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Product: Daily Forecast of Geomagnetic Activity
Issued: 2021 January 06 06:59UTC
Prepared by the Athens Space Weather Forecasting Center
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1. Solar activity
Solar activity was increasing during the past 24 hours.
Solar Flux (10.7 cm) measured on 05.01.2021 at 20:00 UTC was 75 sfu.
The background X-Ray flux is at the class A1.1 level.
The geomagnetic field was at quiet to active levels on January 05.
The Jan. 2 11:24UT CME arrived on Jan 05 12:20UT only 0.73 hours later than EAMv2 prediction.
No obviously Earth directed CMEs were observed in available LASCO imagery of Jan. 05.
The Kp index now is at unsettled levels with Kp=3.

2. Solar Wind Geomagnetic Activity
Solar Wind speed from ACE: 570 km/s.
Solar Wind speed from STEREO A: 380 km/s.
Solar Wind speed from STEREO B: --- km/s.
The southward component Bz is: 3 nT south.

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

4. Coronal Holes
A new coronal hole (CH985) in the southern hemisphere of the visible solar disk will be in Earth facing position on Jan. 02-03. A new coronal hole (CH986) in the northern hemisphere of the visible solar disk will be in Earth facing position on Jan. 03.

5. Geophysical Activity Forecast
The geomagnetic field is expected to be at unsettled to active levels, with a chance for minor storm intervals, on Jan. 06 due to the combined effects of high speed streams of solar wind from CH and the CME arrival. Quiet to unsettled conditions are expected on Jan. 07 and quiet conditions are expected on Jan. 08.

   Date      Estimated Ap index      Expected geom. storm
2021.01.06           16                        -
2021.01.07           09                        -
2021.01.08           05                        -

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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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