[Propagation+Space Weather] Today's Space Weather Forecast Discussion on 2015 May 26 1230 UTC

[nw7us@sunspotwatch.com]

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Here is the current forecast discussion on space weather and geophysical activity, issued 2015 May 26 1230 UTC.

Solar Activity

24 hr Summary: Solar activity remained at very low levels. The largest regions on the disk, Regions 2349 (S20W68, Cao/beta) and 2353 (N07W51, Cao/beta) both indicated decay. The remaining regions were stable or showing signs of decay as well. Additionally, there are three large filaments on the visible disk that will require continued monitoring. No Earth-directed CMEs were observed in available coronagraph imagery.

Forecast: Solar activity is expected to be at very low levels with a chance for C-class activity over the next three days (26-28 May).

Energetic Particle

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

Forecast: The greater than 2 MeV electron flux is expected to be at predominately normal background levels over the next three days (26-28 May) while the greater than 10 MeV proton flux is expected to remain at background levels throughout the forecast period.

Solar Wind

24 hr Summary: Solar wind parameters, measured at the ACE satellite, indicated a nominal wind environment. Solar wind speeds were generally steady averaging about 320 km/s. Total magnetic field strength varied between 1-8 nT while the Bz component varied between +7 to -6 nT. The phi angle was predominately negative (toward) throughout the period except for a brief switch to positive (away).

Forecast: Solar wind parameters are expected to remain at nominal levels over the next two days (26-27 May). An enhancement in the solar wind environment is expected on day three (28 May) as an equatorial, positive polarity coronal hole high speed stream (CH HSS) moves into a geoeffective position.

Geospace

24 hr Summary: The geomagnetic field remained at quiet levels.

Forecast: The geomagnetic field is expected to persist at quiet levels over the next two days (26-27 May). Quiet to unsettled conditions are expected as an equatorial, positive polarity CH HSS moves into a geoeffective position on day three (28 May).

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Live data: SunSpotWatch.com

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