M3.1 earthquake 83 km S of San Rafael del Yuma, La Altagracia Province, Dominican Republic
A magnitude 3.1 earthquake struck 83 km S of San Rafael del Yuma, La Altagracia Province, Dominican Republic at 12:59 local time (16:59 UTC) on 20 Sept 2026, at a depth of 35 km, according to USGS.
Data: USGS · updated 2026-09-20 17:56 UTC · reviewed
- Magnitude
- 3.1minor
local magnitude (Richter) (ml) - Depth
- 35 km
- Status
- Reviewed
- Origin time
- 2026-09-20 16:59:30 UTC
- Local: 20 Sept 2026, 12:59:30 (America/Santo Domingo)
- Epicentre
- 17.686° N, 68.691° 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 | 83 km | INot felt |
| La RomanaDominican Republic · pop. 208,437 | 87 km | INot felt |
| Salvaleón de HigüeyLa Altagracia Province, Dominican Republic · pop. 123,787 | 104 km | INot felt |
| Punta CanaLa Altagracia Province, Dominican Republic · pop. 100,023 | 104 km | INot felt |
| San Pedro de MacorísDominican Republic · pop. 217,899 | 107 km | INot felt |
| Santo Domingo EsteSanto Domingo Province, Dominican Republic · pop. 700,000 | 152 km | INot felt |
| Santo DomingoNacional, Dominican Republic · pop. 2,201,941 | 154 km | INot felt |
| Santo Domingo OesteSanto Domingo Province, Dominican Republic · pop. 701,269 | 165 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, which has been reviewed by an analyst.
| Agency | Magnitude | Depth | Epicentre | Time offset | Status |
|---|---|---|---|---|---|
| USGSheadlineUSGS NEIC via U.S. Geological Survey | 3.1 ml | 35 km | 17.69° N, 68.69° W | – | Reviewed |
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How big was it?
Often felt by people at rest close to the epicentre, rarely causes damage.
It released roughly the energy of 674 kg 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 35 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.
M3.1 releases about 32× the energy of M2.1, and its waves are about 10× taller on a seismogram. Energy: 674 kg of TNT vs 21 kg of TNT.
Each square is the energy of one M2.1. Energy from log₁₀E = 1.5M + 4.8.
Aftershocks and nearby activity
1 later earthquake within 30 km; the largest was M3.6 7 days ago. Aftershock rates usually fall off roughly in proportion to 1/time.
Mainshock M3.1
1 later earthquake nearby. Aftershock rates typically fall off roughly as 1/time (Omori's law).
| Time after mainshock (hours) | Magnitude | Depth (km) |
|---|---|---|
| 9.81 | 3.6 | 13 |
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 us7000tisb. First recorded here 28 Sept 2026, 17:32:10 UTC. Solutions: USGS (usgs:us7000tisb). Cite as: SeismoAtlas, “M3.1 earthquake 83 km S of San Rafael del Yuma, La Altagracia Province, Dominican Republic”, https://seismoatlas.com/earthquake/us7000tisb-m3-1-earthquake-83-km-s-of-san-rafael-del-yuma-la-altagracia-province-dominican, data from USGS.
JSON: /api/v1/events/us7000tisb. SeismoAtlas is not an official warning service.