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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

119 km SSW of Merizo Village, Guam

16 October 2026, 14:57:19 (+03) 2026-10-16 11:57:19 UTC

3 sources: EMSC, USGS, GFZ mb
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Magnitude
4.9 mb
Depth
10.0 km
Coordinates
12.3280, 144.1189
Data consistency
98/100

Regional activity (100 km)

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

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

4 earthquakes

By magnitude

  • M0 0
  • M1 0
  • M2 0
  • M3 0
  • M4 4
  • M5 0
  • M6 0
  • M7 0
  • M8+ 0

By depth

  • 0–10 km 0
  • 10–20 km 1
  • 20–40 km 0
  • 40–70 km 2
  • 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
GUAM REGION
 4.9 mb 10.0 km 11:57:20.430 Δt 0.59 sn · 5.83 km · ΔM 0 Original record
USGS Earthquake Hazards Program Displayed
119 km SSW of Merizo Village, Guam
 4.9 mb 10.0 km 11:57:19.839 Δt 0 sn · 0 km · ΔM 0 Original record
GFZ GEOFON
South of Mariana Islands
 5.0 mb 10.0 km 11:57:20.870 Δt 1.03 sn · 3.68 km · ΔM +0.1 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. 16.10.2026 21:05:18 · SISTEM · recompute

    latitude: 12.3748 → 12.328 longitude: 144.1435 → 144.1189 time: 2026-10-16T11:57:20.430Z → 2026-10-16 11:57:19.839+00:00 source count: 2 → 3 review status: automatic → reviewed confirming sources: emsc,gfz → emsc,usgs,gfz preferred source: 3 → 4

  2. 16.10.2026 16:17:45 · EMSC · update

    latitude: 12.41 → 12.3748 longitude: 144.16 → 144.1435 time: 2026-10-16T11:57:21.500+00:00 → 2026-10-16T11:57:20.430+00:00

  3. 16.10.2026 16:17:45 · SISTEM · recompute

    latitude: 12.41 → 12.3748 longitude: 144.16 → 144.1435 time: 2026-10-16T11:57:21.500Z → 2026-10-16 11:57:20.430+00:00

  4. 16.10.2026 15:43:17 · GFZ · update

    latitude: 12.333 → 12.354 longitude: 144.135 → 144.14

  5. 16.10.2026 15:33:48 · EMSC · update

    latitude: 12.328 → 12.41 longitude: 144.1189 → 144.16 time: 2026-10-16T11:57:19.839+00:00 → 2026-10-16T11:57:21.500+00:00

  6. 16.10.2026 15:33:48 · SISTEM · recompute

    latitude: 12.328 → 12.41 longitude: 144.1189 → 144.16 time: 2026-10-16T11:57:19.839Z → 2026-10-16 11:57:21.500+00:00

  7. 16.10.2026 15:17:00 · SISTEM · recompute

    latitude: 12.333 → 12.328 longitude: 144.135 → 144.1189 magnitude: 5 → 4.9 time: 2026-10-16T11:57:20.870Z → 2026-10-16 11:57:19.839+00:00 source count: 1 → 2 confirming sources: gfz → emsc,gfz preferred source: 5 → 3

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