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GPS / GNSS interference — Gulf of Finland & Estonia

Estonia and southern Finland have reported frequent GPS disruption, including effects on approaches to regional airports close to the Russian border.

Last 24 hours: High · data up to · updated hourly

15%of area-hours with interference in the last 24 h (267 observed)
106of 117 areas affected in the last 7 days (72 severe)
99%highest share of affected aircraft in one area (7 days)
24aircraft with spoofing indications in the last 7 days (29 events)

Affected areas — last 7 days

Share of aircraft with degraded GNSS:2–5.0%5–10.0%10–20.0%20–35.0%35–50.0%50%+

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Daily trend — last 30 days

Share of observed area-hours in which a notable share of aircraft reported degraded GNSS (≥ 2% of aircraft; dark part ≥ 10%).

0%37.5%75%2026-10-04: 31% of 321 area-hours affected (92 severe)2026-10-05: 23% of 367 area-hours affected (78 severe)Mon 5 Oct2026-10-06: 31% of 324 area-hours affected (90 severe)2026-10-07: 24% of 337 area-hours affected (72 severe)2026-10-08: 60% of 265 area-hours affected (153 severe)2026-10-09: 35% of 345 area-hours affected (113 severe)2026-10-10: 25% of 265 area-hours affected (64 severe)2026-10-11: 36% of 320 area-hours affected (111 severe)2026-10-12: 27% of 360 area-hours affected (86 severe)Mon 12 Oct2026-10-13: 22% of 317 area-hours affected (63 severe)2026-10-14: 27% of 322 area-hours affected (76 severe)2026-10-15: 24% of 351 area-hours affected (80 severe)2026-10-16: 18% of 280 area-hours affected (47 severe)2026-10-17: 29% of 231 area-hours affected (61 severe)2026-10-18: 37% of 268 area-hours affected (82 severe)2026-10-19: 23% of 323 area-hours affected (68 severe)Mon 19 Oct2026-10-20: 31% of 283 area-hours affected (77 severe)2026-10-21: 25% of 299 area-hours affected (72 severe)2026-10-22: 24% of 338 area-hours affected (77 severe)2026-10-23: 22% of 314 area-hours affected (63 severe)2026-10-24: 29% of 258 area-hours affected (71 severe)2026-10-25: 24% of 268 area-hours affected (55 severe)2026-10-26: 17% of 345 area-hours affected (50 severe)Mon 26 Oct2026-10-27: 19% of 308 area-hours affected (56 severe)2026-10-28: 26% of 292 area-hours affected (69 severe)2026-10-29: 21% of 315 area-hours affected (65 severe)2026-10-30: 22% of 289 area-hours affected (58 severe)2026-10-31: 17% of 248 area-hours affected (43 severe)2026-11-01: 20% of 229 area-hours affected (42 severe)2026-11-02: 8.9% of 101 area-hours affected (8 severe)Mon 2 Nov

Most affected day in this period: Thu 8 Oct (60% of area-hours severely affected).

Day (UTC)Area-hoursAffectedSevereAircraft-hours
Mon 2 Nov1019 (8.9%)82,579
Sun 1 Nov22946 (20%)427,254
Sat 31 Oct24843 (17%)437,071
Fri 30 Oct28963 (22%)587,471
Thu 29 Oct31567 (21%)657,852
Wed 28 Oct29277 (26%)697,732
Tue 27 Oct30860 (19%)567,652

How to read these figures

The region is divided into hexagonal areas of about 1,770 km². For every hour, the monitor checks which share of the aircraft in each area reported degraded GNSS integrity (NIC) via ADS-B. An area-hour counts as affected when that share exceeds the threshold and enough aircraft were present. Spoofing indications are impossible position jumps and large GNSS/barometric altitude differences. These are heuristic indicators — see how the map works for details and limitations.

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