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Time
UTC		DSCOVRACE
Solar WindGSMSolar WindGSM
Proton DensityBulk SpeedBzProton DensityBulk SpeedBz
23:05------
23:04------
23:034.23550.8-4.47---
23:023.97547.6-4.02---
23:014.34546.4-4.05---
23:005.73553.2-4.04---
22:594.67547.8-4.49---
22:584.88549.9-5.16---
22:574.85549.2-5.09---
22:563.21540.9-4.94---
22:554.81548.3-4.94---
22:541.89538.8-5.48---
22:532.68539.9-5.32---
22:522.81542.5-5.17---
22:512.81543.0-4.73---
22:502.31537.2-4.72---
22:492.36537.2-4.80---
22:482.61538.7-4.832.6538.7-4.8
22:473.21545.4-5.353.2545.4-5.3
22:463.23547.6-5.523.2547.6-5.5
22:452.69542.0-5.452.7542.0-5.5
22:442.73540.4-5.422.7540.4-5.4
22:432.78541.2-5.402.8541.2-5.4
22:422.17540.9-5.422.2540.9-5.4
22:412.23540.9-5.302.2540.9-5.3
22:402.73540.6-5.482.7540.6-5.5
22:392.38541.2-5.142.4541.2-5.1
22:381.47533.9-5.161.5533.9-5.2
22:373.55551.7-5.403.5551.7-5.4
22:360.98530.5-5.221.0530.5-5.2
22:351.32535.3-4.741.3535.3-4.7
22:342.07538.0-5.082.1538.0-5.1
22:332.30539.5-5.002.3539.5-5.0
22:322.37540.4-5.282.4540.4-5.3
22:313.00545.6-5.143.0545.6-5.1
22:303.80551.0-4.983.8551.0-5.0
22:292.62537.1-4.722.6537.1-4.7
22:280.70521.7-5.240.7521.7-5.2
22:272.19542.0-6.002.2542.0-6.0
22:262.20542.1-6.242.2542.1-6.2
22:252.40541.5-6.022.4541.5-6.0
22:242.24542.7-5.412.2542.7-5.4
22:232.30541.8-4.972.3541.8-5.0
22:224.27553.3-5.334.3553.3-5.3
22:210.83584.1-5.180.8584.1-5.2
22:201.45564.1-4.831.5564.1-4.8
22:192.27546.4-4.842.3546.4-4.8
22:1810.62526.0-5.3010.6526.0-5.3
22:176.69535.5-3.536.7535.5-3.5
22:162.65544.7-5.452.7544.7-5.4
22:152.16540.8-3.382.2540.8-3.4
22:141.24633.9-5.391.2633.9-5.4
22:131.35679.8-5.371.4679.8-5.4
22:122.04540.7-5.302.0540.7-5.3
22:1119.13632.2-6.6919.1632.2-6.7
22:1019.13632.2-5.5719.1632.2-5.6
22:096.65572.2-6.106.6572.2-6.1
22:086.62572.1-5.346.6572.1-5.3
22:075.84569.2-4.915.8569.2-4.9
22:063.16546.2-5.203.2546.2-5.2
22:052.19542.4-5.462.2542.4-5.5
22:042.74516.1-4.732.7516.1-4.7
22:032.86539.5-4.722.9539.5-4.7
22:023.69551.9-4.963.7551.9-5.0
22:013.20550.1-6.713.2550.1-6.7
22:002.70548.1-6.252.7548.1-6.3
21:59------
21:585.52567.8-6.175.5567.8-6.2
21:5710.24565.3-6.4410.2565.3-6.4
21:5615.32518.8-5.5115.3518.8-5.5
21:5517.58558.5-5.6617.6558.5-5.7
21:5410.07648.4-5.7810.1648.4-5.8
21:53---5.50---5.5
21:52---6.15---6.2
21:51---6.85---6.8
21:504.72569.6-6.644.7569.6-6.6
21:493.39552.2-6.573.4552.2-6.6
21:484.26557.8-6.124.3557.8-6.1
21:473.38551.3-6.273.4551.3-6.3
21:464.78578.4-2.334.8578.4-2.3
21:454.74566.5-5.744.7566.5-5.7
21:444.29552.3-5.754.3552.3-5.8
21:43---5.79---5.8
21:423.80554.4-5.643.8554.4-5.6
21:413.62553.0-4.863.6553.0-4.9
21:403.79553.8-4.993.8553.8-5.0
21:394.92558.9-4.704.9558.9-4.7
21:385.07553.0-4.425.1553.0-4.4
21:375.72558.7-6.485.7558.7-6.5
21:365.38--6.745.4--6.7
21:355.38550.8-6.635.4550.8-6.6
21:344.09547.1-6.274.1547.1-6.3
21:330.43518.0-5.790.4518.0-5.8
21:322.58542.5-5.422.6542.5-5.4
21:314.11552.3-5.814.1552.3-5.8
21:301.97541.2-5.192.0541.2-5.2
21:292.33544.9-4.502.3544.9-4.5
21:282.94549.7-3.862.9549.7-3.9
21:273.08551.2-3.523.1551.2-3.5
21:261.94541.1-4.141.9541.1-4.1
21:251.08534.5-4.421.1534.5-4.4
21:243.70555.3-4.543.7555.3-4.5
21:235.38564.5-4.945.4564.5-4.9
21:224.09554.1-5.014.1554.1-5.0
21:214.88557.3-4.794.9557.3-4.8
21:209.51588.4-5.239.5588.4-5.2
21:194.02554.0-4.724.0554.0-4.7
21:184.55554.9-5.344.5554.9-5.3
21:1711.96552.3-5.3212.0552.3-5.3
21:167.75559.4-5.287.7559.4-5.3
21:152.17542.2-5.032.2542.2-5.0
21:142.06546.7-5.912.1546.7-5.9
21:13---6.16---6.2
21:12---1.30---1.3
21:11---5.50---5.5
21:10---6.16---6.2
21:093.04548.7-6.393.0548.7-6.4
21:082.77543.3-5.042.8543.3-5.0
21:072.76540.0-6.322.8540.0-6.3
21:063.77546.6-5.973.8546.6-6.0
Built 2025-09-02 23:06 from source
Solar wind parameters of the latest hour by NOAA
parameterminmaxmean
IMF Bz [nT]-6.7-3.4-5.3
velocity [km/s]516.1679.8551.4
density [cm-3]0.719.13.7
Geomagnetic activity (RX [nT])
sitelatest hournext hour (RXmin, RXmax)
Kevo (KEV)229140786
Maasi (MAS)177131795
Kilpisjärvi (KIL)-176759
Ivalo (IVA)138160697
Muonio (MUO)-211811
Sodankylä (SOD)140212820
Pello (PEL)150234773
Oulujärvi (OUJ)300127508
Mekrijärvi (MEK)21823138
Hankasalmi (HAN)18345324
Nurmijärvi (NUR)10330185
Tartu (TAR)671883
low increasedmoderate high very high

