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SeadedLast update:
Time
UTC		DSCOVRACE
Solar WindGSMSolar WindGSM
Proton DensityBulk SpeedBzProton DensityBulk SpeedBz
21:05------
21:041.70455.4----
21:032.63463.9----
21:022.81466.2----
21:012.86472.6----
21:002.79472.2----
20:592.31469.7----
20:582.43471.7----
20:572.25475.3----
20:563.01482.2----
20:552.27473.7----
20:542.27474.3----
20:532.31474.9----
20:522.99482.7----
20:511.85464.8----
20:501.90469.1----
20:492.93484.7----
20:482.88483.2----
20:471.96469.5-2.0469.5-
20:461.40452.2-1.4452.2-
20:452.32469.6-2.3469.61.7
20:443.04484.5-3.0484.52.0
20:432.49484.0-2.5485.22.2
20:421.27441.6-2.3465.21.4
20:412.38475.1-2.4475.51.9
20:401.32462.0-1.8469.71.4
20:392.81475.5-2.8475.52.3
20:381.80484.9-1.8484.92.6
20:372.18491.7-2.2491.72.8
20:362.20495.7-2.2495.72.2
20:352.06494.9-2.1494.92.5
20:342.05477.4-2.1477.42.6
20:332.07468.1-2.1468.11.7
20:321.98471.5-2.0471.52.3
20:312.30468.5-2.3468.52.0
20:303.19483.0-3.2483.02.0
20:292.59506.0-2.6506.0-1.6
20:282.02485.4-2.0485.42.9
20:272.04484.7-2.0485.32.3
20:262.41471.4-1.9483.42.6
20:253.56477.4-3.6477.62.5
20:242.59467.4-2.6467.40.3
20:233.23480.1-3.2480.11.5
20:222.98477.4-3.0477.42.1
20:212.80483.7-2.8483.71.6
20:202.04478.8-2.0478.82.3
20:191.80484.6-1.8484.62.4
20:182.11482.9-2.1482.93.2
20:172.19487.4-2.2487.42.2
20:161.61485.4-1.6485.42.6
20:151.27471.6-1.3471.62.5
20:142.06501.8-2.1501.82.9
20:131.62499.2-2.1498.14.1
20:122.50488.1-2.5488.13.1
20:111.57450.6-1.6450.62.6
20:102.02473.0-2.0473.02.3
20:092.77486.3-2.8486.32.0
20:082.45480.5-2.4480.51.7
20:071.59454.6-1.6454.61.6
20:062.15468.5-2.2468.51.1
20:052.95479.8-2.9479.81.2
20:042.70478.4-2.7478.41.1
20:031.60463.0-1.6463.01.2
20:021.77462.6-1.8462.60.3
20:013.56477.5-3.6477.50.7
20:004.86484.3-4.9484.3-
19:594.06474.1-4.1474.1-
19:582.59457.6-2.6457.6-1.8
19:573.47464.1-3.5464.1-2.5
19:564.53467.5-4.5467.5-2.3
19:553.79--3.8--2.3
19:543.79466.2-3.8466.2-2.0
19:531.45450.7-1.4450.7-2.5
19:523.80466.9-3.8466.9-2.1
19:514.04465.7-4.0465.7-2.0
19:503.07464.8-3.1464.8-1.8
19:491.89461.5-1.9461.5-0.3
19:482.53467.1-2.5467.10.1
19:473.63471.9-3.6471.9-0.5
19:463.61479.1-3.6479.1-0.3
19:452.13470.3-2.1470.3-0.1
19:441.70461.3-1.7461.30.1
19:435.19479.0-5.2479.00.2
19:428.27484.0-8.3484.0-1.5
19:413.59470.8-3.6470.8-1.4
19:401.31446.4-1.3446.4-0.8
19:392.98476.8-3.0476.7-0.1
19:383.05466.7-2.9466.10.0
19:373.49483.7-3.5483.7-0.1
19:362.95469.3-1.1450.10.5
19:352.90468.0-2.1470.9-0.2
19:343.11475.8-3.1475.81.9
19:333.31476.2-3.3476.21.5
19:322.34462.4-2.3462.40.8
19:312.00459.1-2.0459.10.7
19:302.36466.0-2.4466.00.5
19:292.10479.5-2.1479.52.5
19:281.81488.6-1.8488.22.8
19:272.30483.8-2.3478.41.6
19:262.54470.9-2.5470.9-0.7
19:252.86477.5-2.9477.50.8
19:242.87476.3-2.9476.30.2
19:23-----0.9
19:22-----1.0
19:213.12478.5-3.1478.51.4
19:203.44476.3-3.4476.31.4
19:193.15483.7-3.1483.70.8
19:182.49467.0-2.5467.00.6
19:173.88467.0-3.9467.01.7
19:165.12473.5-5.1473.5-
19:154.63476.5-4.6476.5-
19:142.54460.5-2.5460.5-
19:132.14456.5-2.1456.5-0.5
19:123.36470.4-3.4470.4-1.8
19:113.36472.5-3.4472.5-1.7
19:102.55477.1-2.7469.7-1.0
19:091.79457.0-1.8457.0-0.9
19:086.38497.3-6.4497.3-0.9
19:074.70475.7-4.7475.7-1.5
19:064.11465.7-4.1465.7-2.0
Built 2026-04-22 21:06 from source
Solar wind parameters of the latest hour by NOAA
parameterminmaxmean
IMF Bz [nT]-1.64.02.0
velocity [km/s]441.6506.0477.4
density [cm-3]1.33.62.3
Geomagnetic activity (RX [nT])
sitelatest hournext hour (RXmin, RXmax)
Kevo (KEV)117295
Maasi (MAS)127291
Kilpisjärvi (KIL)167293
Ivalo (IVA)136251
Muonio (MUO)156242
Sodankylä (SOD)155206
Pello (PEL)165199
Oulujärvi (OUJ)14494
Mekrijärvi (MEK)10336
Hankasalmi (HAN)12339
Nurmijärvi (NUR)12336
Tartu (TAR)10233
low increasedmoderate high very high

