Обсуждение космического прогноза погоды
Существующий: 2019 Jul 21 1230 UTC
Подготовлено Министерством торговли США, NOAA, Центром прогнозирования космической погоды и представлено SpaceWeatherLive.com
Solar activity remained very low with a spotless visible disk. No
Earth-directed CMEs were observed in available coronagraph imagery.
Solar activity is expected to remain very low on 21-23 Jul.
The greater than 2 MeV electron flux was at moderate to high levels with
a maximum flux of 1,846 pfu observed at 20/1815 UTC. The greater than 10
MeV proton flux continued at background values.
The greater than 2 MeV electron flux is expected to reach moderate to
high levels on 21 Jul, decreasing to normal to moderate levels on 22-23
Jul. The greater than 10 MeV proton flux is expected to remain at
Solar wind parameters, as measured by the ACE spacecraft, indicated
nominal conditions. Solar winds speeds were between 315-360 km/s. Total
magnetic field strength ranged from 3-5 nT. Phi angle was predominantly
oriented in the positive sector after 20/1320 UTC.
Mostly nominal wind parameters are expected until early on 23 Jul, when
mild influence from a negative polarity CH HSS is anticipated.
The geomagnetic field was quiet.
The geomagnetic field is expected to persist at quiet levels on 21-22
Jul. Unsettled conditions are likely on 23 Jul in response to weak
influence from a negative polarity CH HSS.