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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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4.7

98 km S of Encounter Bay, Australia

27 October 2026, 00:18:11 (+03) 2026-10-26 21:18:11 UTC

3 sources: EMSC, USGS, GFZ mb
Magnitude
4.7 mb
Depth
10.0 km
Coordinates
-36.4594, 138.5321
Data consistency
94/100

Regional activity (100 km)

Last 24 hours
0
Last 7 days
0
Last 30 days
2

Approximate energy released

≈ 169 t TNT

7.08e+11 J

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

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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

2 earthquakes

By magnitude

  • M0 0
  • M1 0
  • M2 1
  • M3 0
  • M4 1
  • M5 0
  • M6 0
  • M7 0
  • M8+ 0

By depth

  • 0–10 km 1
  • 10–20 km 1
  • 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).

No records.

Comparison with past records

…

No earlier earthquakes are recorded in this area.

  • Source:

Where does this earthquake come from?

Source comparison

Sources report different values.
Agency Magnitude Depth Time (UTC) Difference from master Original record
EMSC-CSEM
NEAR COAST OF SOUTH AUSTRALIA
4.7 mb 10.0 km 21:18:11.310 Δt 0.22 sn · 3.03 km · ΔM 0 Original record
USGS Earthquake Hazards Program Displayed
98 km S of Encounter Bay, Australia
4.7 mb 10.0 km 21:18:11.526 Δt 0 sn · 0 km · ΔM 0 Original record
GFZ GEOFON
Near Coast of South Australia
5.1 mb 10.0 km 21:18:11.230 Δt 0.3 sn · 1.9 km · ΔM +0.4 Original record

This value summarises agreement between sources; it is not a measure of scientific accuracy. Euro-Mediterranean Seismological Centre (EMSC-CSEM) — CC BY 4.0 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. 27.10.2026 10:44:07 · EMSC · update

    latitude: -36.476 → -36.4556 longitude: 138.527 → 138.5656 time: 2026-10-26T21:18:11.230+00:00 → 2026-10-26T21:18:11.310+00:00

  2. 27.10.2026 00:57:29 · SISTEM · recompute

    latitude: -36.476 → -36.4594 longitude: 138.527 → 138.5321 time: 2026-10-26T21:18:11.230Z → 2026-10-26 21:18:11.526+00:00 source count: 2 → 3 review status: automatic → reviewed confirming sources: emsc,gfz → emsc,usgs,gfz preferred source: 3 → 4

  3. 27.10.2026 00:57:28 · EMSC · update

    magnitude: 5.1 → 4.7

  4. 27.10.2026 00:57:28 · SISTEM · recompute

    magnitude: 5.1 → 4.7

  5. 27.10.2026 00:28:53 · SISTEM · recompute

    source count: 1 → 2 confirming sources: gfz → emsc,gfz preferred source: 5 → 3

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