Reported by USGS today.
It is the 4th strongest of the 22 detections recorded within 20 km of this point since 20 March 2026. The last comparable one was on 29 August 2026.
What the source measured
USGS reported: 48 km NNW of San Antonio, Puerto Rico
Nearby, since 20 March 2026
- August 30, 2026 · score 0 · 4.1 km
- July 9, 2026 · score 0 · 6.2 km
- July 24, 2026 · score 7 · 6.5 km
How we know
Confirmed by 3 independent sources, including USGS.
Our own score for this event is 2 out of 100, at 74 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Earthquake |
| Severity | low |
| Calamity Score (ours) | 2 / 100 |
| Our confidence | 74% |
| Coordinates | 18.9034, -67.2509 |
| Timestamp | 2026-08-30T05:47:02.828Z |
| Source | https://earthquake.usgs.gov/earthquakes/eventpage/us7000tcwu |
Score Breakdown
Technical Details
| Mag | 4.2 |
| Depth | 35 |
| Tsunami | false |
| Sig | 271 |
| Emsc Mag | 4.2 |
| Emsc Depth | -35 |
| Emsc MagType | mb |
| Emsc Region | PUERTO RICO REGION |
| Emsc Auth | NEIC |
| Emsc SourceId | 2053119 |
| Usgs Caribbean Mag | 4.2 |
| Usgs Caribbean Depth | 35 |
| Usgs Caribbean Sig | 271 |
| Usgs Caribbean Tsunami | false |
| Usgs Caribbean Region | 48 km NNW of San Antonio, Puerto Rico |
| MergedSources | [{"id":"emsc_20260830_0000078","source":"emsc","severity":"low","severityValue":25.200000000000003,"timestamp":1788068822828,"latitude":18.9034,"longitude":-67.2509},{"id":"usgs_caribbean_us7000tcwu","source":"usgs_caribbean","severity":"low","severityValue":25.200000000000003,"timestamp":1788068822828,"latitude":18.9034,"longitude":-67.2509}] |
Safety Information
If you feel shaking: Drop, Cover, and Hold On. Move away from windows, heavy objects, and exterior walls. After shaking stops, check for injuries and structural damage. Be prepared for aftershocks, which can occur minutes to months after the mainshock. Follow instructions from local emergency management authorities.
Series begins 10 February 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Calamity.live data shows a earthquake event with CalamityScore 2/100 (Puerto Rico), based on data from usgs. Source: Calamity.live, a platform aggregating real-time data from 194 scientific monitoring sources.