Alerts:
Space Weather Message Code: WARK04
Serial Number: 5268
Issue Time: 2026 Feb 23 0556 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5267
Valid From: 2026 Feb 21 2230 UTC
Now Valid Until: 2026 Feb 23 2359 UTC
Warning Condition: Persistence
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
Space Weather Message Code: WARK05
Serial Number: 2199
Issue Time: 2026 Feb 23 0556 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2198
Valid From: 2026 Feb 22 2154 UTC
Now Valid Until: 2026 Feb 23 1500 UTC
Warning Condition: Persistence
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
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.
Space Weather Message Code: ALTK05
Serial Number: 1970
Issue Time: 2026 Feb 23 0445 UTC
ALERT: Geomagnetic K-index of 5
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
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.
Space Weather Message Code: ALTK05
Serial Number: 1969
Issue Time: 2026 Feb 22 2202 UTC
ALERT: Geomagnetic K-index of 5
Synoptic Period: 2100-2400 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
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.
Space Weather Message Code: WARK04
Serial Number: 5267
Issue Time: 2026 Feb 22 2200 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5266
Valid From: 2026 Feb 21 2230 UTC
Now Valid Until: 2026 Feb 23 1200 UTC
Warning Condition: Persistence
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
Space Weather Message Code: WARK05
Serial Number: 2198
Issue Time: 2026 Feb 22 2154 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2026 Feb 22 2154 UTC
Valid To: 2026 Feb 23 0600 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
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.
Solar-terrestrial indices for 22 February follow.
Solar flux 110 and estimated planetary A-index 36.
The estimated planetary K-index at 0900 UTC on 23 February was 3.00.
Space weather for the past 24 hours has been minor.
Geomagnetic storms reaching the G1 level occurred.
Space weather for the next 24 hours is predicted to be minor.
Geomagnetic storms reaching the G1 level are expected.
Geo Magnetic Forecast:
NOAA Ap Index Forecast
Observed Ap 21 Feb 016
Estimated Ap 22 Feb 040
Predicted Ap 23 Feb-25 Feb 020-012-010
NOAA Geomagnetic Activity Probabilities 23 Feb-25 Feb
Active 25/35/20
Minor storm 35/20/05
Moderate storm 20/05/01
Strong-Extreme storm 05/01/01
NOAA Kp index forecast 23 Feb - 25 Feb
Feb 23 Feb 24 Feb 25
00-03UT 3.67 3.67 2.67
03-06UT 4.67 3.67 2.33
06-09UT 3.67 2.67 2.00
09-12UT 3.67 2.67 2.33
12-15UT 2.67 2.00 2.33
15-18UT 2.67 1.67 2.33
18-21UT 2.67 1.67 2.33
21-00UT 3.67 2.67 2.67
Extended Three Day Forecast:
A. NOAA Geomagnetic Activity Observation and Forecast
The greatest observed 3 hr Kp over the past 24 hours was 5 (NOAA Scale
G1).
The greatest expected 3 hr Kp for Feb 23-Feb 25 2026 is 4.67 (NOAA Scale
G1).
NOAA Kp index breakdown Feb 23-Feb 25 2026
Feb 23 Feb 24 Feb 25
00-03UT 3.67 3.67 2.67
03-06UT 4.67 (G1) 3.67 2.33
06-09UT 3.67 2.67 2.00
09-12UT 3.67 2.67 2.33
12-15UT 2.67 2.00 2.33
15-18UT 2.67 1.67 2.33
18-21UT 2.67 1.67 2.33
21-00UT 3.67 2.67 2.67
Rationale: G1 (Minor) geomagnetic storms are expected over 23 Feb due to
effects from a negative polarity coronal hole.
B. NOAA Solar Radiation Activity Observation and Forecast
Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.
Solar Radiation Storm Forecast for Feb 23-Feb 25 2026
Feb 23 Feb 24 Feb 25
S1 or greater 1% 1% 1%
Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.
C. NOAA Radio Blackout Activity and Forecast
No radio blackouts were observed over the past 24 hours.
Radio Blackout Forecast for Feb 23-Feb 25 2026
Feb 23 Feb 24 Feb 25
R1-R2 10% 10% 10%
R3 or greater 1% 1% 1%
Rationale: There exists a slight chance for R1-R2(Minor-Moderate) radio
blackouts over 23-25 Feb.
Extended Space Weather Discussion:
Solar Activity
.24 hr Summary...
Solar activity increased slightly to low levels following weak C-class
flare activity from old Region 4374 (N10, L=065) to include a C2.2 event
observed at 22/0633 UTC. A long duration C1.5 flare was observed at
22/1641 UTC from an area behind WSW limb. Aside from this minor
activity, the visible disk was spotless and relatively inactive. A 15
degree long eruptive prominence was observed at about 22/1530 UTC off
the SE limb.
.Forecast...
Solar activity is expected to be very low with a chance for C-class
flares on 23-25 Feb, and a slight chance for isolated M-class flares
(R1-R2/Minor-Moderate) over 23-25 Feb.
Energetic Particle
.24 hr Summary...
The greater than 2 MeV electron flux very briefly reached high levels
this period, but fell just short of the alert threshold. The greater
than 10 MeV proton flux was at background levels.
.Forecast...
The greater than 2 MeV electron flux is likely to reach moderate to high
levels on 23-25 Feb. The greater than 10 MeV proton flux is expected to
persist at background levels through 25 Feb.
Solar Wind
.24 hr Summary...
