QuakeIndex

Earthquake · reviewed by a seismologist

M 6.4mw

4 km SSE of Indios, Puerto Rico

· 6.0 km deep · released about 60 kilotons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guayanilla Municipio 5 kmPeñuelas Municipio 12 kmGuánica Municipio 12 kmYauco Municipio 15 kmSabana Grande Municipio 20 kmPonce Municipio 22 kmLajas Municipio 24 kmAdjuntas Municipio 26 kmMaricao Municipio 27 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 6.4 (mw)
Depth
6.0 km below the surface
Felt
1615 reports · strongest reported intensity VIII
Measured shaking
intensity VIII (ShakeMap)
USGS impact alert
orange
Tsunami
USGS flagged this event for tsunami evaluation. Follow tsunami.gov for official messages.
Nearest
Guayanilla Municipio, 5 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 280 days ago

This was a strong earthquake. Damage is likely near the epicentre and it is felt over a wide area. 1615 people have reported feeling it to USGS.

How big was it?

This earthquake released about 60 kilotons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 7.4 would have released about 32 times as much.

  1. Ridgecrest, California 2019 M 7.1 11× the energy of this one
  2. Loma Prieta, California 1989 M 6.9 5.6× the energy of this one
  3. Northridge, California 1994 M 6.7 2.8× the energy of this one
  4. This earthquake M 6.4 about 60 kilotons of TNT
  5. Mineral, Virginia 2011 M 5.8 this one released 7.9× more
  6. Magna, Utah 2020 M 5.7 this one released 11× 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 17.9578, -66.8113. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guayanilla Municipio, PR 5 km (3 mi) SSW of here earthquakes near Guayanilla Municipio
Peñuelas Municipio, PR 12 km (7 mi) SW of here earthquakes near Peñuelas Municipio
Guánica Municipio, PR 12 km (7 mi) E of here earthquakes near Guánica Municipio
Yauco Municipio, PR 15 km (9 mi) SSE of here earthquakes near Yauco Municipio
Sabana Grande Municipio, PR 20 km (13 mi) SE of here earthquakes near Sabana Grande Municipio
Ponce Municipio, PR 22 km (14 mi) WSW of here earthquakes near Ponce 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. 4.1 7 km S of Tallaboa, Puerto Rico
  2. 2.6 6 km SSW of Tallaboa, Puerto Rico
  3. 2.3 2 km SE of Magas Arriba, Puerto Rico
  4. 3.4 Puerto Rico region
  5. 2.9 13 km SSE of Maria Antonia, Puerto Rico
  6. 3.3 4 km SSW of Tallaboa, Puerto Rico
  7. 1.9 3 km SSE of Indios, Puerto Rico
  8. 1.8 10 km SSE of Maria Antonia, Puerto Rico
  9. 2.6 6 km SE of Indios, Puerto Rico
  10. 2.3 5 km SW of Tallaboa, Puerto Rico
  11. 2.4 2 km SE of Yauco, Puerto Rico
  12. 2.0 5 km SSE of Indios, Puerto Rico
  13. 2.8 2 km SSW of Indios, Puerto Rico
  14. 2.3 8 km S of Indios, Puerto Rico
  15. 4.7 9 km SSE of Tallaboa, 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 5.8 on 2020-01-06.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.