Earthquake · reviewed by a seismologist
M 3.1md
95 km SW of Pole Ojea, Puerto Rico
Yes. A magnitude 3.1 earthquake was recorded 95 km SW of Pole Ojea, Puerto Rico, at 1:59 am AST on 30 September 2024 (05:59 UTC), 37 km deep.
- When
- Magnitude
- M 3.1 (md)
- Depth
- 37 km below the surface
- Felt
- no reports yet
- Nearest
- Mayagüez Municipio, 73 km N
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 772 days ago
Earthquake alerts for Pole Ojea, 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 small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.
At this magnitude and depth, people at rest would likely notice it out to about 18 km (11 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.
How big was it?
This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 270,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 12,000× the energy of this one
- Magna, Utah 2020 M 5.7 8,500× the energy of this one
- This earthquake M 3.1 about 1,300 lb of TNT
- Around the size people start to feel M 3.0 this one released 1.3× 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.
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 17.4270, -67.8830. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Mayagüez Municipio, PR | 73 km (45 mi) | N | earthquakes near Mayagüez Municipio |
| Cabo Rojo Municipio, PR | 98 km (61 mi) | NE | earthquakes near Cabo Rojo Municipio |
| Lajas Municipio, PR | 108 km (67 mi) | NE | earthquakes near Lajas Municipio |
| Hormigueros Municipio, PR | 113 km (70 mi) | NE | earthquakes near Hormigueros Municipio |
| Guánica Municipio, PR | 117 km (73 mi) | ENE | earthquakes near Guánica Municipio |
| San Germán Municipio, PR | 117 km (73 mi) | NE | earthquakes near San Germán Municipio |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
17 earthquakes have been recorded within 50 km since this one.
- 3.3 64 km SW of Pole Ojea, Puerto Rico
- 3.7 110 km SW of Pole Ojea, Puerto Rico
- 3.4 105 km SW of Pole Ojea, Puerto Rico
- 3.4 86 km SW of Pole Ojea, Puerto Rico
- 3.3 83 km SE of Boca de Yuma, Dominican Republic
- 4.7 106 km WSW of Pole Ojea, Puerto Rico
- 3.4 89 km SSE of Boca de Yuma, Dominican Republic
- 3.0 65 km SW of Pole Ojea, Puerto Rico
- 3.9 123 km SSE of Boca de Yuma, Dominican Republic
- 3.0 54 km SW of Pole Ojea, Puerto Rico
- 3.4 83 km W of Pole Ojea, Puerto Rico
- 2.9 61 km SW of Pole Ojea, Puerto Rico
- 3.5 94 km SW of Pole Ojea, Puerto Rico
- 3.6 96 km SW of Pole Ojea, Puerto Rico
- 3.3 85 km SSE of Boca de Yuma, Dominican Republic
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.