QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4md

68 km SSE of Lamboglia, Puerto Rico

Yes. A magnitude 2.4 earthquake was recorded 68 km SSE of Lamboglia, Puerto Rico, at 12:27 am AST on 25 August 2019 (04:27 UTC), 12 km deep.

· 12 km deep · released about 100 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Maunabo Municipio 69 kmArroyo Municipio 69 kmPatillas Municipio 70 kmGuayama Municipio 73 kmYabucoa Municipio 75 kmSalinas Municipio 79 kmHumacao Municipio 84 kmSanta Isabel Municipio 86 kmSan Lorenzo Municipio 86 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 2.4 (md)
Depth
12 km below the surface
Felt
no reports yet
Nearest
Maunabo Municipio, 69 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2636 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth, people at rest would likely notice it out to about 17 km (11 mi) from the epicentre. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

How big was it?

This earthquake released about 100 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 140,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 100,000× the energy of this one
  3. Around the size people start to feel M 3.0 9.1× the energy of this one
  4. This earthquake M 2.4 about 100 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.

For this area

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:

  1. 5.3 68 km SSE of Emajagua, Puerto Rico · 13 km E of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 17.3823, -65.8390. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Maunabo Municipio, PR 69 km (43 mi) N earthquakes near Maunabo Municipio
Arroyo Municipio, PR 69 km (43 mi) NNW earthquakes near Arroyo Municipio
Patillas Municipio, PR 70 km (44 mi) NNW earthquakes near Patillas Municipio
Guayama Municipio, PR 73 km (45 mi) NNW earthquakes near Guayama Municipio
Yabucoa Municipio, PR 75 km (47 mi) N earthquakes near Yabucoa Municipio
Salinas Municipio, PR 79 km (49 mi) NW earthquakes near Salinas Municipio

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

Aftershocks so far

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

  1. 2.1 24 km S of Lamboglia, Puerto Rico
  2. 2.9 26 km SSE of Arroyo, Puerto Rico
  3. 3.2 21 km SSE of Lamboglia, Puerto Rico
  4. 3.2 36 km SE of Emajagua, Puerto Rico
  5. 2.4 23 km SSE of Arroyo, Puerto Rico
  6. 2.1 20 km SSE of Arroyo, Puerto Rico
  7. 3.1 34 km S of Lamboglia, Puerto Rico
  8. 3.3 27 km SSE of Jobos, Puerto Rico
  9. 2.5 23 km S of Arroyo, Puerto Rico
  10. 3.0 54 km S of Emajagua, Puerto Rico
  11. 2.4 23 km S of Arroyo, Puerto Rico
  12. 3.5 72 km SSE of Emajagua, Puerto Rico
  13. 3.0 54 km SE of Emajagua, Puerto Rico
  14. 2.6 40 km S of Central Aguirre, Puerto Rico
  15. 3.1 21 km SSE of Lamboglia, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.