SPACE - S0 - 20210727 - Auroral Anomaly, Another CME, Earth's Rotation
Good Morning, 0bservers!
Solar wind speeds calmed down a bit after their rather odd and jittery readings between 0600-0900 UTC yesterday, dropping below 300 KPS briefly around 1400 UTC before rising to 330 KPS by midnight UTC. It's currently in the 300-320 KPS range as of 1000 UTC. Particle Density has been on a slow but steady rise for most of the period, while Temperatures had a drop of a few hundred degrees Kelvin around 2200, with the line riding along 4000°K. The Phi Angle was busy, and not in a good way, destabilizing and shifting a number of times due to Bt/Bz polarity collisions. The KP-Index remained quite calm, not rising above KP-1 for the past few days, so that "glancing blow" from the CME that was expected must've missed or was so dispersed that it had no effect. The latter is doubtful, though, considering the weakness of our magnetic "shield". Magnetometer readings are a nominal sine wave, and both the Proton Flux and Electron Flux are also nominal, save a gap of several hours on the Electron Flux chart. They're all getting a bit glitchy (yes, that is a scientific term) up there. There was a (very) minor rise in X-Ray Flux production around 1400 UTC and then again around 0130 UTC, barely reaching Class B-1 levels. The background radiation has finally dipped into the upper Class A region for the first time in a while. We've got another "difference" between the two ENLIL spiral forecasts (one from SpaceWeatherNews, the other from NOAA). SWN is showing what appears to be a rather hefty CME headed directly for Earth with impact by the end of this week. NOAA, on the other hand, is showing... nothing. Hasn't updated in several days, and they generally only do a new GIF/video loop when something interesting happens. The LASCO C3 did show an ejection starting around 2300 UTC, and the video loops at 193, 131 and 304 do show a blowout from the large Southern sunspot group around 0200 UTC. The first one on LASCO seems to be an ejection from the Northwest (upper right) corner past the lim, so that one coincides with the video loops, but the potential CME at 0230 hasn't reached the LASCO C3 loop as yet. We'll have to wait and see.
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