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Solar-terrestrial indices for 17 June follow.
Solar flux 111 and estimated planetary A-index 6.
The estimated planetary K-index at 0900 UTC on 18 June 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 16 Jun 006
Estimated Ap 17 Jun 006
Predicted Ap 18 Jun-20 Jun 010-015-012

NOAA Geomagnetic Activity Probabilities 18 Jun-20 Jun
Active                25/35/35
Minor storm           10/25/20
Moderate storm        01/10/05
Strong-Extreme storm  01/01/01

NOAA Kp index forecast 18 Jun - 20 Jun
             Jun 18    Jun 19    Jun 20
00-03UT        3.33      3.00      3.00
03-06UT        3.00      4.00      3.67
06-09UT        2.33      3.67      2.67
09-12UT        2.00      3.00      2.33
12-15UT        1.67      3.00      2.00
15-18UT        1.33      2.00      2.00
18-21UT        1.33      1.67      2.33
21-00UT        2.67      3.00      3.00


Extended Three Day Forecast:

A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 2 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Jun 18-Jun 20 2026 is 4.00 (below NOAA
Scale levels).

NOAA Kp index breakdown Jun 18-Jun 20 2026

             Jun 18       Jun 19       Jun 20
00-03UT       3.33         3.00         3.00
03-06UT       3.00         4.00         3.67
06-09UT       2.33         3.67         2.67
09-12UT       2.00         3.00         2.33
12-15UT       1.67         3.00         2.00
15-18UT       1.33         2.00         2.00
18-21UT       1.33         1.67         2.33
21-00UT       2.67         3.00         3.00

Rationale: No G1 (Minor) or greater geomagnetic storms are expected
through Jun 20.

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 Jun 18-Jun 20 2026

              Jun 18  Jun 19  Jun 20
S1 or greater    1%      1%      1%

Rationale: No S1 (Minor) or greater solar radiation storms are expected
through Jun 20.

C. NOAA Radio Blackout Activity and Forecast

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for Jun 18-Jun 20 2026

              Jun 18        Jun 19        Jun 20
R1-R2           10%           15%           15%
R3 or greater    1%            1%            1%

Rationale: There is a slight chance of R1-R2 (Minor-Moderate) radio
blackouts through Jun 20.


Extended Space Weather Discussion:

Solar Activity

.24 hr Summary...
Solar activity was low with only C-class solar flare activity. Region
4465 (N07W49, Cso/beta) underwent some decay and only produced a
low-level C-class flare. Region 4469 (S16W06, Bxo/beta) decayed further
and was inactive. Region 4470 (N07E54, Dao/beta) underwent some growth,
but did not increase in magnetic complexity. The region was primarily
inactive. The largest solar flare of the period, a C2.5 at 17/1506 UTC,
came from just beyond the west limb with the likely source being
recently rotated out of view Region 4464 (S14, L=342).

A CME became visible in STEREO coronagraph imagery at 17/0038 UTC and
CCOR imagery approximately 30 min later. This eruption was first
determined to be farsided due to SUVI 304 and 193 imagery; however, the
backfilling of a SOHO LASCO data gap prompted a re-analysis and it
has since concluded that there may be an Earth-directed component.
Modeling is currently ongoing.

There was an additional, faster, eruption off the east limb close to the
equator, with the resulting CME first appearing in LASCO C2 imagery at
approximately 17/0135 UTC. Due to its faintness, this CME is not visible
in other coronagraphs. Modeling of this event is also ongoing, but a
significant Earth-directed component is not anticipated.

.Forecast...
Solar activity is likely to continue at low levels 18-20 Jun, with a
slight chance for M-class (R1-Minor) solar flares due primarily to the
combined flare probabilities of Regions 4465 and 4470.

Energetic Particle

.24 hr Summary...
The greater than 2 MeV electron flux was at moderate levels and the
greater than 10 MeV proton flux remained at background values.

.Forecast...
The greater than 2 MeV electron flux is likely to continue reaching
moderate levels 18-20 Jun; while the greater than 10 MeV proton flux is
expected to remain at background.

Solar Wind

.24 hr Summary...
Solar wind parameters were indicative of a weak disturbance in the IMF,
which was probably related to anticipated early stage CH HSS influences.
The total IMF strength peaked at 12 nT due to probable CIR effects,
before it weakened to values at 5 nT or less. The Bz component was
variable without a pronounced southward deflection. The phi angle was
quite variable between sectors. Solar wind speed increased from 400 km/s
to near 500 km/s before declining to about 450 km/s.

.Forecast...
Mild solar wind disturbance and enhancements are anticipated through 20
Jun due to weak positive polarity CH HSS effects.

