Earthquake · reviewed by a seismologist
M 1.7md
Earthquake near Guánica, PR
Yes: an earthquake was likely felt in Guánica in the last 24 hours. M 2.1, 7 km (4 mi) ENE of Guánica, at 4:14 pm AST on 11 November 2026 (20:14 UTC); the estimated shaking in Guánica was intensity II (weak). Every earthquake near Guánica
This page: a magnitude 1.7 earthquake was recorded 9 km (6 mi) south of Guánica, PR, at 6:53 am AST on 18 November 2018 (10:53 UTC), 17 km deep.
USGS: 9 km S of Guánica, Puerto Rico
32 km (20 mi) WSW of Ponce, PR
- When
- 6:53 am AST on 18 November 2018 ()
- Where
- 9 km (6 mi) south of Guánica, PR · earthquakes near Guánica
- Magnitude
- M 1.7 (md)
- Depth
- 17 km below the surface
- Felt
- no reports yet
- Nearest
- Guánica Municipio, 7 km NNW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2916 days ago
Earthquake alerts for Guánica, PR
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Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth it was probably too small to be felt, even directly above it. In Guánica, 9 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
Earthquakes near other towns within 30 km: Maria Antonia, Fuig, Palomas, Indios, Lluveras, Yauco.
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.
- Mineral, Virginia 2011 M 5.8 1,300,000× the energy of this one
- Magna, Utah 2020 M 5.7 930,000× the energy of this one
- Around the size people start to feel M 3.0 83× the energy of this one
- 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.
For this area
No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.
Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 17.8873, -66.9060. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Guánica Municipio, PR | 7 km (4 mi) | NNW | earthquakes near Guánica Municipio |
| Guayanilla Municipio, PR | 17 km (11 mi) | NE | earthquakes near Guayanilla Municipio |
| Lajas Municipio, PR | 17 km (11 mi) | NW | earthquakes near Lajas Municipio |
| Sabana Grande Municipio, PR | 22 km (14 mi) | NNW | earthquakes near Sabana Grande Municipio |
| Yauco Municipio, PR | 23 km (14 mi) | NNE | earthquakes near Yauco Municipio |
| Peñuelas Municipio, PR | 24 km (15 mi) | NE | earthquakes near Peñuelas Municipio |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
44 earthquakes have been recorded within 50 km since this one.
- 2.1 6 km ENE of Espino, Puerto Rico
- 1.6 3 km SSE of Mayagüez, Puerto Rico
- 2.5 2 km NW of Mayagüez, Puerto Rico
- 1.9 4 km WSW of Maricao, Puerto Rico
- 2.0 7 km WSW of Maricao, Puerto Rico
- 2.3 17 km W of Pole Ojea, Puerto Rico
- 2.8 3 km W of Mayagüez, Puerto Rico
- 2.7 37 km S of Guánica, Puerto Rico
- 1.9 5 km SSW of Adjuntas, Puerto Rico
- 2.0 17 km S of Pole Ojea, Puerto Rico
- 1.8 10 km SSE of La Parguera, Puerto Rico
- 1.5 Puerto Rico region
- 2.1 1 km NNW of Sabana Grande, Puerto Rico
- 2.0 0 km W of Sabana Grande, Puerto Rico
- 2.3 1 km SW of Espino, 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.
On USGS
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.