Earthquake · reviewed by a seismologist
M 2.4md
Earthquake near Guánica, PR
Yes: an earthquake was likely felt in Guánica in the last 24 hours. M 2.1, 7 km (4 mi) ESE of Guánica, at 6:08 am AST on 18 October 2026 (10:08 UTC); the estimated shaking in Guánica was intensity II (weak). Every earthquake near Guánica
This page: a magnitude 2.4 earthquake was recorded 5 km (3 mi) west-southwest of Guánica, PR, at 4:34 am AST on 16 October 2026 (08:34 UTC), 7.8 km deep.
USGS: 5 km WSW of Guánica, Puerto Rico
35 km (22 mi) W of Ponce, PR · 34 km (21 mi) SE of Mayagüez, PR
- When
- 4:34 am AST on 16 October 2026 ()
- Where
- 5 km (3 mi) west-southwest of Guánica, PR · earthquakes near Guánica
- Magnitude
- M 2.4 (md)
- Depth
- 7.8 km below the surface
- Felt
- no reports yet
- Nearest
- Guánica Municipio, 3 km E
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3 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, people at rest would likely notice it out to about 20 km (12 mi) from the epicentre. In Guánica, 5 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.
Likely felt in: Guánica 5 km, intensity II · Fuig 6 km, intensity II · Maria Antonia 7 km, intensity II · Liborio Negron Torres 10 km, intensity II · La Parguera 10 km, intensity II · Palomas 11 km, intensity II · Lluveras 11 km, intensity II · Sabana Grande 14 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 120 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 130,000× the energy of this one
- Magna, Utah 2020 M 5.7 89,000× the energy of this one
- Around the size people start to feel M 3.0 7.9× the energy of this one
- This earthquake M 2.4 about 120 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
The largest earthquake within 50 km since 2016 was M 6.4 on 2020-01-07 — about 1,000,000 times the energy of this one.
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 17.9522, -66.9527. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Guánica Municipio, PR | 3 km (2 mi) | E | earthquakes near Guánica Municipio |
| Lajas Municipio, PR | 10 km (6 mi) | WNW | earthquakes near Lajas Municipio |
| Sabana Grande Municipio, PR | 15 km (9 mi) | N | earthquakes near Sabana Grande Municipio |
| Guayanilla Municipio, PR | 17 km (11 mi) | ENE | earthquakes near Guayanilla Municipio |
| Yauco Municipio, PR | 18 km (11 mi) | NE | earthquakes near Yauco Municipio |
| San Germán Municipio, PR | 19 km (12 mi) | NNW | earthquakes near San Germán Municipio |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
9 earthquakes have been recorded within 50 km since this one.
- 2.2 6 km SSE of Ponce, Puerto Rico
- 2.1 5 km SE of Maria Antonia, Puerto Rico
- 2.2 4 km SW of Guánica, Puerto Rico
- 2.0 1 km WSW of Guánica, Puerto Rico
- 2.7 7 km SSE of Ponce, Puerto Rico
- 2.4 6 km SSE of Ponce, Puerto Rico
- 2.4 7 km SSE of Ponce, Puerto Rico
- 2.3 7 km SSE of Ponce, Puerto Rico
- 2.3 7 km SSE of Ponce, 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.