M2.5 Earthquake 44 km WSW of Carlsbad, CA — July 28, 2026
2026-07-28 22:15:02 UTC (2026-07-28) · approx. 2:15 PM UTC-8 local
On July 28, 2026 at 22:15 UTC, a magnitude 2.5 shallow crustal earthquake struck 44 km WSW of Carlsbad, CA, at a depth of 9.8 km and coordinates 32.9990°, -117.7847°.
Physical scale: An earthquake of magnitude 2.5 releases seismic energy equivalent to roughly 73.9 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 30 m — 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 1 citizen response 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
-117.7847°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 2.5 earthquake near Carlsbad, CA?
The magnitude 2.5 earthquake that struck 44 km WSW of Carlsbad, CA on July 28, 2026 at 22:15 UTC had a depth of 9.8 km. For context, this was a minor earthquake typically detected only by instruments.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 2.5 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 2.5 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: ci40662730). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, July 28, 2026). M2.5 Earthquake 44 km WSW of Carlsbad, CA — July 28, 2026. Retrieved July 30, 2026 from https://www.earthquaketracker.org/earthquakes/event/ci40662730/