QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

1 km NNE of El Negro, Puerto Rico

· 10 km deep · released about 38 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Yabucoa Municipio 2 kmMaunabo Municipio 8 kmHumacao Municipio 11 kmLas Piedras Municipio 15 kmPatillas Municipio 16 kmSan Lorenzo Municipio 18 kmJuncos Municipio 20 kmNaguabo Municipio 21 kmArroyo Municipio 23 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
10 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Yabucoa Municipio, 2 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2633 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 38 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 5.8 390,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 280,000× the energy of this one
  3. Around the size people start to feel M 3.0 25× the energy of this one
  4. This earthquake M 2.1 about 38 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 18.0528, -65.8436. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Yabucoa Municipio, PR 2 km (1 mi) ESE of here earthquakes near Yabucoa Municipio
Maunabo Municipio, PR 8 km (5 mi) NE of here earthquakes near Maunabo Municipio
Humacao Municipio, PR 11 km (7 mi) SSW of here earthquakes near Humacao Municipio
Las Piedras Municipio, PR 15 km (9 mi) S of here earthquakes near Las Piedras Municipio
Patillas Municipio, PR 16 km (10 mi) ENE of here earthquakes near Patillas Municipio
San Lorenzo Municipio, PR 18 km (11 mi) SE of here earthquakes near San Lorenzo Municipio

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

Aftershocks so far

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

  1. 1.9 16 km SSW of Esperanza, Puerto Rico
  2. 1.7 18 km SSE of Punta Santiago, Puerto Rico
  3. 1.7 0 km ENE of Jobos, Puerto Rico
  4. 1.5 1 km WSW of Vázquez, Puerto Rico
  5. 2.9 10 km SSE of Esperanza, Puerto Rico
  6. 1.5 1 km ENE of Jobos, Puerto Rico
  7. 2.4 18 km S of Esperanza, Puerto Rico
  8. 2.0 21 km S of Esperanza, Puerto Rico
  9. 1.5 5 km SSW of Emajagua, Puerto Rico
  10. 2.0 3 km SSE of Salinas, Puerto Rico
  11. 2.7 3 km E of Ceiba, Puerto Rico
  12. 1.5 1 km NNE of Jobos, Puerto Rico
  13. 1.7 24 km SE of Emajagua, Puerto Rico
  14. 2.5 22 km SE of Emajagua, Puerto Rico
  15. 2.0 24 km SSE of Emajagua, 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 4.6 on 2016-12-05 — it released about 6,200 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.