Space Weather Report
Space Weather Report
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Product: Daily Forecast of Geomagnetic Activity
Issued: 2026 January 01 08:42UTC
Prepared by the Athens Space Weather Forecasting Center
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I. Solar activity
--Current Status
Solar Flux (10.7cm) measured on 31.12.2025 at 23:00 UTC was 171 sfu.
The background X-Ray flux is at the class C1.5 level.
AR4324 erupted on December 31 at 13:51 UT peak time producing a M7.1-class solar flare and a radio blackout of category R2.
No obviously Earth directed CMEs were observed in available LASCO imagery on December 30.
A CME was observed on December 28 at 23:00 UT. This CME is expected to reach Earth between on December 31 at 23:12 UT and on January 01 at 06:46 UT according to EAM prediction.
No obviously Earth directed CMEs were observed in available LASCO imagery on December 26-27.
A CME was observed on December 31 at 14:00 UT. This CME is expected to reach Earth between on January 02 at 20:26 UT and on January 03 at 06:30 UT according to EAM prediction.
II. Solar Energetic Particle Events
Protons and electrons fluxes are quiet.
III. Interplanetary and Geomagnetic conditions
The solar wind speed measured by ACE satellite reached the max value 536 Km/s on December 31 at 14:20 UT during the last 24 hours.
The solar wind speed from STEREO A was detected 400 Km/s during the last 24 hours.
The vertical component of IMF Bz reached the max value -8 nT on January 01 at 06:00 UT during the last 24 hours.
The geomagnetic field was at quiet to unsettled levels during the last 24 hours.
The Kp index now is at unsettled levels with Kp=3.
IV. 3-day Geomagnetic Activity Forecast
The geomagnetic field is expected to be at quiet to minor storm (G1) levels on January 01-03 due to effects associated with CH1337 and CMEs.
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Athens Space Weather Forecasting Center
Physics Department, National & Kapodistrian University of Athens
Athens Neutron Monitor Station A.NE.MO.S
Tel.: +30 210 727 6901
email: spaceweather@phys.uoa.gr
URL: http://spaceweather.phys.uoa.gr
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Product: Daily Forecast of Geomagnetic Activity
Issued: 2026 January 01 08:42UTC
Prepared by the Athens Space Weather Forecasting Center
***********************************************************************
I. Solar activity
--Current Status
Solar Flux (10.7cm) measured on 31.12.2025 at 23:00 UTC was 171 sfu.
The background X-Ray flux is at the class C1.5 level.
AR4324 erupted on December 31 at 13:51 UT peak time producing a M7.1-class solar flare and a radio blackout of category R2.
No obviously Earth directed CMEs were observed in available LASCO imagery on December 30.
A CME was observed on December 28 at 23:00 UT. This CME is expected to reach Earth between on December 31 at 23:12 UT and on January 01 at 06:46 UT according to EAM prediction.
No obviously Earth directed CMEs were observed in available LASCO imagery on December 26-27.
A CME was observed on December 31 at 14:00 UT. This CME is expected to reach Earth between on January 02 at 20:26 UT and on January 03 at 06:30 UT according to EAM prediction.
II. Solar Energetic Particle Events
Protons and electrons fluxes are quiet.
III. Interplanetary and Geomagnetic conditions
The solar wind speed measured by ACE satellite reached the max value 536 Km/s on December 31 at 14:20 UT during the last 24 hours.
The solar wind speed from STEREO A was detected 400 Km/s during the last 24 hours.
The vertical component of IMF Bz reached the max value -8 nT on January 01 at 06:00 UT during the last 24 hours.
The geomagnetic field was at quiet to unsettled levels during the last 24 hours.
The Kp index now is at unsettled levels with Kp=3.
IV. 3-day Geomagnetic Activity Forecast
The geomagnetic field is expected to be at quiet to minor storm (G1) levels on January 01-03 due to effects associated with CH1337 and CMEs.
| Date | Ap index forecast | Geomagnetic Activity level |
|---|---|---|
| 01.01.2026 | 20 | Quiet to Minor Storm (G1) |
| 02.01.2026 | 18 | Quiet to Minor Storm (G1) |
| 03.01.2026 | 25 | Quiet to Minor Storm (G1) |
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Athens Space Weather Forecasting Center
Physics Department, National & Kapodistrian University of Athens
Athens Neutron Monitor Station A.NE.MO.S
Tel.: +30 210 727 6901
email: spaceweather@phys.uoa.gr
URL: http://spaceweather.phys.uoa.gr
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