QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

1 km SSE of Santa Isabel, Puerto Rico

· 13 km deep · released about 44 lb of TNT

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10 km30 km60 km120 km N Santa Isabel Municipio 2 kmJuana Díaz Municipio 10 kmSalinas Municipio 15 kmCoamo Municipio 17 kmVillalba Municipio 21 kmPonce Municipio 22 kmAibonito Municipio 24 kmGuayama Municipio 28 kmBarranquitas 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 2.1 (md)
Depth
13 km below the surface
Felt
no reports yet
Nearest
Santa Isabel Municipio, 2 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 265 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 44 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 340,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 240,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 44 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 17.9558, -66.4027. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Santa Isabel Municipio, PR 2 km (1 mi) WNW of here earthquakes near Santa Isabel Municipio
Juana Díaz Municipio, PR 10 km (6 mi) ESE of here earthquakes near Juana Díaz Municipio
Salinas Municipio, PR 15 km (9 mi) W of here earthquakes near Salinas Municipio
Coamo Municipio, PR 17 km (11 mi) SSW of here earthquakes near Coamo Municipio
Villalba Municipio, PR 21 km (13 mi) SSE of here earthquakes near Villalba Municipio
Ponce Municipio, PR 22 km (14 mi) ESE of here earthquakes near Ponce Municipio

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

Aftershocks so far

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

  1. 2.9 2 km SE of Adjuntas, Puerto Rico
  2. 2.1 4 km SSW of Indios, Puerto Rico
  3. 2.7 5 km WSW of Central Aguirre, Puerto Rico
  4. 2.1 5 km WSW of Central Aguirre, Puerto Rico
  5. 2.2 1 km S of Indios, Puerto Rico
  6. 2.2 4 km SSE of Maria Antonia, Puerto Rico
  7. 2.3 2 km S of G. L. Garcia, Puerto Rico
  8. 2.2 11 km SSE of Maria Antonia, Puerto Rico
  9. 2.3 3 km ESE of Maria Antonia, Puerto Rico
  10. 2.1 4 km SE of Maria Antonia, Puerto Rico
  11. 2.0 2 km WSW of Indios, Puerto Rico
  12. 2.1 3 km WNW of Guayanilla, Puerto Rico
  13. 2.0 2 km SW of Indios, Puerto Rico
  14. 2.5 12 km SSE of Maria Antonia, Puerto Rico
  15. 1.9 2 km SSW of Indios, 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 6.4 on 2020-01-07 — it released about 2,700,000 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.