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Significant earthquake

This summarises a recorded earthquake only; it is not a warning or a prediction. Follow AFAD and the competent authorities for official statements and guidance.

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5.1

39 km W of Mosteiros, Portugal

20 October 2026, 21:07:18 (+03) 2026-10-20 18:07:18 UTC

2 sources: USGS, GFZ mww
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Magnitude
5.1 mww
Depth
10.0 km
Coordinates
37.9575, -26.2588
Data consistency
90/100

Regional activity (100 km)

Last 24 hours
1
Last 7 days
3
Last 30 days
52

Approximate energy released

≈ 674 t TNT

2.82e+12 J

Approximated with the Gutenberg–Richter relation (log E = 1.5 M + 4.8); depends on magnitude type. Gutenberg & Richter (1956).

Did you feel this earthquake?

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Community reports

Based on voluntary reports from users; not an instrumental measurement or official intensity. For official information follow AFAD and Kandilli Observatory announcements.

Impact information reported by sources

  • USGS Earthquake Hazards Program Tsunami flag: No

These values are automatic products of the respective agency, not an assessment by this platform. For tsunami warnings follow the Kandilli Observatory Regional Earthquake-Tsunami Monitoring Center and AFAD.

Nearby places

No records.

Nearby faults (50 km)

No mapped fault within 50 km.

Last year, within 100 km

52 earthquakes

By magnitude

  • M0 0
  • M1 0
  • M2 33
  • M3 15
  • M4 2
  • M5 2
  • M6 0
  • M7 0
  • M8+ 0

By depth

  • 0–10 km 48
  • 10–20 km 4
  • 20–40 km 0
  • 40–70 km 0
  • 70–150 km 0
  • 150+ km 0

Largest previous earthquakes within 100 km

Largest earthquakes in the platform catalogue and entries from historical catalogues (with citation).

Comparison with past records

…

No earlier earthquakes are recorded in this area.

  • Source:

Where does this earthquake come from?

Source comparison

Agency Magnitude Depth Time (UTC) Difference from master Original record
USGS Earthquake Hazards Program Displayed
39 km W of Mosteiros, Portugal
 5.1 mww 10.0 km 18:07:18.131 Δt 0 sn · 0 km · ΔM 0 Original record
GFZ GEOFON
Azores Islands, Portugal
 5.1 Mw 10.0 km 18:07:19.850 Δt 1.72 sn · 3.7 km · ΔM 0 Original record

This value summarises agreement between sources; it is not a measure of scientific accuracy. U.S. Geological Survey (USGS) Earthquake Hazards Program — Public domain (U.S. Government) GEOFON Program, GFZ Helmholtz Centre for Geosciences — CC BY 4.0

Revision history

  1. 20.10.2026 21:34:56 · SISTEM · recompute

    latitude: 37.925 → 37.9575 longitude: -26.268 → -26.2588 time: 2026-10-20T18:07:19.850Z → 2026-10-20 18:07:18.131+00:00 source count: 1 → 2 review status: automatic → reviewed magnitude type: Mw → mww confirming sources: gfz → usgs,gfz preferred source: 5 → 4

  2. 20.10.2026 21:34:06 · GFZ · update

    magnitude: 5.2 → 5.1 magnitude type: mb → Mw

  3. 20.10.2026 21:34:06 · SISTEM · recompute

    magnitude: 5.2 → 5.1 magnitude type: mb → Mw

  4. 20.10.2026 21:19:45 · GFZ · update

    latitude: 37.82 → 37.925 longitude: -25.269 → -26.268 magnitude: 5.1 → 5.2 time: 2026-10-20T18:07:24.740+00:00 → 2026-10-20T18:07:19.850+00:00

  5. 20.10.2026 21:19:45 · SISTEM · recompute

    latitude: 37.82 → 37.925 longitude: -25.269 → -26.268 magnitude: 5.1 → 5.2 time: 2026-10-20T18:07:24.740Z → 2026-10-20 18:07:19.850+00:00

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