M 3.9 Experimental Explosion - 171 km ENE of Flagler Beach, Florida
Areazine synthesizes this USGS earthquake report directly from USGS's official public data feed. See our methodology for full source attribution and refresh cadence.
A magnitude 3.9 experimental explosion occurred 171 km ENE of Flagler Beach, Florida, on July 28, 2026.
What this USGS earthquake report tells you, and what most readers miss
This notice was issued by USGS on August 10, 2026 and geographically references Florida. Its severity classification of "low" signals how the issuing agency weighs the risk of harm if no action is taken - "critical" and "high" tier alerts typically carry direct consumer actions, while "medium" and "low" tend toward informational guidance or monitoring advisories. The category it belongs to - Earthquakes - determines the monitoring protocol behind it, which shapes what follow-up action (checking for structural damage, watching for aftershocks, reviewing local building codes) is relevant and which agency holds authority over the assessment.
Most readers skim a notice like this, check whether they are personally affected, and move on. The more useful lens is to verify its scope, source, and timestamp, then compare related notices without assuming that one record proves a broader trend.
Areazine pairs this record with the original agency URL so you can check the primary source before acting. Its related labels are earthquake, seismic, usgs, Florida.
What Happened
A M 3.9 mb experimental explosion was recorded at 12:32:54 UTC on July 28, 2026 (Unix time 1785258774479). The event had a depth of 0 km.
Location Details
The explosion was located at 30.0308°N, 79.4734°W, 171 km ENE of Flagler Beach, Florida. A depth of 0 km is classified as very shallow.
Impact Assessment
The event was felt by 1 person, with a maximum reported intensity (CDI) of 2. No tsunami was generated (tsunami flag: 0) and no alert level was issued.
What You Should Know
Events of this magnitude are typically minor. No damage or injuries are reported in the available data.
Source
Data from USGS: https://earthquake.usgs.gov/earthquakes/eventpage/us6000tgf0
Original source: USGS Official Notice ↗
Related Earthquakes
All Earthquakes →Nationwide notices with similar length or severity timing 8
Two Areazine-derived peer sets for this USGS earthquake report: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (702 characters here).
Similar severity timing
Same severity (low) notices issued closest in time to August 10, 2026.
Frequently Asked Questions
Common questions about this USGS earthquake report.