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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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4.0

249 km NE of Nagqu, China

28 October 2026, 20:48:18 (+03) 2026-10-28 17:48:18 UTC

2 sources: EMSC, USGS mb
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Magnitude
4.0 mb
Depth
10.0 km
Coordinates
32.7514, 94.2416
Data consistency
90/100

Regional activity (100 km)

Last 24 hours
0
Last 7 days
3
Last 30 days
55

Approximate energy released

≈ 15 t TNT

6.31e+10 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

55 earthquakes

By magnitude

  • M0 0
  • M1 0
  • M2 0
  • M3 19
  • M4 29
  • M5 6
  • M6 0
  • M7 1
  • M8+ 0

By depth

  • 0–10 km 2
  • 10–20 km 53
  • 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
EMSC-CSEM
XIZANG-QINGHAI BORDER REGION
 4.0 mb 10.0 km 17:48:18.037 Δt 0 sn · 0 km · ΔM 0 Original record
USGS Earthquake Hazards Program Displayed
249 km NE of Nagqu, China
 4.0 mb 10.0 km 17:48:18.037 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. 29.10.2026 00:16:55 · SISTEM · recompute

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

  2. 29.10.2026 00:16:54 · EMSC · update

    depth: 15 → 10 latitude: 32.656 → 32.7514 longitude: 94.064 → 94.2416 magnitude: 4.5 → 4 time: 2026-10-28T17:48:25.000+00:00 → 2026-10-28T17:48:18.037+00:00 magnitude type: m → mb

  3. 29.10.2026 00:16:54 · SISTEM · recompute

    depth: 15 → 10 latitude: 32.656 → 32.7514 longitude: 94.064 → 94.2416 magnitude: 4.5 → 4 time: 2026-10-28T17:48:25.000Z → 2026-10-28 17:48:18.037+00:00 magnitude type: m → mb

  4. 28.10.2026 21:15:14 · EMSC · update

    depth: 10 → 15 latitude: 30.1463 → 32.656 longitude: 93.27 → 94.064 magnitude: 3.8 → 4.5 time: 2026-10-28T17:48:56.000+00:00 → 2026-10-28T17:48:25.000+00:00 location: EASTERN XIZANG → XIZANG-QINGHAI BORDER REGION

  5. 28.10.2026 21:15:14 · SISTEM · recompute

    depth: 10 → 15 latitude: 30.1463 → 32.656 longitude: 93.27 → 94.064 magnitude: 3.8 → 4.5 time: 2026-10-28T17:48:56.000Z → 2026-10-28 17:48:25.000+00:00

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