Earthquake · reviewed by a seismologist
M 1.6md
Earthquake near Liborio Negron Torres, PR
USGS: 2 km WSW of Liborio Negron Torres, Puerto Rico
36 km (22 mi) W of Ponce, PR · 27 km (17 mi) SE of Mayagüez, PR
- When
- 1:52 pm AST on 30 September 2026 ()
- Where
- 2 km (1 mi) WSW of Liborio Negron Torres, PR · earthquakes near Liborio Negron Torres
- Magnitude
- M 1.6 (md)
- Depth
- 7.4 km below the surface
- Felt
- no reports yet
- Nearest
- Sabana Grande Municipio, 6 km NNE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2 days ago
A magnitude 1.6 earthquake was recorded 2 km (1 mi) WSW of Liborio Negron Torres, PR, at 1:52 pm AST on 30 September 2026 (17:52 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
Earthquakes near other towns within 30 km: Sabana Grande, Lluveras, Fuig, Guánica, Palomas, Maria Antonia.
How big was it?
This earthquake released about 7.8 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,900,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
- Around the size people start to feel M 3.0 120× the energy of this one
- This earthquake M 1.6 about 7.8 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 15,000,000 times the energy of this one.
Before 2016, the USGS record lists 3 earthquakes of M5 or more within 50 km:
- 5.8 4 km E of Moca, Puerto Rico · 42 km NNW of this epicentre
- 5.2 19 km SW of Stella, Puerto Rico · 46 km WNW of this epicentre
- 5.1 21 km SW of Stella, Puerto Rico · 46 km WNW of this epicentre
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 18.0330, -66.9620. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Sabana Grande Municipio, PR | 6 km (4 mi) | NNE | earthquakes near Sabana Grande Municipio |
| Lajas Municipio, PR | 10 km (6 mi) | SW | earthquakes near Lajas Municipio |
| Guánica Municipio, PR | 10 km (6 mi) | SSE | earthquakes near Guánica Municipio |
| San Germán Municipio, PR | 12 km (7 mi) | NW | earthquakes near San Germán Municipio |
| Yauco Municipio, PR | 12 km (8 mi) | ENE | earthquakes near Yauco Municipio |
| Maricao Municipio, PR | 16 km (10 mi) | N | earthquakes near Maricao Municipio |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
6 earthquakes have been recorded within 50 km since this one.
- 2.2 0 km SSW of Maria Antonia, Puerto Rico
- 2.3 5 km WSW of Guánica, Puerto Rico
- 2.1 24 km S of Guánica, Puerto Rico
- 2.2 5 km WSW of Fuig, Puerto Rico
- 2.5 2 km S of Guánica, Puerto Rico
- 2.6 5 km SW of Guánica, 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.