M3.4 Earthquake – 31 km N of Isabela, Puerto Rico
Oct 28, 2026 01:00 UTC (13 days ago)
- Magnitude
- 3.4 (md)
- Time
- Oct 28, 2026 01:00 UTC
- Depth
- 9.5 km (5.9 mi)
- Epicenter
- 18.781°, -67.049°
- Location
- 31 km N of Isabela, Puerto Rico
- Reported by
- USGS, EMSC · USGS event page
Each circle is an earthquake. Bigger and redder = stronger. The ring marks 100 km around the epicenter.
Magnitude<33–44–55–66+AgeLast hourLast 24 hOlder
Other earthquakes within 100 km (last 30 days)
| Mag | Location | When |
|---|---|---|
| 2.1 | 0 km NNW of Guayanilla, Puerto Rico | 4 h ago Nov 9, 2026 20:39 UTC |
| 3.5 | 59 km NW of San Antonio, Puerto Rico | 17 h ago Nov 9, 2026 07:19 UTC |
| 2.2 | 5 km ESE of Boquerón, Puerto Rico | 21 h ago Nov 9, 2026 03:57 UTC |
| 2.1 | 2 km E of Magas Arriba, Puerto Rico | 37 h ago Nov 8, 2026 12:08 UTC |
| 3.0 | 8 km SSE of Maria Antonia, Puerto Rico | 41 h ago Nov 8, 2026 07:45 UTC |
| 2.9 | 2 km NNW of La Parguera, Puerto Rico | 41 h ago Nov 8, 2026 07:17 UTC |
| 2.1 | 1 km W of La Parguera, Puerto Rico | 2 days ago Nov 7, 2026 23:43 UTC |
| 3.0 | 1 km WSW of La Parguera, Puerto Rico | 2 days ago Nov 7, 2026 21:47 UTC |
| 2.5 | 1 km NW of Magas Arriba, Puerto Rico | 2 days ago Nov 7, 2026 19:24 UTC |
| 2.2 | 0 km NW of Aguilita, Puerto Rico | 2 days ago Nov 7, 2026 14:09 UTC |
Learn more
- The Earthquake Magnitude Scale ExplainedRichter versus moment magnitude, what each level feels like, and how often each size occurs.
- Earthquake Depth Explained: Why It MattersShallow, intermediate and deep earthquakes, why depth changes the shaking, and how reliable the number is.
- What to Do Before, During and After an EarthquakeDrop, Cover and Hold On, what to do in a car or near the coast, and how to handle aftershocks.
Magnitudes and locations come from automatic or reviewed solutions and are often revised in the hours after an earthquake. Email alerts are coming soon; join the waiting list.