Alerts:
Space Weather Message Code: ALTK04
Serial Number: 2552
Issue Time: 2025 Apr 24 0709 UTC
ALERT: Geomagnetic K-index of 4
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
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: WARK04
Serial Number: 4937
Issue Time: 2025 Apr 24 0656 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Apr 24 0655 UTC
Valid To: 2025 Apr 24 1200 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.
Solar-terrestrial indices for 23 April follow.
Solar flux 167 and estimated planetary A-index 7.
The estimated planetary K-index at 0600 UTC on 24 April was 2.33.
No space weather storms were observed for the past 24 hours.
No space weather storms are predicted for the next 24 hours.
Geo Magnetic Forecast:
NOAA Ap Index Forecast
Observed Ap 22 Apr 013
Estimated Ap 23 Apr 017
Predicted Ap 24 Apr-26 Apr 018-012-008
NOAA Geomagnetic Activity Probabilities 24 Apr-26 Apr
Active 35/35/20
Minor storm 20/20/05
Moderate storm 05/05/01
Strong-Extreme storm 01/01/01
NOAA Kp index forecast 24 Apr - 26 Apr
Apr 24 Apr 25 Apr 26
00-03UT 4.00 3.67 2.33
03-06UT 3.33 3.00 2.00
06-09UT 3.33 2.00 2.33
09-12UT 4.00 2.67 2.00
12-15UT 3.00 2.67 2.00
15-18UT 3.00 2.67 2.00
18-21UT 2.33 2.00 2.00
21-00UT 2.67 2.67 2.00
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 24-Apr 26 2025 is 4.00 (below NOAA
Scale levels).
NOAA Kp index breakdown Apr 24-Apr 26 2025
Apr 24 Apr 25 Apr 26
00-03UT 4.00 3.67 2.33
03-06UT 3.33 3.00 2.00
06-09UT 3.33 2.00 2.33
09-12UT 4.00 2.67 2.00
12-15UT 3.00 2.67 2.00
15-18UT 3.00 2.67 2.00
18-21UT 2.33 2.00 2.00
21-00UT 2.67 2.67 2.00
Rationale: No G1 (Minor) or greater geomagnetic storms are expected. No
significant transient or recurrent solar wind features are forecast.
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 24-Apr 26 2025
Apr 24 Apr 25 Apr 26
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 Apr 24-Apr 26 2025
Apr 24 Apr 25 Apr 26
R1-R2 40% 40% 40%
R3 or greater 1% 1% 1%
Rationale: There is a chance for R1 (Minor) radio blackouts. No
significant active region flare activity is forecast.
Extended Space Weather Discussion:
Solar Activity
.24 hr Summary...
Solar activity has been at low levels with only minor C-class flaring
through the period. Regions near center disk are the largest and most
magnetically complex and they have been the most active; Region 4070
(S12E24, Dai/beta-gamma), 4069 (S08W05, Dao/beta), and Region 4064
(N11W18, Eai/beta-gamma). All other regions have been stable.
There have been no Earth-directed CMEs during the period.
.Forecast...
Solar activity is expected to be moderate with a chance of M-class
flares (R1-R2, Minor-Moderate) over 4-26 Apr.
Energetic Particle
.24 hr Summary...
The greater than 2 MeV electron flux was at moderate levels and the
greater than 10 MeV proton flux was at background levels.
.Forecast...
The greater than 2 MeV electron flux is likely to reach high levels over
24-25 Apr due to HSS influence. The greater than 10 MeV proton flux is
expected to continue at background levels.
Solar Wind
.24 hr Summary...
Solar wind parameters continued to be slightly enhanced due to the HSS
associated with the positive polarity CH in the southern hemisphere.
Total field has been around 5 nT with a variable Bz component of +/-5
nT. Solar wind speeds have been decreasing from around 600 km/s at the
start of the UTC day to near 500 km/s. The phi angle has been mostly
positive.
.Forecast...
Solar wind parameters are expected to continue to be influenced by
positive polarity, CH HSS conditions through 25 Apr. Nominal conditions
are expected thereafter.
Geospace
.24 hr Summary...
The geomagnetic field has been at quiet to unsettled levels.
.Forecast...
The geomagnetic field is expected to remain at mostly unsettled levels
with active conditions possible through 25 Apr. Quiet conditions are
expected thereafter.
27 Day Forecast:
Date | Radio Flux | Planetary A Index | Largest Kp Index
2025 Apr 21 160 12 4
2025 Apr 22 165 35 6
2025 Apr 23 165 35 6
2025 Apr 24 165 25 5
2025 Apr 25 165 18 5
2025 Apr 26 165 8 3
2025 Apr 27 165 8 3
2025 Apr 28 170 6 2
2025 Apr 29 170 6 2
2025 Apr 30 170 6 2
2025 May 01 170 25 5
2025 May 02 175 35 6
2025 May 03 170 20 4
2025 May 04 165 12 4
2025 May 05 165 25 5
2025 May 06 165 20 5
2025 May 07 160 18 5
2025 May 08 165 18 5
2025 May 09 165 18 5
2025 May 10 165 15 5
2025 May 11 160 18 5
2025 May 12 155 5 2
2025 May 13 155 5 2
2025 May 14 155 5 2
2025 May 15 155 5 2
2025 May 16 155 12 4
2025 May 17 155 12 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