Alerts:
none
Solar-terrestrial indices for 05 May follow.
Solar flux 128 and estimated planetary A-index 12.
The estimated planetary K-index at 0300 UTC on 06 May was 0.67.
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 04 May 026
Estimated Ap 05 May 013
Predicted Ap 06 May-08 May 008-016-018
NOAA Geomagnetic Activity Probabilities 06 May-08 May
Active 25/35/35
Minor storm 10/25/25
Moderate storm 05/05/05
Strong-Extreme storm 01/01/01
NOAA Kp index forecast 06 May - 08 May
May 06 May 07 May 08
00-03UT 2.67 3.33 4.00
03-06UT 2.33 3.00 3.67
06-09UT 2.00 2.33 3.33
09-12UT 1.33 1.33 3.00
12-15UT 1.67 2.33 2.33
15-18UT 2.33 3.00 2.33
18-21UT 2.00 3.67 3.33
21-00UT 2.67 4.33 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 5 (NOAA Scale
G1).
The greatest expected 3 hr Kp for May 06-May 08 2026 is 4.33 (below NOAA
Scale levels).
NOAA Kp index breakdown May 06-May 08 2026
May 06 May 07 May 08
00-03UT 2.67 3.33 4.00
03-06UT 2.33 3.00 3.67
06-09UT 2.00 2.33 3.33
09-12UT 1.33 1.33 3.00
12-15UT 1.67 2.33 2.33
15-18UT 2.33 3.00 2.33
18-21UT 2.00 3.67 3.33
21-00UT 2.67 4.33 3.67
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-19 over the past 24 hours, was
below S-scale storm level thresholds.
Solar Radiation Storm Forecast for May 06-May 08 2026
May 06 May 07 May 08
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 May 06-May 08 2026
May 06 May 07 May 08
R1-R2 25% 25% 35%
R3 or greater 1% 1% 5%
Rationale: There is an increasing chance for isolated R1-R2
(Minor-Moderate) radio blackouts on 06-08 May, primarily due to Region
4429 and an active region (likely old Region 4419) near L=330 (seen in
Solar Orbiter imagery and expected to rotate into view on 08 May).
Extended Space Weather Discussion:
Solar Activity
.24 hr Summary...
Solar activity was at low levels during the reporting period. The
largest event was a long-duration C6.0 flare from departed Region 4424
(N17, L=197) from beyond the western limb. Occasional low-level C-class
flaring was observed from Region 4425 (N06W75, Hsx/alpha), with isolated
flaring noted from the remaining regions.
There are currently eight numbered regions on the visible disk. Most
regions showed various stages of decay and consolidation. Region 4428
(S23W78, Eso/beta) underwent slight decay, showing consolidation and
submergence with a decrease in trailer umbra and an almost total loss of
its trailing penumbra. Region 4429 (S05W33, Cai/beta-gamma) exhibited
minor decay, particularly in the trailing spots; however, localized new
flux emerged between the two main dipoles and ahead of the leader,
leading to a slight gamma configuration. Region 4431 (S16W01, Eso/beta)
showed notable submergence, particularly within its trailing spots which
lost all penumbra as the region simplifies toward a unipolar state.
Region 4432 (N13E12, Cai/beta) experienced minor decay in its
intermediary spots following a recent growth phase. Region 4433 (S16E43,
Dso/beta) showed consolidation within its leading spot group alongside
decay and a near-total loss of penumbra in its trailing spots. All other
regions were stable.
No Earth-directed CMEs were observed in available coronagraph imagery.
.Forecast...
Solar activity is expected to be at low levels through 08 May, with a
chance for isolated M-class flares (R1-R2/Minor-Moderate), primarily due
to Region 4429 and an active region (likely old Region 4419) near L=330
(seen in Solar Orbiter imagery and expected to rotate into view on 08
May).
Energetic Particle
.24 hr Summary...
The greater than 2 MeV electron flux at geosynchronous orbit was at low
to moderate levels, with a peak flux of 337 pfu observed at 05/1520 UTC.
The greater than 10 MeV proton flux remained at background levels.
.Forecast...
The greater than 2 MeV electron flux is expected to remain at low to
moderate levels on 06–07 May with the transition back toward a slow
solar wind regime. An increase to high levels is expected by 08 May due
to the anticipated onset of a positive polarity coronal hole high-speed
stream (+CH HSS). The greater than 10 MeV proton flux is expected to
remain at background levels through 08 May.
Solar Wind
.24 hr Summary...
Solar wind parameters reflected the continued passage of a slow-moving
CME that initially arrived at approximately 04/1200 UTC. Total magnetic
field (Bt) was sustained near 10–11 nT early in the period, while the
North-South component (Bz) initially ranged -7 nT and -10 nT. A gradual
rotation was observed early in the period, with Bz recovering toward
near-zero and turning northward by 05/0600 UTC. Bz briefly strengthened
to 10 nT around 05/1400 UTC. Solar wind speed steadily declined
throughout the day, decreasing from approximately 450 km/s to 350 km/s.
The phi angle remained predominantly in the negative (towards the Sun)
sector.
.Forecast...
Solar wind parameters are expected to continue declining toward nominal
background levels on 06 May. Minor enhancements are possible due to
potential glancing influences from a CME that departed the Sun on 30
April, though confidence in this impact is low. On 07 May, a solar
sector boundary crossing is anticipated, followed by the onset of a +CH
HSS that is expected to persist through 08 May.
Geospace
.24 hr Summary...
The geomagnetic field started the reporting period at G1 (Minor)
storming levels. Following the storming, the field experienced a single
unsettled period before returning to quiet levels for the remainder of
the period.
.Forecast...
The geomagnetic field is anticipated to be at mostly quiet to unsettled
levels on 06 May as CME influences wane, though isolated active periods
remain possible due to the low-confidence 30 April CME. Active
conditions are likely on 07 and 08 May following the onset of the +CH
HSS, with isolated G1 (Minor) storming periods possible.
27 Day Forecast:
Date | Radio Flux | Planetary A Index | Largest Kp Index
2026 May 04 140 8 3
2026 May 05 140 6 2
2026 May 06 135 6 2
2026 May 07 130 6 2
2026 May 08 135 12 4
2026 May 09 130 10 3
2026 May 10 130 6 2
2026 May 11 125 5 2
2026 May 12 125 5 2
2026 May 13 120 5 2
2026 May 14 115 5 2
2026 May 15 120 25 5
2026 May 16 120 20 5
2026 May 17 125 20 5
2026 May 18 130 15 4
2026 May 19 130 5 2
2026 May 20 130 5 2
2026 May 21 130 8 3
2026 May 22 120 10 3
2026 May 23 125 12 4
2026 May 24 125 5 2
2026 May 25 125 5 2
2026 May 26 130 5 2
2026 May 27 135 12 4
2026 May 28 135 10 3
2026 May 29 130 8 3
2026 May 30 125 8 3
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)
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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)
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> 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