Alerts:
Space Weather Message Code: SUMXM5
Serial Number: 312
Issue Time: 2026 Apr 04 0146 UTC
SUMMARY: X-ray Event exceeded M5
Begin Time: 2026 Apr 04 0107 UTC
Maximum Time: 2026 Apr 04 0117 UTC
End Time: 2026 Apr 04 0123 UTC
X-ray Class: M7.5
Location: N04W04
NOAA Scale: R2 - Moderate
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.
Space Weather Message Code: ALTXMF
Serial Number: 522
Issue Time: 2026 Apr 04 0117 UTC
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2026 Apr 04 0117 UTC
NOAA Scale: R2 - Moderate
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.
Space Weather Message Code: ALTK06
Serial Number: 712
Issue Time: 2026 Apr 03 2310 UTC
ALERT: Geomagnetic K-index of 6
Synoptic Period: 2100-2400 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
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.
Space Weather Message Code: WARK06
Serial Number: 653
Issue Time: 2026 Apr 03 2310 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 652
Valid From: 2026 Apr 03 1551 UTC
Now Valid Until: 2026 Apr 04 0600 UTC
Warning Condition: Persistence
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
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.
Space Weather Message Code: ALTK05
Serial Number: 2005
Issue Time: 2026 Apr 03 2141 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: 5310
Issue Time: 2026 Apr 03 2102 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5309
Valid From: 2026 Apr 02 0047 UTC
Now Valid Until: 2026 Apr 04 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: 2222
Issue Time: 2026 Apr 03 2101 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2221
Valid From: 2026 Apr 02 0230 UTC
Now Valid Until: 2026 Apr 04 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: ALTK06
Serial Number: 711
Issue Time: 2026 Apr 03 2101 UTC
ALERT: Geomagnetic K-index of 6
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
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.
Space Weather Message Code: ALTK05
Serial Number: 2004
Issue Time: 2026 Apr 03 1908 UTC
ALERT: Geomagnetic K-index of 5
Synoptic Period: 1800-2100 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: ALTK07
Serial Number: 216
Issue Time: 2026 Apr 03 1647 UTC
ALERT: Geomagnetic K-index of 7
Synoptic Period: 1500-1800 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
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.
Space Weather Message Code: WARK07
Serial Number: 148
Issue Time: 2026 Apr 03 1625 UTC
WARNING: Geomagnetic K-index of 7 or greater expected
Valid From: 2026 Apr 03 1625 UTC
Valid To: 2026 Apr 03 2359 UTC
Warning Condition: Onset
NOAA Scale: G3 or greater
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
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.
Space Weather Message Code: ALTK06
Serial Number: 710
Issue Time: 2026 Apr 03 1555 UTC
ALERT: Geomagnetic K-index of 6
Synoptic Period: 1500-1800 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
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.
Space Weather Message Code: WARK06
Serial Number: 652
Issue Time: 2026 Apr 03 1552 UTC
WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2026 Apr 03 1551 UTC
Valid To: 2026 Apr 03 2359 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
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.
Space Weather Message Code: SUMSUD
Serial Number: 298
Issue Time: 2026 Apr 03 1545 UTC
SUMMARY: Geomagnetic Sudden Impulse
Observed: 2026 Apr 03 1529 UTC
Deviation: 72 nT
Station: HAD
www.swpc.noaa.gov/noaa-scales-explanation
Space Weather Message Code: ALTK05
Serial Number: 2003
Issue Time: 2026 Apr 03 1542 UTC
ALERT: Geomagnetic K-index of 5
Synoptic Period: 1500-1800 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: WARSUD
Serial Number: 253
Issue Time: 2026 Apr 03 1529 UTC
WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2026 Apr 03 1529 UTC
Valid To: 2026 Apr 03 1550 UTC
IP Shock Passage Observed: 2026 Apr 03 1503 UTC
www.swpc.noaa.gov/noaa-scales-explanation
Space Weather Message Code: WARK05
Serial Number: 2221
Issue Time: 2026 Apr 03 1451 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2220
Valid From: 2026 Apr 02 0230 UTC
Now Valid Until: 2026 Apr 03 2359 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: ALTEF3
Serial Number: 3664
Issue Time: 2026 Apr 03 0936 UTC
ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2026 Apr 03 0920 UTC
Station: GOES19
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
Space Weather Message Code: ALTK05
Serial Number: 2002
Issue Time: 2026 Apr 03 0831 UTC
ALERT: Geomagnetic K-index of 5
Synoptic Period: 0600-0900 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.
Solar-terrestrial indices for 03 April follow.
Solar flux 136 and estimated planetary A-index 49.
The estimated planetary K-index at 0000 UTC on 04 April was 5.67.
Space weather for the past 24 hours has been moderate.
Geomagnetic storms reaching the G2 level occurred.
Radio blackouts reaching the R1 level occurred.
Space weather for the next 24 hours is predicted to be moderate.
Geomagnetic storms reaching the G2 level are expected.
Radio blackouts reaching the R2 level are likely.
Geo Magnetic Forecast:
NOAA Ap Index Forecast
Observed Ap 02 Apr 043
Estimated Ap 03 Apr 054
Predicted Ap 04 Apr-06 Apr 037-018-012
NOAA Geomagnetic Activity Probabilities 04 Apr-06 Apr
Active 15/30/35
Minor storm 30/35/20
Moderate storm 35/15/05
Strong-Extreme storm 20/05/01
NOAA Kp index forecast 04 Apr - 06 Apr
Apr 04 Apr 05 Apr 06
00-03UT 5.00 4.67 2.67
03-06UT 5.67 4.00 3.00
06-09UT 5.00 3.67 3.67
09-12UT 4.00 3.00 2.67
12-15UT 4.67 2.67 2.67
15-18UT 4.00 2.67 1.67
18-21UT 3.00 1.67 1.67
21-00UT 4.00 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 7 (NOAA Scale
G3).
