M5.9 Earthquake 275 km SSW of Lajes das Flores, Portugal — November 28, 2022
2022-11-28 02:51:23 UTC (2022-11-28) · approx. 12:51 AM UTC-2 local
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On November 28, 2022 at 02:51 UTC, a magnitude 5.9 shallow crustal earthquake struck 275 km SSW of Lajes das Flores, Portugal, at a depth of 10.0 km and coordinates 37.0894°, -32.4044°. The USGS PAGER system issued a green alert level for this event, indicating no significant casualties or damage expected. This earthquake was detected by 127 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 536, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 5.9 releases seismic energy equivalent to roughly 11 kilotons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 7.1 km — a useful intuition for the size of the slip patch on the fault.
ShakeMap — predicted shaking intensity
Modeled ground-motion intensity contoured on the Modified Mercalli scale (MMI). Computed by the USGS from the moment-tensor solution and regional ground-motion prediction equations.
Source: U.S. Geological Survey ShakeMap. View interactive ShakeMap on USGS
Earthquake Details
-32.4044°E
Technical Information
Common Questions
How strong was the magnitude 5.9 earthquake near Lajes das Flores, Portugal?
The magnitude 5.9 earthquake that struck 275 km SSW of Lajes das Flores, Portugal on November 28, 2022 at 02:51 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 37.0894°, -32.4044°, which is 275 km SSW of Lajes das Flores, Portugal.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.9 earthquakes can continue for days to weeks and gradually diminish over time.
Authoritative source: USGS event page (event ID: us7000isuh). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, November 28, 2022). M5.9 Earthquake 275 km SSW of Lajes das Flores, Portugal — November 28, 2022. Retrieved February 5, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000isuh/