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Product: Daily Forecast of Geomagnetic Activity
Issued: 2023 November 12 07:30UTC
Prepared by the Athens Space Weather Forecasting Center
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1. Solar activity
Solar activity was decreasing stable during the past 24 hours.
Solar Flux (10.7 cm) measured on 11.11.2023 at 20:00 UTC was 142 sfu.
The background X-Ray flux is at the class C1.5 level.
The geomagnetic field was at quiet levels on November 11.
AR3477 produced a M1.2 class solar flare on November 11 at 17:29 (peak time) and a short radio blackout (R1) was observed. 
A halo CME observed on November 09 at 12:23 UT from AR3480 and was associated with a C2.6 class solar flare peaking on November 09 at 11:18 UT. This CME is expected to reach Earth on November 12 between 01:36 UT and 07:20 UT according to EAM predictions.
No obviously Earth directed CMEs were observed in available LASCO imagery.
The Kp index now is at quiet levels with Kp=1.

2. Solar Wind Geomagnetic Activity
Solar Wind speed from ACE: 561 km/s.
Solar Wind speed from STEREO A: 400 km/s.
Solar Wind speed from STEREO B: - km/s.
The southward component Bz is: 5 nT south.

3. Solar Energetic Particle Events
Protons and electrons are quiet.

4. Coronal Holes
A small coronal hole (CH1184) at southern hemisphere was Earth facing on November 10.

5. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to minor storm (G1) levels on Nonember 12 due to effects from CME observed on November 09, at quiet to active levels on November 13 and at quiet to unsettled levels on November 14.

   Date      Estimated Ap index      Expected geom. storm
2023.11.12           30                        G1
2023.11.13           12                        -
2023.11.14           08                        -

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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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