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Product: Daily Forecast of Geomagnetic Activity
Issued: 2022 April 17 07:11UTC
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 16.04.2022 at 20:00 UTC was 122 sfu.
The background X-Ray flux is at the class C3.6 level.
The geomagnetic field was at quiet to unsettled levels on Apr. 16.
AR2994(N12E88)  produced a X1.1 class solar flare on April. 17 at 03:34 (peak time) and radio blackout (R2) was observed.
No obviously Earth directed CMEs were observed in available LASCO imagery.
The Kp index now is at unsettled levels with Kp=3.

2. Solar Wind Geomagnetic Activity
Solar Wind speed from ACE: 511 km/s.
Solar Wind speed from STEREO A: 400 km/s.
Solar Wind speed from STEREO B: - km/s.
The southward component Bz is: 3 nT north.

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

4. Coronal Holes
A equatorial coronal hole (CH1073) rotated across the central meridian on April 12-13. A coronal hole (CH1074) at northern hemisphere was Earth facing on Apr.14-15.

5. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet to active levels on Apr. 17-18 due to a high speed stream from CH1074 and at quiet to unsettled levels on Apr. 19.

   Date      Estimated Ap index      Expected geom. storm
2022.04.17           12                        -
2022.04.18           12                        -
2022.04.19           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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