Short explanation of the method

Data and licenses

AurorasNow! (Finnish Meteorological Institute)
Built 2026-04-22 21:02 from source
NAL | LYR | HOP | BJN | NOR | SOR | TRO | KEV | KIL | MEK | HAN | NUR | TAR
Issue Time: 2026-04-22 05:03 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3681
Begin Time: 2026-04-19 19:20 UTC
Yesterday Maximum 2MeV Flux: 4987 pfu

Issue Time: 2026-04-21 16:51 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5325
Valid From: 2026-04-20 08:05 UTC
Now Valid Until: 2026-04-21 23:59 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Issue Time: 2026-04-21 13:41 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3680
Begin Time: 2026-04-19 19:20 UTC
Yesterday Maximum 2MeV Flux: 1344 pfu

Issue Time: 2026-04-21 05:45 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5324
Valid From: 2026-04-20 08:05 UTC
Now Valid Until: 2026-04-21 18:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Issue Time: 2026-04-21 05:44 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2228
Valid From: 2026-04-21 01:10 UTC
Now Valid Until: 2026-04-21 15:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

Issue Time: 2026-04-21 01:53 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-04-21 01:48 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

Issue Time: 2026-04-21 01:10 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5323
Valid From: 2026-04-20 08:05 UTC
Now Valid Until: 2026-04-21 12:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Issue Time: 2026-04-21 01:10 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2026-04-21 01:10 UTC
Valid To: 2026-04-21 06:00 UTC
Warning Condition: Persistence
NOAA Scale: G1 - Minor
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

Issue Time: 2026-04-20 20:23 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3679
Begin Time: 2026-04-19 19:20 UTC
Yesterday Maximum 2MeV Flux: 1297 pfu

Issue Time: 2026-04-20T19:34:00

ALERT: Geomagnetic K-index of 5
THRESHOLD: 2026-04-20 19:34 UTC
ISSUED BY: Forecaster User
SYNOPTIC PERIOD: 1800-2100
ACTIVE WARNING: YES
NOAA SCALE: G1 - Minor
COMMENT
G1 - Minor

Issue Time: 2026-04-20T17:36:00

ALERT: Geomagnetic K-index of 5
THRESHOLD: 2026-04-20 17:34 UTC
ISSUED BY: Forecaster User
SYNOPTIC PERIOD: 1500-1800
ACTIVE WARNING: YES
NOAA SCALE: G1 - Minor
COMMENT
G1 - Minor

Issue Time: 2026-04-20T17:21:00

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5323
Valid From: 2026-04-20T08:05:00
Now Valid Until: 2026-04-21 03:00
Warning Condition: Persistence
Extended 2026-04-20 17: 21 by Forecaster User

Issue Time: 2026-04-20T17:20:00

WARNING: Geomagnetic K-index of 5 expected
ISSUED BY: Forecaster User
VALID FROM: 2026-04-20 17:20 UTC
VALID TO: 2026-04-20 23:59 UTC
WARNING CONDITIONS: Onset
NOAA SCALE: G1 - Minor
COMMENT
G1 - Minor

Issue Time: 2026-04-20 14:20 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5322
Valid From: 2026-04-20 08:05 UTC
Now Valid Until: 2026-04-20 21:00 UTC
Warning Condition: Onset
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Issue Time: 2026-04-20 08:19 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2026-04-20 08:20 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Issue Time: 2026-04-20 08:05 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026-04-20 08:05 UTC
Valid To: 2026-04-20 15:00 UTC
Warning Condition: Onset
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Built 2026-04-22 21:00 from source