Solar Sector Boundary Crossing on January 21st, 2014: ACEs Real-Time Shock Page shows that we took two Interplanetary Shocks yesterday evening at 17:24 and 17:56 UTC, respectively. ACE Solar Wind Telemetry shows the speed (yellow) up around 315 km/s, while the density (orange) is currently up between 8 to 10 protons/cm^3. Solar Wind speed rose up over 300 km/s last night, topping out around 350 km/s with a density of about 9 protons/cm^3, which was just enough o push the KP-Index from KP-0 to KP-3 to kick off the new day. Looking at the BZ (red component) we see that the Earths EMF had been tipping south for most of the morning, and is currently around 0 North polarity. NOAAs GOES Magnetometer and Electron Flux both show the more sensitive impacts to Earths shields. KP-Index is currently at KP-2. According to TESIS Sun Flare Monitor (GOES-15) we took a total of just 5 C-Class Solar Flares yesterday despite the Sunspot Number surging up to 131. The largest Solar Flare yesterday was a C3.6-Class out of AR 1963, which peaked at 22:49 UTC; the first was a C3.4-Class Flare out of AR 1959 at 02:20 UTC. Dr. Tony Phillips gave us a little bit to work with, saying that today would mark a: SOLAR SECTOR BOUNDARY CROSSING: High-latitude auroras are possible on Jan. 21st when Earth crosses through a fold in the heliospheric current sheet. This is called a solar sector boundary crossing, and NOAA forecasters estimate a 25% chance of polar geomagnetic storms when it occurs… Read, See More: spaceweather/ Now lets look to Stanfords, Sector Boundaries in the Solar Wind, for more info: The solar wind in the ecliptic plane is organized in such a way that it generally has 2 or 4 sectors per solar rotation (27 days) within which the magnetic field is pointed generally toward or away from the Sun. The surface separating the polarities is called the Heliospheric Current Sheet. Sector boundaries are the times observed at Earth when the polarity of the interplanetary magnetic field (IMF) reverses. Well defined sector boundaries are those boundaries for which there is good data, the reversal takes place cleanly, and intervals on either side of the boundary have a uniform field direction for ~4 days. Over the years a number of sector boundary lists have been compiled. They depend on interplanetary magnetic field polarities inferred from geomagnetic observations and observed by spacecraft… Source, Sector Boundary Lists: wso.stanford.edu/SB/SB.html Image Sources: n3kl.org/sun/noaa.html srl.caltech.edu/ACE/ASC/DATA/Shocks/index.html iswa.ccmc.gsfc.nasa.gov/IswaSystemWebApp/ swpc.noaa.gov/ace/ Daily News: suspicious0bserverscollective.org/daily-news.html Evening News: suspicious0bservers.org/premium/ TESIS The Sun Shines for Everyone: tesis.lebedev.ru/en/sun_flares.html GONG H Alpha: halpha.nso.edu/ Moscow Neutron Monitor: cr0.izmiran.rssi.ru/mosc/main.htm BARTOL Cosmic Ray: neutronm.bartol.udel.edu//spaceweather/welcome.html U of Maryland Solar Wind Data: umtof.umd.edu/pm/ NOAAs Sunspot Classification: swpc.noaa.gov/ftpdir/latest/SRS.txt NOAA Aurora: swpc.noaa.gov/Aurora/ NOAAs Forecast Discussion: swpc.noaa.gov/ftpdir/latest/forecast_discussion.txt
Posted on: Tue, 21 Jan 2014 10:55:38 +0000
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