Earthquake · reviewed by a seismologist
M 3.0Md
Mona Passage
Yes. A magnitude 3.0 earthquake was recorded in Mona Passage, 15 km (10 mi) NW of Mayagüez, PR, at 1:42 am AST on 26 September 2016 (05:42 UTC), 91 km deep.
15 km (10 mi) NW of Mayagüez, PR · 127 km (79 mi) W of San Juan, PR
- When
- Magnitude
- M 3.0 (Md)
- Depth
- 91 km below the surface
- Felt
- no reports yet
- Nearest
- Rincón Municipio, 7 km N
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3620 days ago
Earthquake alerts for Stella, PR
Get a notification in this browser when USGS records an earthquake near Stella, PR. No account or email needed.
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 it was probably too small to be felt, even directly above it. 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: Stella, Rincón, La Playa, Las Marias, Añasco, Aguada.
How big was it?
This earthquake released about 950 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 350,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 16,000× the energy of this one
- Magna, Utah 2020 M 5.7 11,000× the energy of this one
- This earthquake M 3.0 about 950 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.
Where
Epicentre 18.2780, -67.2620. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Rincón Municipio, PR | 7 km (4 mi) | N | earthquakes near Rincón Municipio |
| Aguada Municipio, PR | 14 km (8 mi) | NE | earthquakes near Aguada Municipio |
| Añasco Municipio, PR | 14 km (9 mi) | E | earthquakes near Añasco Municipio |
| Hormigueros Municipio, PR | 22 km (14 mi) | SE | earthquakes near Hormigueros Municipio |
| Moca Municipio, PR | 22 km (14 mi) | ENE | earthquakes near Moca Municipio |
| Aguadilla Municipio, PR | 26 km (16 mi) | NNE | earthquakes near Aguadilla Municipio |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
39 earthquakes have been recorded within 50 km since this one.
- 1.9 2 km NNW of Hormigueros, Puerto Rico
- 1.6 0 km ENE of Lajas, Puerto Rico
- 3.1 Mona Passage
- 1.6 2 km SSW of Hormigueros, Puerto Rico
- 2.5 36 km NW of Rincón, Puerto Rico
- 2.0 4 km NNE of Lluveras, Puerto Rico
- 2.3 3 km SSW of Pole Ojea, Puerto Rico
- 2.3 2 km SSE of La Playa, Puerto Rico
- 1.9 3 km N of Sabana Eneas, Puerto Rico
- 2.5 24 km SW of Stella, Puerto Rico
- 2.3 13 km NW of Puerto Real, Puerto Rico
- 2.8 Mona Passage
- 2.1 2 km SSE of Lajas, Puerto Rico
- 2.3 7 km NE of Sabana Grande, Puerto Rico
- 2.1 22 km NW of Rincón, 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.