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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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4.4

Mariana Islands region

9 November 2026, 01:24:04 (+03) 2026-11-08 22:24:04 UTC

2 sources: EMSC, USGS mb
Did you feel this earthquake?
Magnitude
4.4 mb
Depth
211.6 km
Coordinates
21.5743, 143.8084
Data consistency
89/100

Regional activity (100 km)

Last 24 hours
0
Last 7 days
1
Last 30 days
3

Approximate energy released

≈ 60 t TNT

2.51e+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

6 earthquakes

By magnitude

  • M0 0
  • M1 0
  • M2 0
  • M3 0
  • M4 5
  • M5 1
  • M6 0
  • M7 0
  • M8+ 0

By depth

  • 0–10 km 0
  • 10–20 km 1
  • 20–40 km 0
  • 40–70 km 0
  • 70–150 km 0
  • 150+ km 5

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
MARIANA ISLANDS REGION
 4.4 mb 217.9 km 22:24:05.650 Δt 0.93 sn · 7.74 km · ΔM 0 Original record
USGS Earthquake Hazards Program Displayed
Mariana Islands region
 4.4 mb 211.6 km 22:24:04.721 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. 09.11.2026 10:42:17 · EMSC · update

    depth: 211.6 → 217.9 latitude: 21.5743 → 21.6364 longitude: 143.8084 → 143.8427 time: 2026-11-08T22:24:04.721+00:00 → 2026-11-08T22:24:05.650+00:00

  2. 09.11.2026 04:43:02 · SISTEM · recompute

    source count: 1 → 2 confirming sources: usgs → emsc,usgs

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