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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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4.5

58 km SW of Atocha, Bolivia

23 October 2026, 05:45:41 (+03) 2026-10-23 02:45:41 UTC

2 sources: EMSC, USGS mb
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Magnitude
4.5 mb
Depth
235.8 km
Coordinates
-21.3469, -66.5795
Data consistency
89/100

Regional activity (100 km)

Last 24 hours
0
Last 7 days
0
Last 30 days
10

Approximate energy released

≈ 85 t TNT

3.55e+11 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

12 earthquakes

By magnitude

  • M0 0
  • M1 0
  • M2 0
  • M3 10
  • M4 2
  • M5 0
  • M6 0
  • M7 0
  • M8+ 0

By depth

  • 0–10 km 0
  • 10–20 km 0
  • 20–40 km 0
  • 40–70 km 0
  • 70–150 km 0
  • 150+ km 12

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
EMSC-CSEM
POTOSI, BOLIVIA
 4.5 mb 222.0 km 02:45:40.980 Δt 0.2 sn · 6.68 km · ΔM 0 Original record
USGS Earthquake Hazards Program Displayed
58 km SW of Atocha, Bolivia
 4.5 mb 235.8 km 02:45:41.183 Δt 0 sn · 0 km · ΔM 0 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)

Revision history

  1. 23.10.2026 09:46:38 · EMSC · update

    depth: 235.8 → 222 latitude: -21.3469 → -21.3344 longitude: -66.5795 → -66.5165 magnitude: 4.3 → 4.5 time: 2026-10-23T02:45:41.183+00:00 → 2026-10-23T02:45:40.980+00:00 magnitude type: m → mb

  2. 23.10.2026 06:23:01 · EMSC · update

    magnitude: 4.5 → 4.3 magnitude type: mb → m

  3. 23.10.2026 06:00:08 · SISTEM · recompute

    depth: 235.8 → 235.83 source count: 1 → 2 review status: automatic → reviewed confirming sources: emsc → emsc,usgs preferred source: 3 → 4

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