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Time
UTC		DSCOVRACE
Solar WindGSMSolar WindGSM
Proton DensityBulk SpeedBzProton DensityBulk SpeedBz
21:02------
21:01------
21:003.24624.5-3.13---
20:591.04610.9----
20:58------
20:573.11645.8-2.83---
20:563.03645.8-3.38---
20:552.77645.9-3.79---
20:542.33633.3----
20:532.33633.3-0.66---
20:522.44631.4-1.04---
20:512.44-----
20:50------
20:492.49638.20.06---
20:482.13628.50.26---
20:472.00625.2-1.35---
20:46------
20:451.86642.8-2.69---
20:441.95648.8-2.442.0648.8-2.4
20:432.05655.2-2.1655.2-
20:42------
20:411.95677.20.111.9677.20.1
20:401.94675.20.131.9675.20.1
20:391.92668.2-1.9668.2-
20:381.36638.4-1.4638.4-
20:371.37639.20.261.4639.20.3
20:361.93684.51.471.9684.51.5
20:351.86676.51.921.9676.51.9
20:341.86676.1-1.9676.1-
20:331.47665.60.441.5665.60.4
20:321.47665.60.261.5665.60.3
20:31------
20:30------
20:292.75675.9-2.322.8675.9-2.3
20:282.42673.9-3.852.4673.9-3.8
20:272.06671.7-2.1671.7-
20:261.32606.6-1.3606.6-
20:251.57619.2-4.351.6619.2-4.3
20:242.32647.2-4.062.3647.2-4.1
20:232.76632.6-2.8632.6-
20:221.06606.4-1.1606.4-
20:211.08607.0-2.321.1607.0-2.3
20:202.68643.4-1.372.7643.4-1.4
20:192.68--2.7--
20:18------
20:172.60627.4-1.542.6627.4-1.5
20:161.81655.6-1.351.8655.6-1.3
20:151.55665.0-1.5665.0-
20:14------
20:132.98626.4-3.0626.4-
20:122.69639.7-2.7639.7-
20:112.39653.9-2.4653.9-
20:10------
20:090.86632.1-4.350.9632.1-4.4
20:081.03637.30.281.0637.30.3
20:071.64656.2-1.531.6656.2-1.5
20:061.34650.3-1.3650.3-
20:051.33650.3-2.081.3650.3-2.1
20:040.98646.7-2.291.0646.7-2.3
20:031.47639.5-1.5639.5-
20:021.50639.1-1.5639.1-
20:011.30635.1-2.511.3635.1-2.5
20:001.76649.6-2.181.8649.6-2.2
19:591.92654.4-2.731.9654.4-2.7
19:58------
19:570.98618.3-2.881.0618.3-2.9
19:561.06634.9-3.361.1634.9-3.4
19:551.16652.6-1.2652.6-
19:54------
19:530.95615.6-3.391.0615.6-3.4
19:521.03624.4-3.281.0624.4-3.3
19:511.31656.2-1.3656.2-
19:501.64658.2-1.6658.2-
19:491.68657.6-2.431.7657.6-2.4
19:484.00627.1-1.654.0627.1-1.6
19:474.00--4.0--
19:46------
19:453.20638.9-0.143.2638.9-0.1
19:441.91619.20.181.9619.20.2
19:431.48612.7-1.5612.7-
19:42------
19:412.09630.90.332.1630.90.3
19:402.24630.90.382.2630.90.4
19:392.41630.90.712.4630.90.7
19:38------
19:372.93647.6-0.182.9647.6-0.2
19:362.93647.6-0.282.9647.6-0.3
19:35------
19:343.05668.7-3.0668.7-
19:333.01667.7-0.823.0667.7-0.8
19:320.80604.5-0.350.8604.5-0.3
19:311.92640.6-1.9640.6-
19:301.98642.5-2.0642.5-
19:292.44669.5-0.272.4669.5-0.3
19:281.94631.9-2.201.9631.9-2.2
19:271.97640.9-1.272.0640.9-1.3
19:262.07650.9-2.1650.9-
19:251.62673.2-3.601.6673.2-3.6
19:241.57663.4-3.611.6663.4-3.6
19:231.52652.9-1.5652.9-
19:22------
19:212.12661.91.432.1661.91.4
19:202.03659.00.992.0659.01.0
19:191.70648.3-1.7648.3-
19:182.24670.3-2.2670.3-
19:172.24670.2-0.802.2670.2-0.8
19:162.05666.80.642.1666.80.6
19:152.05--2.1--
19:14------
19:132.07660.61.762.1660.61.8
19:121.17632.00.481.2632.00.5
19:110.87622.5-0.9622.5-
19:10------
19:091.72682.00.131.7682.00.1
19:081.46689.80.011.5689.80.0
19:071.18698.1-1.461.2698.1-1.5
19:06------
19:051.71719.7-0.291.7719.7-0.3
19:041.71719.70.231.7719.70.2
19:03------
Built 2025-12-24 21:03 from source

