M3.7 earthquake 27 km SSW of San Rafael del Yuma, La Altagracia Province, Dominican Republic
A magnitude 3.7 earthquake struck 27 km SSW of San Rafael del Yuma, La Altagracia Province, Dominican Republic at 19:33 local time (23:33 UTC) on 17 Sept 2026, at a depth of 147 km, according to USGS.
Data: USGS · updated 2026-09-18 02:32 UTC · reviewed
- Magnitude
- 3.7minor
duration magnitude (md) - Depth
- 147 km
- Status
- Reviewed
- Origin time
- 2026-09-17 23:33:25 UTC
- Local: 17 Sept 2026, 19:33:25 (America/Santo Domingo)
- Epicentre
- 18.206° N, 68.777° W
Circles show this event and others within 30 km from 7 days before to 30 days after. Lines: plate boundaries and GEM active faults. Open on the live map
Nearby places
| Place | Distance | Est. shaking |
|---|---|---|
| San Rafael del YumaLa Altagracia Province, Dominican Republic · pop. 5,285 | 27 km | INot felt |
| La RomanaDominican Republic · pop. 208,437 | 31 km | INot felt |
| Salvaleón de HigüeyLa Altagracia Province, Dominican Republic · pop. 123,787 | 47 km | INot felt |
| Punta CanaLa Altagracia Province, Dominican Republic · pop. 100,023 | 58 km | INot felt |
| San Pedro de MacorísDominican Republic · pop. 217,899 | 63 km | INot felt |
| Santo Domingo EsteSanto Domingo Province, Dominican Republic · pop. 700,000 | 118 km | INot felt |
| Santo DomingoNacional, Dominican Republic · pop. 2,201,941 | 121 km | INot felt |
| Santo Domingo OesteSanto Domingo Province, Dominican Republic · pop. 701,269 | 133 km | INot felt |
Shaking is an estimate from the intensity prediction equation of Allen, Wald & Worden (2012), not an observation. Local ground and buildings can change it by a level or more.
Every agency's solution
Agencies locate earthquakes with their own stations and methods, so their numbers differ. We match reports of the same event by time, distance and magnitude and show them side by side. The headline uses USGS · PR, which has been reviewed by an analyst.
| Agency | Magnitude | Depth | Epicentre | Time offset | Status |
|---|---|---|---|---|---|
| USGS · PRheadlinePuerto Rico Seismic Network via U.S. Geological Survey | 3.7 md | 147 km | 18.21° N, 68.78° W | – | Reviewed |
How big was it?
Often felt by people at rest close to the epicentre, rarely causes damage.
It released roughly the energy of 4.7 t of TNT. Magnitude is logarithmic: each whole step means about 32 times more energy and 10 times larger waves on a seismogram. Depth matters too: at 147 km this was a intermediate-depth earthquake, which spreads shaking over a wider area but less intensely.
M3.7 releases about 28× the energy of M2.7, and its waves are about 9.1× taller on a seismogram. Energy: 4.7 t of TNT vs 169 kg of TNT.
Each square is the energy of one M2.7. Energy from log₁₀E = 1.5M + 4.8.
Aftershocks and nearby activity
5 later earthquakes within 30 km; the largest was M4.0 6 days ago. Aftershock rates usually fall off roughly in proportion to 1/time.
Mainshock M3.7
5 later earthquakes nearby. Aftershock rates typically fall off roughly as 1/time (Omori's law).
| Time after mainshock (hours) | Magnitude | Depth (km) |
|---|---|---|
| 21.89 | 3.7 | 128 |
| 99.27 | 4.0 | 174 |
| 241.53 | 3.4 | 157 |
| 248.03 | 3.4 | 86 |
| 251.34 | 3.8 | 153 |
- 4.013 km S of La Romana, Dominican Republic09-22 02:49
- 3.86 km WSW of San Rafael del Yuma, La Altagracia Province, Dominican Republic09-28 10:54
- 3.735 km S of San Rafael del Yuma, La Altagracia Province, Dominican Republic09-18 21:26
- 3.419 km SE of La Romana, Dominican Republic09-28 01:05
- 3.432 km SSE of San Rafael del Yuma, La Altagracia Province, Dominican Republic09-28 07:35
Did you feel it?
Reports from people help show where shaking was strong. They are anonymous and shown here in aggregate.
Reports on SeismoAtlas
No reports yet.
Event id pr2026260000. First recorded here 28 Sept 2026, 17:32:11 UTC. Solutions: USGS · PR (usgs:pr2026260000). Cite as: SeismoAtlas, “M3.7 earthquake 27 km SSW of San Rafael del Yuma, La Altagracia Province, Dominican Republic”, https://seismoatlas.com/earthquake/pr2026260000-m3-7-earthquake-27-km-ssw-of-san-rafael-del-yuma-la-altagracia-province, data from USGS.
JSON: /api/v1/events/pr2026260000. SeismoAtlas is not an official warning service.