The solar wind environment reflected enhanced conditions following the
likely passing of a suspected embedded transient, combined with onset of
a CIR and subsequent negative polarity CH HSS. Total magnetic field
strength reached 16 nT, the Bz component ranged between +/-10 nT, and
solar wind speeds increased from around 550 km/s to the 600-700 km/s
range. The phi angle was in a predominately negative orientation.
.Forecast...
Enhanced solar wind conditions are likely to prevail over 23-24 Feb due
to persistent CIR/negative polarity CH HSS influences. Solar wind
conditions are expected to wane on 25 Feb.
Geospace
.24 hr Summary...
The geomagnetic field reached G1 (Minor) storming levels.
.Forecast...
The geomagnetic field is likely to reach G1/G2 (Minor/Moderate) storm
levels on 23 Feb, followed by likely active storm conditions on 24 Feb,
due to CIR effects and negative polarity CH HSS influences. Quiet to
unsettled levels are likely on 25 Feb as CH HSS effects wane.
27 Day Forecast:
Date | Radio Flux | Planetary A Index | Largest Kp Index
2026 Feb 16 115 20 5
2026 Feb 17 115 12 4
2026 Feb 18 110 10 3
2026 Feb 19 110 8 3
2026 Feb 20 110 5 2
2026 Feb 21 105 5 2
2026 Feb 22 120 5 2
2026 Feb 23 130 8 3
2026 Feb 24 135 20 5
2026 Feb 25 130 20 5
2026 Feb 26 130 8 3
2026 Feb 27 140 5 2
2026 Feb 28 160 5 2
2026 Mar 01 165 5 2
2026 Mar 02 170 5 2
2026 Mar 03 170 5 2
2026 Mar 04 170 5 2
2026 Mar 05 165 15 4
2026 Mar 06 165 15 4
2026 Mar 07 165 8 3
2026 Mar 08 145 5 2
2026 Mar 09 140 8 3
2026 Mar 10 130 18 5
2026 Mar 11 130 8 3
2026 Mar 12 120 12 3
2026 Mar 13 120 5 2
2026 Mar 14 120 20 5
v4.16b
v4.X Release 17th Dec 2020)
Fixed New GOES and HPI inputs from noaa for Json (17/12/20).
Addded the ability to add 2 custom Magnetometers in settings (comming soon) (18/10/19).
Improved Hobart Magnetometer code. (18/18/19)
Move all presets into their own pop out side menu. (19/06/19)
Added Composite weather maps (TAS, VIC and SA), thanks to Oz forecast! (19/06/19)
UI Upgrades, Name, Logo and Website Site Changes.
Added custom line widths for most items.
Added GOES Difference (#1 - #2)
Added Ovation-prime model outputs.
v3.8x
Various Updates, New AF Index Algo. (8/12/18)
v3.6x
Added more Presets. Disabled Presets overwriting graph views (6/7/18)
Added GeoSpace Kp Model Prediction. (3/7/18)
Added SWPC Kp Forecast + Observation. (2/7/18)
Removed WingKP and USKp. :( No longer Avaliable. (2/7/18)
Removed feed from www.dunedinaurora.nz (Unreliable). (2/7/18)
Updates to latest JQuery, JQuery Mobile and AmCharts etc. (2/7/18)
Enhanced Pro setting with Dynamic Preasure. (2/7/18)
Added Quickselect preset buttons to main page. (2/7/18)
v3.5x
Added Ruru Observatory Magnetometer. (25/4/28)
Added Forecast Sub Tabset. (1/3/18)
Added Extended Discussion Text, 27Day FC (1/3/18)
Removed Dial, and Added Forecast Report. (28/2/18)
Updated A few settings for better visilation. (28/2/18)
Updated Goes-13 is Now Goes-14 (15/2/18)
Improved Commmunity Activity for faster loads.
Consolidated Proton Density / Dynamic Preasure.
Added Additional Balloon Text.
Added TAFS Visual Probability in %.
User Interface Upgrades.
Add 'Dial' for the basics, with default support.
Added one click presets.
v2.1 - v2.49
Added 'Automatic Chart Update' option in settings.
Database caching enabled, significant load time improvements.
Extension to max 96 hours of data, up from 24.
Added ACE Bt,Bx and By for comparison.
Added More User Presets.
Fixed Orentation Change Alert.
Small layout changes.
Added Header Image.
Removed Top Header to fee up Space, Refresh added to Chart Tab.
Added Community Activity Indicator
Fixed MAG value issues in graph.
Added Second Hobart MAG Source.
Updated Comment Features (Disable).
v2.0
Fixed DSCOVR B? display bug.
Added MAG Stack Feature.
Upgrade to json feeds.
Feeds are timezone and forecast aware, making them super fast.
DB Optimisation, improved DB search times.
Charts are now zoomable, allow selection and export.
Added USAF Kp, Updated Wing Kp.
Added Ovation Aurora Short Term Forecast.
Added Macquarie Island MAG feed.
Added Mawson MAG Feed.
Added Canberra Feed.
Added MAG feed from www.dunedinaurora.nz (Portobello).
Added Brendan's experemental MAG feed (Hobart).
Fixed cookie bug, One Alert is enough for landscape mode.
> v1.0 (Started 20/10/2014)
Mawson and Macquarie Island data is copyright Commonwealth of Australia (Geoscience Australia), and redistributed under Creative Commons v4.
Thanks to INTERMAGNET for promoting high standards of magnetic observatory practice in providing access to these feeds. (www.intermagnet.org).
Local Australian weather composite maps provided by Oz Forecast