 kmCidra Municipio 7 kmComerío Municipio 9 kmCaguas Municipio 9 kmGuaynabo Municipio 13 kmBayamón Municipio 13 kmNaranjito Municipio 14 kmCayey Municipio 14 kmGurabo Municipio 17 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 1.8 (md)
Depth
15 km below the surface
Felt
no reports yet
Nearest
Aguas Buenas Municipio, 3 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2842 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 17 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 640,000× the energy of this one
  3. Around the size people start to feel M 3.0 57× the energy of this one
  4. This earthquake M 1.8 about 17 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 18.2325, -66.1345. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Aguas Buenas Municipio, PR 3 km (2 mi) SSW of here earthquakes near Aguas Buenas Municipio
Cidra Municipio, PR 7 km (4 mi) NNE of here earthquakes near Cidra Municipio
Comerío Municipio, PR 9 km (6 mi) E of here earthquakes near Comerío Municipio
Caguas Municipio, PR 9 km (6 mi) WNW of here earthquakes near Caguas Municipio
Guaynabo Municipio, PR 13 km (8 mi) S of here earthquakes near Guaynabo Municipio
Bayamón Municipio, PR 13 km (8 mi) SSE of here earthquakes near Bayamón Municipio

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

Aftershocks so far

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

  1. 2.7 2 km SW of H. Rivera Colon, Puerto Rico
  2. 2.0 20 km NE of San Juan, Puerto Rico
  3. 2.6 3 km N of Cidra, Puerto Rico
  4. 2.7 5 km S of Jayuya, Puerto Rico
  5. 2.5 6 km ESE of San Juan, Puerto Rico
  6. 1.7 3 km SSE of Santa Isabel, Puerto Rico
  7. 2.1 0 km SW of Toa Alta, Puerto Rico
  8. 2.9 13 km NNW of Brenas, Puerto Rico
  9. 1.9 5 km SSE of Central Aguirre, Puerto Rico
  10. 1.9 6 km WNW of Palomas, Puerto Rico
  11. 1.5 5 km SSW of Guaynabo, Puerto Rico
  12. 2.5 12 km N of Brenas, Puerto Rico
  13. 1.6 1 km SSE of Capitanejo, Puerto Rico
  14. 3.0 2 km ENE of Guaynabo, Puerto Rico
  15. 1.9 4 km E of Barranquitas, 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 14,000 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.