Here is the current forecast discussion on space weather and...

Here is the current forecast discussion on space weather and geophysical activity, issued 2017 May 31 1230 UTC.

Solar Activity

24 hr Summary: Solar activity was at very low levels. There were no spotted regions on the visible disk. Several B-class flares were observed from a region beyond the East Limb. No Earth-directed CMEs were observed in available coronagraph imagery.

A large filament centered near S15E30 disappeared from GONG H-alpha imagery at around 30/1200 UTC. The feature can also be seen lifting in loops of SDO AIA 304 imagery. Analysis of LASCO C2 imagery determined that this event is narrow off the East limb, and off the Sun-Earth line.

Forecast: Solar activity is expected to be at very low levels throughout the forecast period (31 May-02 Jun).

Energetic Particle

24 hr Summary: The greater than 2 MeV electron flux was at normal to moderate levels this period. The greater than 10 MeV proton flux remained at background levels throughout the period.

Forecast: The greater than 2 MeV electron flux is expected to be at normal to moderate levels on days one and two (31 May -01 Jun) with the potential to reach moderate to high levels by day three (02 Jun). The greater than 10 MeV proton flux is expected to persist at background levels throughout the forecast period (31-02 Jun).

Solar Wind

24 hr Summary: Solar wind parameters reflected near ambient conditions. Solar wind speeds gradually declined over the period from near 550 km/s to 450 km/s. Total field was between 6 and 9 nT while the Bz component was mostly northward. The phi angle was positive.

Forecast: Background solar wind parameters are expected on days one and two (31 May-01 Jun) with the return to a nominal solar wind regime. Day three (02 Jun) may see an increase in velocity associated with a non-recurrent, positive polarity, coronal hole visible in SDO AIA 193.

Geospace

24 hr Summary: The geomagnetic field was quiet.

Forecast: The geomagnetic field is expected to be mostly quiet on days one and two (31 May - 01 Jun). Active conditions are possible on day three (02 Jun) with the onset of HSS effects from the aforementioned non-recurrent positive polarity coronal hole.

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