Earthquake · reviewed by a seismologist
M 2.2md
Mona Passage
Yes. A magnitude 2.2 earthquake was recorded in Mona Passage, 23 km (14 mi) WSW of Mayagüez, PR, at 12:51 pm AST on 28 June 2018 (16:51 UTC), 17 km deep.
23 km (14 mi) WSW of Mayagüez, PR · 138 km (85 mi) WSW of San Juan, PR
- When
- Magnitude
- M 2.2 (md)
- Depth
- 17 km below the surface
- Felt
- no reports yet
- Nearest
- Cabo Rojo Municipio, 19 km SE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3058 days ago
Earthquake alerts for Puerto Real, 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 7 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: Puerto Real, Boquerón, Cabo Rojo, Pole Ojea, Hormigueros, Mayagüez.
How big was it?
This earthquake released about 58 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 260,000× the energy of this one
- Magna, Utah 2020 M 5.7 180,000× the energy of this one
- Around the size people start to feel M 3.0 16× the energy of this one
- This earthquake M 2.2 about 58 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
The largest earthquake within 50 km in our catalogue was M 4.3 on 2017-10-14 — about 1,500 times the energy of this one.
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 18.0930, -67.3246. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Cabo Rojo Municipio, PR | 19 km (12 mi) | SE | earthquakes near Cabo Rojo Municipio |
| Hormigueros Municipio, PR | 23 km (14 mi) | ENE | earthquakes near Hormigueros Municipio |
| Rincón Municipio, PR | 28 km (18 mi) | NNE | earthquakes near Rincón Municipio |
| Añasco Municipio, PR | 30 km (18 mi) | NE | earthquakes near Añasco Municipio |
| San Germán Municipio, PR | 30 km (19 mi) | E | earthquakes near San Germán Municipio |
| Lajas Municipio, PR | 33 km (20 mi) | ESE | earthquakes near Lajas Municipio |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
41 earthquakes have been recorded within 50 km since this one.
- 2.1 43 km WSW of Stella, Puerto Rico
- 1.6 8 km ENE of Sabana Grande, Puerto Rico
- 1.6 13 km S of La Parguera, Puerto Rico
- 1.6 10 km SSE of La Parguera, Puerto Rico
- 2.5 19 km W of Rincón, Puerto Rico
- 1.6 18 km SSW of Guánica, Puerto Rico
- 2.0 4 km SSW of Añasco, Puerto Rico
- 2.0 3 km N of Puerto Real, Puerto Rico
- 1.9 12 km W of Pole Ojea, Puerto Rico
- 1.9 6 km W of Las Marías, Puerto Rico
- 1.8 4 km NE of La Parguera, Puerto Rico
- 2.2 6 km NNE of Sabana Grande, Puerto Rico
- 2.0 5 km W of Mayagüez, Puerto Rico
- 1.7 3 km WNW of Pole Ojea, Puerto Rico
- 1.9 5 km NW of Mayagüez, 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.