QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

18 km WSW of Esperanza, Puerto Rico

· 6.7 km deep · released about 43 lb of TNT

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10 km30 km60 km120 km N Humacao Municipio 21 kmNaguabo Municipio 24 kmVieques Municipio 24 kmYabucoa Municipio 25 kmCeiba Municipio 26 kmMaunabo Municipio 28 kmLas Piedras Municipio 31 kmJuncos Municipio 37 kmPatillas Municipio 38 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
6.7 km below the surface
Felt
no reports yet
Nearest
Humacao Municipio, 21 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 378 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 43 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 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× 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 43 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 18.0233, -65.6295. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Humacao Municipio, PR 21 km (13 mi) SE of here earthquakes near Humacao Municipio
Naguabo Municipio, PR 24 km (15 mi) SSE of here earthquakes near Naguabo Municipio
Vieques Municipio, PR 24 km (15 mi) WSW of here earthquakes near Vieques Municipio
Yabucoa Municipio, PR 25 km (15 mi) E of here earthquakes near Yabucoa Municipio
Ceiba Municipio, PR 26 km (16 mi) S of here earthquakes near Ceiba Municipio
Maunabo Municipio, PR 28 km (18 mi) E of here earthquakes near Maunabo Municipio

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

Aftershocks so far

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

  1. 2.9 21 km SW of Esperanza, Puerto Rico
  2. 3.7 29 km SSW of Esperanza, Puerto Rico
  3. 2.0 11 km SSE of Punta Santiago, Puerto Rico
  4. 2.6 26 km SE of El Negro, Puerto Rico
  5. 3.0 30 km SSW of Esperanza, Puerto Rico
  6. 2.3 5 km W of Campo Rico, Puerto Rico
  7. 1.8 7 km ESE of G. L. Garcia, Puerto Rico
  8. 3.1 30 km SE of Emajagua, Puerto Rico
  9. 3.0 19 km WSW of Esperanza, Puerto Rico
  10. 2.0 4 km WNW of Yaurel, Puerto Rico
  11. 3.1 9 km SSE of Daguao, Puerto Rico
  12. 2.6 2 km SW of Campo Rico, Puerto Rico
  13. 1.9 4 km SE of Jagual, Puerto Rico
  14. 2.9 29 km SSW of Esperanza, Puerto Rico
  15. 1.9 3 km E of G. L. Garcia, 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 4.8 on 2021-10-08 — 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.