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Significant earthquake

This summarises a recorded earthquake only; it is not a warning or a prediction. Follow AFAD and the competent authorities for official statements and guidance.

21 km SE of Esperanza, Puerto Rico earthquake sequence

Active Gardner–Knopoff windows · 28.10.2026 12:44 – ongoing

Earthquakes
4
Largest
M4,1
Mainshock
M4,1 · 21 km SE of Esperanza, Puerto Rico · 28.10.2026 12:44

Earthquakes of the sequence (oldest to newest)

Earthquakes per day

Earthquakes in the sequence

MagnitudeLocationTime (Europe/Istanbul)Depth
4.1 21 km SE of Esperanza, Puerto Rico 28.10.2026 12:44 25,0 km
2.4 PUERTO RICO REGION 28.10.2026 14:20 29,7 km
2.5 PUERTO RICO REGION 28.10.2026 18:19 33,8 km
2.9 22 km SE of Esperanza, Puerto Rico 29.10.2026 19:08 16,6 km

Sequences group earthquakes that have occurred by proximity in time and location (Gardner–Knopoff windows, Poisson rate test). Follow AFAD and Kandilli Observatory for official assessments. (Gardner & Knopoff (1974))