Solar Activity Report for 7/7/04
- The most interesting thing to happen in the last couple of days was
something that was pointed directly away from us. A big, full-halo
CME erupted off of the back side of the sun. While not being
Earth-directed, it looked pretty impressive, as can be seen here :
Interestingly enough, it does seem to be pointed directly at Saturn.
It'll be interesting to see how Cassini, which is now in orbit around
Saturn, will register the event when it impacts Saturn's
magnetosphere. From the SOHO satellite EIT imagery, there appears to
be a sunspot region that's close to coming into view. The EIT imager
captures images in the extreme ultraviolet range, and sunspots radiate
strongly in ultraviolet. I'll also be curious to see whether or not
the sunspot that generated the back side CME holds together long
enough to rotate into view.
The current solar and geomagnetic conditions are :
NOAA sunspot number : 31
SFI : 79
A index : 4
K index : 1
Solar wind speed : 336.5 km/sec
Solar wind density : 2.7 protons/cc
Solar wind pressure : 0.5 nPa
IMF : 3.2 nT
IMF Orientation : 0.6 nT North
GOES-12 Background X-ray Flux level : A3
Conditions for the last 24 hours :
No space weather storms were observed for the past 24 hours.
Forecast in the next 24 hours :
No space weather storms are expected for the next 24 hours.
Solar activity forecast :
Solar activity is expected to be very low.
Geomagnetic activity forecast :
The geomagnetic field is expected to be quiet to unsettled.
Recent significant solar flare activity :