Earthquake · reviewed by a seismologist
M 2.4md
Earthquake near Adjuntas, PR
No earthquake was likely felt in Adjuntas in the 24 hours to 12:56 pm AST (16:56 UTC). The last one was M 3.0, 31 km (19 mi) SSW, at 3:45 am AST on 8 November 2026, estimated intensity II (weak) in town. Every earthquake near Adjuntas
This page: a magnitude 2.4 earthquake was recorded in Adjuntas, PR, at 1:10 am AST on 13 June 2018 (05:10 UTC), 20 km deep.
USGS: 1 km SSW of Adjuntas, Puerto Rico
20 km (12 mi) NNW of Ponce, PR
- When
- 1:10 am AST on 13 June 2018 ()
- Where
- in Adjuntas, PR · earthquakes near Adjuntas
- Magnitude
- M 2.4 (md)
- Depth
- 20 km below the surface
- Felt
- no reports yet
- Nearest
- Adjuntas Municipio, 5 km NW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3073 days ago
Earthquake alerts for Adjuntas, 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 6 km (4 mi) from the epicentre. 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: Adjuntas in town, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 110 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 95,000× the energy of this one
- Around the size people start to feel M 3.0 8.5× the energy of this one
- This earthquake M 2.4 about 110 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 lists 2 earthquakes of M5 or more within 50 km:
- 5.8 12 km N of Garrochales, Puerto Rico · 49 km NNE of this epicentre
- 5.8 4 km E of Moca, Puerto Rico · 46 km NW 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 18.1476, -66.7266. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Adjuntas Municipio, PR | 5 km (3 mi) | NW | earthquakes near Adjuntas Municipio |
| Peñuelas Municipio, PR | 13 km (8 mi) | S | earthquakes near Peñuelas Municipio |
| Utuado Municipio, PR | 14 km (9 mi) | N | earthquakes near Utuado Municipio |
| Yauco Municipio, PR | 15 km (10 mi) | WSW | earthquakes near Yauco Municipio |
| Jayuya Municipio, PR | 16 km (10 mi) | ENE | earthquakes near Jayuya Municipio |
| Guayanilla Municipio, PR | 18 km (11 mi) | SSW | earthquakes near Guayanilla Municipio |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
54 earthquakes have been recorded within 50 km since this one.
- 2.5 6 km ENE of Hormigueros, Puerto Rico
- 1.9 3 km NE of Sabana Eneas, Puerto Rico
- 1.6 3 km SSW of Monte Grande, Puerto Rico
- 1.7 1 km S of Lajas, Puerto Rico
- 2.2 9 km SSW of Tallaboa, Puerto Rico
- 2.3 9 km S of Jauca, Puerto Rico
- 1.7 4 km N of Sabana Grande, Puerto Rico
- 3.1 8 km N of Hatillo, Puerto Rico
- 1.9 4 km SSE of Ponce, Puerto Rico
- 1.9 1 km NE of Jauca, Puerto Rico
- 2.2 2 km NE of Jauca, Puerto Rico
- 2.5 13 km ESE of Maricao, Puerto Rico
- 1.7 1 km SSW of Adjuntas, Puerto Rico
- 1.6 3 km SW of Adjuntas, Puerto Rico
- 1.9 8 km S of La Parguera, 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.