Space Weather Report

Athens Cosmic Ray Station
Product: Daily Forecast of Geomagnetic Activity
Issued: 2024 April 19 04:01UTC
Prepared by the Athens Space Weather Forecasting Center

I. Solar activity
--Current Status
Solar Flux (10.7cm) measured on 18.04.2024 at 23:00 UTC was 227 sfu.
The background X-Ray flux is at the class C2.7 level.
Three M-class solar flares were produced on April 18 and the biggest was the M2.2.
AR3638 erupted on April 18 at 02:48 UT peak time producing a M2.2 class solar flare and a radioblackout of category R1.
No obviously Earth directed CMEs were observed in available LASCO imagery on April 15-17.
A coronal hole (CH1214) at southern hemisphere rotated across the central meridian on April 17.

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 423 Km/s on April 18 at 15:35 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 -3 nT on April 18 at 20:45 UT during the last 24 hours.
The geomagnetic field was at quiet levels during the last 24 hours.
The Kp index now is at quiet levels with Kp=2.

IV. 3-day Geomagnetic Activity Forecast
The geomagnetic field is expected to be at quiet to unsettled levels on April 19-21.

DateAp index forecastGeomagnetic Activity level
19.04.202406Quiet to Unsettled
20.04.202410Quiet to Unsettled
21.04.202410Quiet to Unsettled

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