Alerts:
Space Weather Message Code: ALTEF3
Serial Number: 3663
Issue Time: 2026 Apr 01 1330 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3662
Begin Time: 2026 Mar 22 1430 UTC
Yesterday Maximum 2MeV Flux: 1413 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
Space Weather Message Code: SUMSUD
Serial Number: 297
Issue Time: 2026 Apr 01 1233 UTC
SUMMARY: Geomagnetic Sudden Impulse
Observed: 2026 Apr 01 1206 UTC
Deviation: 19 nT
Station: HAD
www.swpc.noaa.gov/noaa-scales-explanation
Space Weather Message Code: WARK04
Serial Number: 5306
Issue Time: 2026 Apr 01 1210 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Apr 01 1210 UTC
Valid To: 2026 Apr 01 2359 UTC
Warning Condition: Onset
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: WARSUD
Serial Number: 252
Issue Time: 2026 Apr 01 1139 UTC
WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2026 Apr 01 1206 UTC
Valid To: 2026 Apr 01 1236 UTC
IP Shock Passage Observed: 2026 Apr 01 1130 UTC
www.swpc.noaa.gov/noaa-scales-explanation
Space Weather Message Code: WATA30
Serial Number: 269
Issue Time: 2026 Mar 31 2213 UTC
WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day:
Apr 01: G2 (Moderate) Apr 02: G1 (Minor) Apr 03: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
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.
Solar-terrestrial indices for 31 March follow.
Solar flux 141 and estimated planetary A-index 7.
The estimated planetary K-index at 1800 UTC on 01 April was 2.00.
No space weather storms were observed for the past 24 hours.
Space weather for the next 24 hours is predicted to be moderate.
Geomagnetic storms reaching the G2 level are likely.
Radio blackouts reaching the R1 level are likely.
Geo Magnetic Forecast:
NOAA Ap Index Forecast
Observed Ap 30 Mar 012
Estimated Ap 31 Mar 030
Predicted Ap 01 Apr-03 Apr 024-023-018
NOAA Geomagnetic Activity Probabilities 01 Apr-03 Apr
Active 30/30/40
Minor storm 35/35/30
Moderate storm 15/15/01
Strong-Extreme storm 01/01/01
NOAA Kp index forecast 01 Apr - 03 Apr
Apr 01 Apr 02 Apr 03
00-03UT 5.00 2.67 3.67
03-06UT 4.67 2.67 3.33
06-09UT 4.33 2.00 3.00
09-12UT 4.00 3.33 3.00
12-15UT 3.00 4.00 3.00
15-18UT 2.67 4.67 3.00
18-21UT 2.00 4.33 3.33
21-00UT 2.33 4.67 3.67
Extended Three Day Forecast:
A. NOAA Geomagnetic Activity Observation and Forecast
The greatest observed 3 hr Kp over the past 24 hours was 3 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Apr 01-Apr 03 2026 is 5.00 (NOAA Scale
G1).
NOAA Kp index breakdown Apr 01-Apr 03 2026
Apr 01 Apr 02 Apr 03
00-03UT 3.00 2.00 4.33
03-06UT 1.33 1.67 4.00
06-09UT 1.33 1.67 3.33
09-12UT 1.67 2.33 3.33
12-15UT 4.00 3.67 2.67
15-18UT 3.67 5.00 (G1) 2.33
18-21UT 2.33 4.33 2.33
21-00UT 3.67 5.00 (G1) 3.67
Rationale: The geomagnetic field is expected to be at unsettled to
active periods for the rest of the UTC day on 01 Apr with G1-G2
(Minor-Moderate)
storming possible as CME effects persist. Active to G1 (Minor) storming
is likely on 02 Apr with the onset of a negative polarity CH HSS.
Unsettled to active levels are expected to persist through 03 Apr.
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 01-Apr 03 2026
Apr 01 Apr 02 Apr 03
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 through 03 Apr.
C. NOAA Radio Blackout Activity and Forecast
No radio blackouts were observed over the past 24 hours.
Radio Blackout Forecast for Apr 01-Apr 03 2026
Apr 01 Apr 02 Apr 03
R1-R2 55% 55% 55%
R3 or greater 20% 20% 20%
Rationale: Solar activity is likely to reach moderate levels with R1-R2
(Minor-Moderate) flaring, with slight chance for X-class flares through
03 Apr, due primarily to the flare potential of Region 4405.
Extended Space Weather Discussion:
Solar Activity
.24 hr Summary...
Solar activity was at very low to low levels. Low level C-class flares
were produced by Regions 4405 (S27E12, Esi/beta-gamma) and 4409 (N02E31,
Dro/beta). The largest flare was a C1.2 at 01/0651 UTC from Region 4409.
Slight growth was observed in Regions 4409 and 4404 (N15W00, Csi/beta).
The rest of the spotted regions were either stable or in decay.
Other activity included two filament eruptions. The first was an
approximate 5 degree filament eruption, centered near N20W12, occurring
at 01/0202 UTC. The ejecta appeared narrow and directed NNW in SUVI 304
imagery. An associated CME was observed off the NW limb at 01/0312 UTC
in SOHO/LASCO C2 imagery. Initial analysis suggested no Earth-directed
component.
Another larger filament eruption was observed lifting off around 01/0310
UTC in the SW quadrant. The filament appeared to be around 50 degrees
centered near S32W55. Analysis of the CME will be conducted as imagery
becomes available.
.Forecast...
Solar activity is likely to reach moderate levels with R1-R2
(Minor-Moderate) flaring, with slight chance for X-class flares through
03 Apr, due primarily to the flare potential of Region 4405.
Energetic Particle
.24 hr Summary...
Electrons greater than 2 MeV at geosynchronous orbit reached high levels
with a peak flux of 1,380 pfu at 31/1600 UTC. The greater than 10 MeV
proton flux at geosynchronous orbit remained at background levels during
the period.
.Forecast...
The greater than 2 MeV electron flux is likely to be reach high levels
on 01-02 Apr and return to moderate to normal levels on 03 Apr. There
is a slight chance for the greater than 10 MeV proton flux to exceed S1
(Minor) solar radiation storm levels through 03 Apr.
Solar Wind
.24 hr Summary...
Solar wind parameters were at mostly nominal levels until a IP shock was
observed at the ACE spacecraft at 01/1130 UTC indicating a much later
than expected arrival of the 30 Mar CME. Solar wind speed increased from
approximately 400 km/s to near 500 km/s. Total field increase to 14 nT
while the Bz component was between +/-5 nT. Phi angle was predominantly
positive.
.Forecast...
Likely weaker CME influence is expected to continue through the rest of
the UTC day on 01 Apr. Further enhancements in solar wind conditions are
anticipated around midday on 02 Apr as a negative polarity CH HSS is
expected to become geoeffective. HSS activity is expected to persist
into 03 Apr.
Geospace
.24 hr Summary...
The geomagnetic field was quiet to unsettled.
.Forecast...
The geomagnetic field is expected to be at unsettled to active periods
for the rest of the UTC day on 01 Apr with G1-G2 (Minor-Moderate)
storming possible as CME effects persist. Active to G1 (Minor) storming
is likely on 02 Apr with the onset of a negative polarity CH HSS.
Unsettled to active levels are expected to persist through 03 Apr.
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