Geospace

.24 hr Summary...
The geomagnetic field was quiet.

.Forecast...
The geomagnetic field is likely to be quiet to unsettled on 18 Jun in
response to weak CH HSS influences. Slightly more response is forecast
19-20 Jun with unsettled to active conditions likely due to additional
and continuing CH HSS effects.


27 Day Forecast:

Date | Radio Flux | Planetary A Index | Largest Kp Index
2026 Jun 15     120           8          3
2026 Jun 16     122           8          3
2026 Jun 17     135           8          3
2026 Jun 18     135           5          2
2026 Jun 19     132          12          4
2026 Jun 20     132          10          3
2026 Jun 21     130           5          2
2026 Jun 22     112           8          3
2026 Jun 23     135          12          4
2026 Jun 24     136           5          2
2026 Jun 25     138           5          2
2026 Jun 26     140           5          2
2026 Jun 27     135          10          3
2026 Jun 28     118          10          3
2026 Jun 29     130           5          2
2026 Jun 30     115           5          2
2026 Jul 01     130           8          3
2026 Jul 02     130          10          3
2026 Jul 03     136           5          2
2026 Jul 04     118          10          3
2026 Jul 05     130           8          3
2026 Jul 06     128           8          3
2026 Jul 07     128           5          2
2026 Jul 08     128          15          4
2026 Jul 09     125           8          3
2026 Jul 10     125          12          4
2026 Jul 11     120           8          3


  • GRAPH OPTIONS: Learn more
    It is recommended that you start out with the default options. As you get used to AF you can disable additional information and combine data series' together to maxamise the use of screen space.

  • DATA SOURCES: Learn more
    Some data sources can only be enabled or disabled via the tick box. Others are disabled using the slider set to 0, or enabled by setting the slider from 0.5 to 4. This number also represents the thinkness of the line plot onto the graph.

  • 'The' Aurora Forecast Index: Learn more
    These are two good options for predicting Auroras.

    The Aurora Forecast Index takes into account many data sources. As a general rule if it stays high for many hours there is a good possibility of an Aurora present.

    Aurora Forecast website usage is also a good indicator, as visitors to the site come from many traffic sources. General internet and community chatter transplating to visits is a great indicator.

  • Planatary K Index (Kp): Learn more
    The Kp number is a system of measuring aurora strength. The range goes from 0 to 9 (0 being calm, 1 very weak, all the way up to 9, which would represent a major geomagnetic storm with strong auroras visible).

    Kp 5 and above is classified as a geomagnetic storm. Most Aurora Hunters consider prolonged 3+ or higher worth investigation.

  • Ovation (Model) Short Term Forecast (GW):' Learn more
    The Ovation-Prime Model produced by SWPC calculates the energy interacting with the Earths magnetic field. This is a good indicator for Aurora activity.
  • DSCOVR Observatory (L1): Learn more

    The DSCOVR or Deep Space Climate Obervatory sits 1.5 million Kilometers from Earth, between the Earth and the Sun in the L1 orbit point, the neutral gravity point between the Earth and the Sun. DSCOVR provides space weather readings, allowing for up to an hour of warning on weather events. This is why DSCOVR's data appears in the future on the graph.

    Strong negative Bz direction is linked to Aurora's because the solar wind magnetic direction is in direct oposition with the Earths magnetic field.

  • ACE Observatory (L1): Learn more

    ACE or Advanced Composition Explorer sits 1.5 million Kilometers from Earth, between the Earth and the Sun in the L1 orbit point, the neutral gravity point between the Earth and the Sun. ACE has now been replaced by DSCOVR, but the data is still useful for comparing to DSCOVR.
  • GOES Satalites: Learn more

    GOES or Geostationary Operational Environmental Satellites sit 46 Kilometers above the Earth in geostationary orbit. They provide local space weather data and are a good indicator for current geomagnetic conditions.

  • Terrestrial Magnetometer Sources: Learn more
    Terrestrial or surface magnetometers detect fluctuations in the Earths magnetic field from the ground.
    These do not work as well as satalites as the magnetic field obsorbs some of the effects from the solar winds.
    There is a mix of govenment and citizen science stations listed here, including two run by Aurora Forecast in Hobart.
  • User Magnetometer ID's: Learn more
    If you have a TAFS Magnetometer and you want to add it to the graph you can do it here.
    Insent your Mag's Unique ID.

 

v4.16b

Aurora Forecast is free to use, however it takes a lot of time and effort to maintain. If you find it useful and are a regular user then please consider making a donation to keep it running. Feedback is always welcome.


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

Aurora Forecast is free to use, however it takes a lot of time and effort to maintain.
Why not make a donation to keep it running?
Feedback is always welcome. - ©2022 Brendan Davey