M 5.5 Earthquake Hits Carlsberg Ridge
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 5.5 earthquake occurred in the Carlsberg Ridge, at a depth of 10 kilometers, on December 9, 2023, at 10:46 PM UTC.
What this USGS earthquake report tells you, and what most readers miss
This notice was issued by USGS on April 18, 2026 and geographically references Carlsberg Ridge. Its severity classification of "medium" 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, Carlsberg Ridge.
What Happened
A magnitude 5.5 mww earthquake struck the Carlsberg Ridge on December 9, 2023, at 10:46 PM UTC. The event occurred at a depth of 10 kilometers.
Location Details
The earthquake was centered at the Carlsberg Ridge, with coordinates at latitude 6.409 and longitude 60.2178. This depth of 10 kilometers is considered shallow, as earthquakes less than 20 kilometers deep can produce more intense shaking near the epicenter.
Impact Assessment
No felt reports were available for this event. There was no tsunami advisory issued, and no alert level was specified.
What You Should Know
This moderate earthquake, with a magnitude of 5.5, can potentially cause damage to poorly constructed buildings. Aftershocks are possible following such events, so individuals in the area should follow general safety tips like staying informed through official channels and preparing an emergency plan if in a seismic zone.
Source
This information is from the United States Geological Survey (USGS). For more details, visit: USGS Event Page
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 (1,132 characters here).
Similar severity timing
Same severity (medium) notices issued closest in time to April 18, 2026.
Frequently Asked Questions
Common questions about this USGS earthquake report.