Earthquake · reviewed by a seismologist
M 3.7md
40 km ESE of Punta Cana, Dominican Republic
Yes. A magnitude 3.7 earthquake was recorded 40 km ESE of Punta Cana, Dominican Republic, at 2:19 am AST on 3 July 2021 (06:19 UTC), 105 km deep.
- When
- Magnitude
- M 3.7 (md)
- Depth
- 105 km below the surface
- Felt
- no reports yet
- Nearest
- Mayagüez Municipio, 40 km SSE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1888 days ago
Earthquake alerts for Rincón, PR
Get a notification in this browser when USGS records an earthquake near Rincón, 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.
How big was it?
This earthquake released about 5 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.7 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 34,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 1,500× the energy of this one
- Magna, Utah 2020 M 5.7 1,100× the energy of this one
- This earthquake M 3.7 about 5 tons of TNT
- Around the size people start to feel M 3.0 this one released 10× 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
The largest earthquake within 50 km in our catalogue was M 4.4 on 2020-11-04 — about 12 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 18.4038, -68.0688. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Mayagüez Municipio, PR | 40 km (25 mi) | SSE | earthquakes near Mayagüez Municipio |
| Rincón Municipio, PR | 87 km (54 mi) | E | earthquakes near Rincón Municipio |
| Aguada Municipio, PR | 93 km (58 mi) | E | earthquakes near Aguada Municipio |
| Aguadilla Municipio, PR | 98 km (61 mi) | E | earthquakes near Aguadilla Municipio |
| Añasco Municipio, PR | 100 km (62 mi) | E | earthquakes near Añasco Municipio |
| Cabo Rojo Municipio, PR | 104 km (65 mi) | ESE | earthquakes near Cabo Rojo Municipio |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
42 earthquakes have been recorded within 50 km since this one.
- 3.3 61 km NW of Rincón, Puerto Rico
- 3.0 61 km ESE of Punta Cana, Dominican Republic
- 3.8 35 km SSE of Punta Cana, Dominican Republic
- 3.3 63 km SE of Punta Cana, Dominican Republic
- 3.6 52 km SE of Punta Cana, Dominican Republic
- 3.7 Mona Passage
- 3.6 45 km SE of Boca de Yuma, Dominican Republic
- 3.6 8 km ESE of Punta Cana, Dominican Republic
- 3.3 39 km W of Rincón, Puerto Rico
- 3.5 44 km SE of Boca de Yuma, Dominican Republic
- 3.7 28 km ESE of Boca de Yuma, Dominican Republic
- 3.7 24 km SE of Boca de Yuma, Dominican Republic
- 3.0 28 km SSE of Punta Cana, Dominican Republic
- 2.8 49 km W of Stella, Puerto Rico
- 3.3 61 km SE of Punta Cana, 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.