Earthquake · reviewed by a seismologist
M 1.9md
Mona Passage
Yes. A magnitude 1.9 earthquake was recorded in Mona Passage, 16 km (10 mi) S of Mayagüez, PR, at 12:07 pm AST on 14 September 2017 (16:07 UTC), 14 km deep.
16 km (10 mi) S of Mayagüez, PR · 120 km (74 mi) WSW of San Juan, PR
- When
- Magnitude
- M 1.9 (md)
- Depth
- 14 km below the surface
- Felt
- no reports yet
- Nearest
- Cabo Rojo Municipio, 8 km SW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3345 days ago
Earthquake alerts for Cabo Rojo, 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.
Earthquakes near other towns within 30 km: Cabo Rojo, Monte Grande, Boquerón, Puerto Real, Palmarejo, Sabana Eneas.
How big was it?
This earthquake released about 24 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 640,000× the energy of this one
- Magna, Utah 2020 M 5.7 450,000× the energy of this one
- Around the size people start to feel M 3.0 40× the energy of this one
- This earthquake M 1.9 about 24 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 18.0533, -67.1335. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Cabo Rojo Municipio, PR | 8 km (5 mi) | SW | earthquakes near Cabo Rojo Municipio |
| Hormigueros Municipio, PR | 9 km (6 mi) | NNE | earthquakes near Hormigueros Municipio |
| San Germán Municipio, PR | 12 km (7 mi) | ENE | earthquakes near San Germán Municipio |
| Lajas Municipio, PR | 13 km (8 mi) | SE | earthquakes near Lajas Municipio |
| Sabana Grande Municipio, PR | 20 km (12 mi) | E | earthquakes near Sabana Grande Municipio |
| Maricao Municipio, PR | 25 km (15 mi) | ENE | earthquakes near Maricao Municipio |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
52 earthquakes have been recorded within 50 km since this one.
- 2.9 Puerto Rico region
- 2.5 16 km SW of Stella, Puerto Rico
- 1.9 Mona Passage
- 2.2 Puerto Rico region
- 2.6 Mona Passage
- 2.2 2 km S of Guánica, Puerto Rico
- 2.7 21 km SW of Stella, Puerto Rico
- 1.6 0 km SE of Fuig, Puerto Rico
- 1.6 Puerto Rico region
- 2.0 15 km SSW of Stella, Puerto Rico
- 2.7 11 km E of Maricao, Puerto Rico
- 1.7 2 km SE of Maria Antonia, Puerto Rico
- 2.3 3 km WNW of Santo Domingo, Puerto Rico
- 2.5 11 km WNW of Puerto Real, Puerto Rico
- 2.2 5 km NNW of Puerto Real, 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.