QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7Md

1 km E of Bajandas, Puerto Rico

· 47 km deep · released about 11 lb of TNT

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10 km30 km60 km120 km N Humacao Municipio 3 kmNaguabo Municipio 7 kmLas Piedras Municipio 12 kmYabucoa Municipio 15 kmJuncos Municipio 17 kmCeiba Municipio 19 kmSan Lorenzo Municipio 22 kmMaunabo Municipio 22 kmCanóvanas 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 1.7 (Md)
Depth
47 km below the surface
Felt
no reports yet
Nearest
Humacao Municipio, 3 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3607 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 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 89× the energy of this one
  4. This earthquake M 1.7 about 11 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 18.1573, -65.7666. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Humacao Municipio, PR 3 km (2 mi) NE of here earthquakes near Humacao Municipio
Naguabo Municipio, PR 7 km (4 mi) SSW of here earthquakes near Naguabo Municipio
Las Piedras Municipio, PR 12 km (7 mi) ESE of here earthquakes near Las Piedras Municipio
Yabucoa Municipio, PR 15 km (9 mi) NE of here earthquakes near Yabucoa Municipio
Juncos Municipio, PR 17 km (10 mi) ESE of here earthquakes near Juncos Municipio
Ceiba Municipio, PR 19 km (12 mi) SW of here earthquakes near Ceiba Municipio

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

Aftershocks so far

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

  1. 2.0 15 km SE of Punta Santiago, Puerto Rico
  2. 2.4 27 km SE of El Negro, Puerto Rico
  3. 2.1 14 km SE of Esperanza, Puerto Rico
  4. 2.5 30 km SSW of Esperanza, Puerto Rico
  5. 3.0 28 km SE of El Negro, Puerto Rico
  6. 1.7 29 km SE of El Negro, Puerto Rico
  7. 2.7 10 km S of Emajagua, Puerto Rico
  8. 1.9 27 km SE of El Negro, Puerto Rico
  9. 2.2 28 km SE of El Negro, Puerto Rico
  10. 1.7 21 km ESE of El Negro, Puerto Rico
  11. 1.8 6 km ESE of Comunas, Puerto Rico
  12. 1.5 2 km SE of Punta Santiago, Puerto Rico
  13. 2.0 3 km NE of Benitez, Puerto Rico
  14. 2.4 Puerto Rico region
  15. 2.3 17 km SSE of Esperanza, 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 4.3 on 2016-09-02 — it released about 7,900 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.