Earthquake · reviewed by a seismologist
M 1.7md
Mona Passage
Yes. A magnitude 1.7 earthquake was recorded in Mona Passage, 10 km (6 mi) ESE of Mayagüez, PR, at 2:34 am AST on 7 February 2019 (06:34 UTC), 32 km deep.
10 km (6 mi) ESE of Mayagüez, PR · 109 km (67 mi) WSW of San Juan, PR
- When
- Magnitude
- M 1.7 (md)
- Depth
- 32 km below the surface
- Felt
- no reports yet
- Nearest
- San Germán Municipio, 6 km SSE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2835 days ago
Earthquake alerts for Hormigueros, PR
Get a notification in this browser when USGS records an earthquake near Hormigueros, 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 minor earthquake. Quakes this small are rarely felt and do not cause 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: Hormigueros, Sabana Eneas, San Germán, Maricao, Monte Grande, Mayagüez.
How big was it?
This earthquake released about 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
- Around the size people start to feel M 3.0 89× the energy of this one
- This earthquake M 1.7 about 11 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 18.1573, -67.0578. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| San Germán Municipio, PR | 6 km (4 mi) | SSE | earthquakes near San Germán Municipio |
| Hormigueros Municipio, PR | 7 km (4 mi) | WSW | earthquakes near Hormigueros Municipio |
| Las Marías Municipio, PR | 12 km (7 mi) | NE | earthquakes near Las Marías Municipio |
| Maricao Municipio, PR | 13 km (8 mi) | E | earthquakes near Maricao Municipio |
| Sabana Grande Municipio, PR | 14 km (9 mi) | SE | earthquakes near Sabana Grande Municipio |
| Añasco Municipio, PR | 16 km (10 mi) | NNW | earthquakes near Añasco Municipio |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
49 earthquakes have been recorded within 50 km since this one.
- 2.1 8 km WNW of San Antonio, Puerto Rico
- 2.0 5 km NNE of Ponce, Puerto Rico
- 1.9 4 km N of Ponce, Puerto Rico
- 2.0 10 km SSE of La Parguera, Puerto Rico
- 1.8 10 km WSW of Adjuntas, Puerto Rico
- 2.6 25 km W of Puerto Real, Puerto Rico
- 2.9 4 km S of La Playa, Puerto Rico
- 1.9 1 km SW of Magas Arriba, Puerto Rico
- 1.9 3 km S of Tallaboa, Puerto Rico
- 1.9 22 km W of Rincón, Puerto Rico
- 2.1 6 km S of Tallaboa, Puerto Rico
- 2.0 3 km WNW of Maricao, Puerto Rico
- 1.8 13 km E of Maricao, Puerto Rico
- 1.6 13 km S of Tallaboa, Puerto Rico
- 1.7 10 km WNW of Adjuntas, 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.