Short explanation of the method

Data and licenses

AurorasNow! (Finnish Meteorological Institute)
Built 2025-09-02 23:02 from source
NAL | LYR | HOP | BJN | NOR | SOR | TRO | KEV | KIL | MEK | HAN | NUR | TAR
Issue Time: 2025-09-02 20:48 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-09-02 20:47 UTC
Synoptic Period: 1800-2100 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: 2025-09-02 17:01 UTC
WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2025-09-02 16:55 UTC
Valid To: 2025-09-02 23:59 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

Issue Time: 2025-09-02 17:01 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2090
Valid From: 2025-09-01 20:41 UTC
Now Valid Until: 2025-09-03 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: 2025-09-02 16:59 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5067
Valid From: 2025-09-01 20:40 UTC
Now Valid Until: 2025-09-03 09:00 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: 2025-09-02 16:57 UTC
WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day
Sep 03: G1 (Minor) Sep 04: None (Below G1) Sep 05: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Comment: Lingering CME effects are likely to cause periods of G1 (Minor) geomagnetic storming on 03 Sep.
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: 2025-09-02 01:06 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-09-02 01:01 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: 2025-09-01 22:41 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025-09-01 22:36 UTC
Synoptic Period: 2100-2400 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

Issue Time: 2025-09-01 21:22 UTC
SUMMARY: Geomagnetic Sudden Impulse
Observed: 2025-09-01 21:01 UTC
Deviation: 58 nT
Station: CNB

Issue Time: 2025-09-01 21:08 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025-09-01 21:03 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.

Issue Time: 2025-09-01 21:08 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2025-09-01 21:01 UTC
Synoptic Period: 2100-2400 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: 2025-09-01 21:08 UTC
WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2025-09-01 21:07 UTC
Valid To: 2025-09-02 14:59 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

Issue Time: 2025-09-01 20:44 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025-09-01 20:41 UTC
Valid To: 2025-09-02 20:59 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
Comment: Minor geomagnetic storming due to arrival of the 30 Aug CME is expected to commence and persist through the majority of 02 Sep.
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: 2025-09-01 20:41 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025-09-01 20:40 UTC
Valid To: 2025-09-02 23:59 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: 2025-09-01 20:39 UTC
WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2025-09-01 20:45 UTC
Valid To: 2025-09-01 21:45 UTC
IP Shock Passage Observed: 2025-09-01 20:30 UTC

Issue Time: 2025-09-01 09:34 UTC
WARNING: Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2025-09-01 09:30 UTC
Valid To: 2025-09-01 23:59 UTC
Warning Condition: Onset
Predicted NOAA Scale: S1 - Minor

Issue Time: 2025-08-31 04:58 UTC
WATCH: Geomagnetic Storm Category G3 Predicted
Highest Storm Level Predicted by Day
Aug 31: None (Below G1) Sep 01: G2 (Moderate) Sep 02: G3 (Strong)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

Built 2025-09-02 20:50 from source