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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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4.9

40 km ESE of Hualien City, Taiwan

23 October 2026, 23:58:01 (+03) 2026-10-23 20:58:01 UTC

2 sources: EMSC, USGS mb
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Magnitude
4.9 mb
Depth
10.0 km
Coordinates
23.7861, 121.9479
Data consistency
90/100

Regional activity (100 km)

Last 24 hours
0
Last 7 days
1
Last 30 days
8

Approximate energy released

≈ 338 t TNT

1.41e+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

9 earthquakes

By magnitude

  • M0 0
  • M1 0
  • M2 0
  • M3 1
  • M4 8
  • M5 0
  • M6 0
  • M7 0
  • M8+ 0

By depth

  • 0–10 km 0
  • 10–20 km 4
  • 20–40 km 3
  • 40–70 km 1
  • 70–150 km 1
  • 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
TAIWAN
 4.9 mb 17.8 km 20:58:02.350 Δt 0.86 sn · 5.3 km · ΔM 0 Original record
USGS Earthquake Hazards Program Displayed
40 km ESE of Hualien City, Taiwan
 4.9 mb 10.0 km 20:58:01.491 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. 26.10.2026 10:41:40 · EMSC · update

    depth: 18 → 17.8 latitude: 23.8655 → 23.8295 longitude: 121.9063 → 121.9698 magnitude: 4.6 → 4.9 time: 2026-10-23T20:58:03.530+00:00 → 2026-10-23T20:58:02.350+00:00 magnitude type: ml → mb

  2. 24.10.2026 18:31:33 · SISTEM · recompute

    depth: 18 → 10 latitude: 23.8655 → 23.7861 longitude: 121.9063 → 121.9479 magnitude: 4.6 → 4.9 time: 2026-10-23T20:58:03.530Z → 2026-10-23 20:58:01.491+00:00 source count: 1 → 2 review status: automatic → reviewed magnitude type: ml → mb confirming sources: emsc → emsc,usgs preferred source: 3 → 4

  3. 24.10.2026 10:17:45 · EMSC · update

    depth: 16.7 → 18 latitude: 23.89 → 23.8655 longitude: 121.9 → 121.9063 time: 2026-10-23T20:58:03.800+00:00 → 2026-10-23T20:58:03.530+00:00

  4. 24.10.2026 10:17:45 · SISTEM · recompute

    depth: 16.7 → 18 latitude: 23.89 → 23.8655 longitude: 121.9 → 121.9063 time: 2026-10-23T20:58:03.800Z → 2026-10-23 20:58:03.530+00:00

  5. 24.10.2026 00:11:28 · EMSC · update

    magnitude: 4.8 → 4.6

  6. 24.10.2026 00:11:28 · SISTEM · recompute

    magnitude: 4.8 → 4.6

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