M5.1 Earthquake 149 km S of George Town, Cayman Islands — July 18, 2026
2026-07-18 16:08:44 UTC (4 hours ago) · approx. 11:08 AM UTC-5 local
Felt by 3 people across nearby locations.
On July 18, 2026 at 16:08 UTC, a magnitude 5.1 shallow crustal earthquake struck 149 km S of George Town, Cayman Islands, at a depth of 10.0 km and coordinates 17.9439°, -81.5431°. This earthquake was detected by 194 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 401, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 5.1 releases seismic energy equivalent to roughly 674 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 2.0 km — a useful intuition for the size of the slip patch on the fault.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 3 citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
-81.5431°E
Technical Information
Common Questions
How strong was the magnitude 5.1 earthquake near George Town, Cayman Islands?
The magnitude 5.1 earthquake that struck 149 km S of George Town, Cayman Islands on July 18, 2026 at 16:08 UTC had a depth of 10.0 km. For context, this was a moderate earthquake that could be widely felt.
Where did the earthquake occur?
The earthquake epicenter was located at 17.9439°, -81.5431°, which is 149 km S of George Town, Cayman Islands.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.1 earthquakes can continue for days to weeks and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us7000t1mu). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, July 18, 2026). M5.1 Earthquake 149 km S of George Town, Cayman Islands — July 18, 2026. Retrieved July 18, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000t1mu/