The greatest expected 3 hr Kp for Apr 04-Apr 06 2026 is 5.67 (NOAA Scale
G2).
NOAA Kp index breakdown Apr 04-Apr 06 2026
Apr 04 Apr 05 Apr 06
00-03UT 5.00 (G1) 4.67 (G1) 2.67
03-06UT 5.67 (G2) 4.00 3.00
06-09UT 5.00 (G1) 3.67 3.67
09-12UT 4.00 3.00 2.67
12-15UT 4.67 (G1) 2.67 2.67
15-18UT 4.00 2.67 1.67
18-21UT 3.00 1.67 1.67
21-00UT 4.00 2.67 2.67
Rationale: G1-G2 (Minor-Moderate) storm levels are likely over 04 Apr
due to combined effects of a CME that left the Sun on 01 Apr and
influence from a negative polarity CH HSS. G1 (Minor) conditions
are likely on 05 Apr as negative polarity CH HSS influences wane and any
remnant CME enhancements subside.
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 Apr 04-Apr 06 2026
Apr 04 Apr 05 Apr 06
S1 or greater 15% 15% 15%
Rationale: There is a slight chance for the greater than 10 MeV proton
flux to exceed S1 (Minor) solar radiation storm levels over 04-06 Apr.
C. NOAA Radio Blackout Activity and Forecast
Radio blackouts reaching the R1 levels were observed over the past 24
hours. The largest was at Apr 03 2026 0756 UTC.
Radio Blackout Forecast for Apr 04-Apr 06 2026
Apr 04 Apr 05 Apr 06
R1-R2 55% 55% 55%
R3 or greater 15% 15% 15%
Rationale: R1-R2 (Minor-Moderate) radio blackouts are likely, with a
slight chance for isolated R3 (Strong) events, over 04-06 Apr driven
primarily by the flare potential of Regions 4404, 4405, and 4409.
Extended Space Weather Discussion:
Solar Activity
.24 hr Summary...
Solar activity was at moderate levels. Region 4409 (N02W01,
Eai/beta-gamma) produced the majority of X-ray activity over the past 24
hours, which included two impulsive M1.3 flares (R1-Minor) at 03/0756
UTC and 03/1250 UTC, respectively. The region exhibited penumbral growth
while consolidating spots near its leader. The remaining spotted regions
on the visible disk were either mostly stable or in gradual decay.
No Earth-directed CMEs were observed in available coronagraph imagery.
.Forecast...
Solar activity is likely to reach moderate (R1-R2/Minor-Moderate)
levels, with a slight chance for X-class (R3-Strong) flares, over 04-06
Apr driven primarily by the flare potential of Regions 4404, 4405, and
4409.
Energetic Particle
.24 hr Summary...
The greater than 2 MeV electron flux reached high levels with a peak
flux of 4,465 pfu. The greater than 10 MeV proton flux remained elevated
throughout the period, reaching a level of 6 pfu at 03/0405, but
remained below S1 (Minor) levels.
.Forecast...
The greater than 2 MeV electron flux is expected to reach high levels
on 04-06 Apr. There is a slight chance for the greater than 10 MeV
proton flux to exceed S1 (Minor) solar radiation storm levels over 04-06
Apr.
Solar Wind
.24 hr Summary...
Solar wind parameters indicated influence from a negative polarity CH
HSS until 03/1503 UTC, when a IP shock was observed from the arrival of
a CME that left the Sun on 01 Apr. The shock increased the total
magnetic fields strength from 5 nT to a peak of 14 nT. Bz was mostly
oriented southward, with a peak negative value of -11 nT observed at
03/1518 UTC. Solar wind speeds increased from ~625 km/s to ~800 km/s,
and then entered a gradual decline with values near 700 km/s by the end
of the UT day.
.Forecast...
The solar wind environment is expected to remain enhanced through 06 Apr
due to waning CME effects followed by negative polarity CH HSS
influences.
Geospace
.24 hr Summary...
The geomagnetic field reached G3 (Strong) geomagnetic storm levels
following the arrival of a CME that left the Sun on 01 Apr.
.Forecast...
The geomagnetic field is likely to reach G1-G2 (Minor-Moderate) storm
levels over 04 Apr due to combined effects of a CME that left the Sun on
01 and influence from a negative polarity CH HSS. G1 (Minor) conditions
are likely on 05 Apr and active conditions on 06 Apr as negative
polarity CH HSS influences wane and any remnant CME enhancements
subside.
27 Day Forecast:
Date | Radio Flux | Planetary A Index | Largest Kp Index
2026 Mar 30 155 22 5
2026 Mar 31 152 12 4
2026 Apr 01 155 8 3
2026 Apr 02 155 5 2
2026 Apr 03 150 18 4
2026 Apr 04 145 22 5
2026 Apr 05 145 10 3
2026 Apr 06 135 15 4
2026 Apr 07 125 8 3
2026 Apr 08 118 7 2
2026 Apr 09 120 25 5
2026 Apr 10 110 40 6
2026 Apr 11 112 20 5
2026 Apr 12 115 12 4
2026 Apr 13 115 8 3
2026 Apr 14 110 7 2
2026 Apr 15 115 5 2
2026 Apr 16 115 4 2
2026 Apr 17 120 7 2
2026 Apr 18 122 48 6
2026 Apr 19 124 22 5
2026 Apr 20 130 12 4
2026 Apr 21 140 12 4
2026 Apr 22 150 8 3
2026 Apr 23 155 5 2
2026 Apr 24 160 8 3
2026 Apr 25 155 15 4
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