M4.8 Earthquake 273 km NE of Santa Cruz das Flores, Portugal — July 24, 2021
2021-07-24 03:59:55 UTC (2021-07-24) · approx. 1:59 AM UTC-2 local
Felt by 4 people across nearby locations.
On July 24, 2021 at 03:59 UTC, a magnitude 4.8 shallow crustal earthquake struck 273 km NE of Santa Cruz das Flores, Portugal, at a depth of 10.0 km and coordinates 41.4825°, -29.2853°.
Physical scale: An earthquake of magnitude 4.8 releases seismic energy equivalent to roughly 239 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.2 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 4 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
-29.2853°E
Technical Information
Common Questions
How strong was the magnitude 4.8 earthquake near Santa Cruz das Flores, Portugal?
The magnitude 4.8 earthquake that struck 273 km NE of Santa Cruz das Flores, Portugal on July 24, 2021 at 03:59 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 41.4825°, -29.2853°, which is 273 km NE of Santa Cruz das Flores, Portugal.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.8 earthquakes can continue for several days and gradually diminish over time.
Authoritative source: USGS event page (event ID: us6000eyki). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, July 24, 2021). M4.8 Earthquake 273 km NE of Santa Cruz das Flores, Portugal — July 24, 2021. Retrieved October 3, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000eyki/