No recent solar wind parameters by NOAA available.
Forecast cannot be given.

Geomagnetic activity (RX [nT])
sitelatest hournext hour (RXmin, RXmax)
Kevo (KEV)139--
Maasi (MAS)152--
Kilpisjärvi (KIL)169--
Ivalo (IVA)195--
Muonio (MUO)179--
Sodankylä (SOD)134--
Pello (PEL)132--
Oulujärvi (OUJ)32--
Mekrijärvi (MEK)23--
Hankasalmi (HAN)21--
Nurmijärvi (NUR)24--
Tartu (TAR)24--
low increasedmoderate high very high

Short explanation of the method

Data and licenses

AurorasNow! (Finnish Meteorological Institute)
Built 2025-12-24 21:02 from source
NAL | LYR | HOP | BJN | NOR | SOR | TRO | KEV | KIL | MEK | HAN | NUR | TAR
Issue Time: 2025-12-24 20:52 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5196
Valid From: 2025-12-21 02:40 UTC
Now Valid Until: 2025-12-25 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: 2025-12-24 08:49 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2163
Valid From: 2025-12-22 14:07 UTC
Now Valid Until: 2025-12-24 18:00 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: 2025-12-24 08:48 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5195
Valid From: 2025-12-21 02:40 UTC
Now Valid Until: 2025-12-24 21:00 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: 2025-12-24 05:06 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3582
Begin Time: 2025-12-21 14:25 UTC
Yesterday Maximum 2MeV Flux: 5557 pfu

Issue Time: 2025-12-23 23:08 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2162
Valid From: 2025-12-22 14:07 UTC
Now Valid Until: 2025-12-24 09:00 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: 2025-12-23 23:07 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5194
Valid From: 2025-12-21 02:40 UTC
Now Valid Until: 2025-12-24 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: 2025-12-23 14:09 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2161
Valid From: 2025-12-22 14:07 UTC
Now Valid Until: 2025-12-23 23:59 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: 2025-12-23 09:02 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3581
Begin Time: 2025-12-21 14:25 UTC
Yesterday Maximum 2MeV Flux: 1882 pfu

Issue Time: 2025-12-23 05:55 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2160
Valid From: 2025-12-22 14:07 UTC
Now Valid Until: 2025-12-23 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: 2025-12-22 23:54 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2159
Valid From: 2025-12-22 14:07 UTC
Now Valid Until: 2025-12-23 06:00 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: 2025-12-22 17:55 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5193
Valid From: 2025-12-21 02:40 UTC
Now Valid Until: 2025-12-23 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: 2025-12-22 15:00 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3580
Begin Time: 2025-12-21 14:25 UTC
Yesterday Maximum 2MeV Flux: 1566 pfu

Issue Time: 2025-12-22 14:10 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-12-22 14:10 UTC
Synoptic Period: 1200-1500 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: 2025-12-22 14:07 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025-12-22 14:07 UTC
Valid To: 2025-12-22 23:59 UTC
Warning Condition: Onset
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: 2025-12-21 23:16 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-12-21 23:14 UTC
Synoptic Period: 2100-2400 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.

Built 2025-12-24 20:55 from source