QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

74 km SSW of Pole Ojea, Puerto Rico

· 16 km deep · released about 15 lb of TNT

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10 km30 km60 km120 km N Cabo Rojo Municipio 77 kmLajas Municipio 82 kmGuánica Municipio 88 kmMayagüez Municipio 90 kmHormigueros Municipio 94 kmSan Germán Municipio 95 kmSabana Grande Municipio 98 kmGuayanilla Municipio 101 kmYauco Municipio 104 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
16 km below the surface
Felt
no reports yet
Nearest
Cabo Rojo Municipio, 77 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2508 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 15 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 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× the energy of this one
  4. This earthquake M 1.8 about 15 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 17.3701, -67.4845. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cabo Rojo Municipio, PR 77 km (48 mi) SSW of here earthquakes near Cabo Rojo Municipio
Lajas Municipio, PR 82 km (51 mi) SW of here earthquakes near Lajas Municipio
Guánica Municipio, PR 88 km (54 mi) SW of here earthquakes near Guánica Municipio
Mayagüez Municipio, PR 90 km (56 mi) SSE of here earthquakes near Mayagüez Municipio
Hormigueros Municipio, PR 94 km (58 mi) SSW of here earthquakes near Hormigueros Municipio
San Germán Municipio, PR 95 km (59 mi) SSW of here earthquakes near San Germán Municipio

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

Aftershocks so far

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

  1. 3.6 106 km SW of Pole Ojea, Puerto Rico
  2. 3.5 78 km SW of Pole Ojea, Puerto Rico
  3. 2.9 85 km SW of Pole Ojea, Puerto Rico
  4. 3.1 86 km SW of Pole Ojea, Puerto Rico
  5. 3.1 87 km SW of Pole Ojea, Puerto Rico
  6. 3.0 85 km SW of Pole Ojea, Puerto Rico
  7. 3.4 96 km SW of Pole Ojea, Puerto Rico
  8. 3.3 94 km SW of Pole Ojea, Puerto Rico
  9. 3.2 61 km WSW of Pole Ojea, Puerto Rico
  10. 3.1 102 km SW of Pole Ojea, Puerto Rico
  11. 3.0 39 km S of Pole Ojea, Puerto Rico
  12. 3.4 100 km SSW of Pole Ojea, Puerto Rico
  13. 2.6 29 km SW of Pole Ojea, Puerto Rico
  14. 3.4 43 km SW of Pole Ojea, Puerto Rico
  15. 3.2 46 km SW of Pole Ojea, 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.