QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4md

10 km SSE of Ponce, Puerto Rico

· 4.0 km deep · released about 2 tons of TNT

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10 km30 km60 km120 km N Ponce Municipio 9 kmJuana Díaz Municipio 15 kmPeñuelas Municipio 18 kmSanta Isabel Municipio 23 kmGuayanilla Municipio 23 kmVillalba Municipio 27 kmJayuya Municipio 33 kmCoamo Municipio 33 kmYauco Municipio 33 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 3.4 (md)
Depth
4.0 km below the surface
Felt
2 reports · strongest reported intensity III
Nearest
Ponce Municipio, 9 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2248 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 2 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 86,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 3,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,700× the energy of this one
  4. This earthquake M 3.4 about 2 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 4.1× more

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 17.9166, -66.5993. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Ponce Municipio, PR 9 km (6 mi) S of here earthquakes near Ponce Municipio
Juana Díaz Municipio, PR 15 km (9 mi) SW of here earthquakes near Juana Díaz Municipio
Peñuelas Municipio, PR 18 km (11 mi) SE of here earthquakes near Peñuelas Municipio
Santa Isabel Municipio, PR 23 km (14 mi) W of here earthquakes near Santa Isabel Municipio
Guayanilla Municipio, PR 23 km (14 mi) ESE of here earthquakes near Guayanilla Municipio
Villalba Municipio, PR 27 km (17 mi) SSW of here earthquakes near Villalba Municipio

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

Aftershocks so far

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

  1. 2.6 5 km SE of Tallaboa, Puerto Rico
  2. 2.7 30 km SSE of Guánica, Puerto Rico
  3. 2.7 4 km ESE of La Parguera, Puerto Rico
  4. 3.1 4 km WSW of Guánica, Puerto Rico
  5. 2.7 3 km SSE of Guánica, Puerto Rico
  6. 3.1 4 km SE of La Parguera, Puerto Rico
  7. 2.9 7 km SSE of Maria Antonia, Puerto Rico
  8. 2.5 1 km ESE of Guánica, Puerto Rico
  9. 2.6 4 km SSW of Indios, Puerto Rico
  10. 2.4 13 km S of Indios, Puerto Rico
  11. 3.1 7 km SSE of Maria Antonia, Puerto Rico
  12. 2.9 Puerto Rico region
  13. 2.8 12 km S of Guánica, Puerto Rico
  14. 3.7 4 km SW of Tallaboa, Puerto Rico
  15. 3.0 Puerto Rico region

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 6.4 on 2020-01-07 — it released about 31,000 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.