QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

10 km ESE of Punta Santiago, Puerto Rico

· 20 km deep · released about 22 lb of TNT

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10 km30 km60 km120 km N Naguabo Municipio 13 kmHumacao Municipio 14 kmCeiba Municipio 15 kmYabucoa Municipio 23 kmVieques Municipio 24 kmLas Piedras Municipio 24 kmLuquillo Municipio 28 kmJuncos Municipio 29 kmMaunabo 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 1.9 (md)
Depth
20 km below the surface
Felt
no reports yet
Nearest
Naguabo Municipio, 13 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3420 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 22 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 680,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 480,000× the energy of this one
  3. Around the size people start to feel M 3.0 43× the energy of this one
  4. This earthquake M 1.9 about 22 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 18.1240, -65.6550. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Naguabo Municipio, PR 13 km (8 mi) SE of here earthquakes near Naguabo Municipio
Humacao Municipio, PR 14 km (9 mi) E of here earthquakes near Humacao Municipio
Ceiba Municipio, PR 15 km (9 mi) SSW of here earthquakes near Ceiba Municipio
Yabucoa Municipio, PR 23 km (14 mi) ENE of here earthquakes near Yabucoa Municipio
Vieques Municipio, PR 24 km (15 mi) W of here earthquakes near Vieques Municipio
Las Piedras Municipio, PR 24 km (15 mi) ESE 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

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

  1. 2.4 11 km S of Emajagua, Puerto Rico
  2. 2.3 13 km SSE of Esperanza, Puerto Rico
  3. 2.3 29 km SE of El Negro, Puerto Rico
  4. 2.5 28 km SE of El Negro, Puerto Rico
  5. 2.3 28 km SW of Esperanza, Puerto Rico
  6. 2.2 9 km S of Emajagua, Puerto Rico
  7. 2.8 30 km SE of El Negro, Puerto Rico
  8. 2.9 7 km NNW of Martorell, Puerto Rico
  9. 2.2 6 km SSE of Emajagua, Puerto Rico
  10. 2.0 14 km SSE of Esperanza, Puerto Rico
  11. 1.8 10 km ESE of Aguas Claras, Puerto Rico
  12. 2.0 0 km SE of Comunas, Puerto Rico
  13. 2.7 9 km S of Emajagua, Puerto Rico
  14. 2.3 26 km SE of El Negro, Puerto Rico
  15. 2.2 25 km SE 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 11,000 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.