Solar Activity Report for 5/18/05
- The space weather over this past weekend was definitely impressive to
witness. At one point, G-5 geomagnetic storm conditions existed.
Aurora were seen and photographed as far south as Arizona. Incredible
aurora pictures were captured all over North America, as can be seen
here : http://www.spaceweather.com/aurora/gallery_01may05_page2.htm .
So what's happening now? Well, the source of this past weekend's
action, sunspot region 759, is decaying and approaching the western
limb of the solar disk. It will soon be out of view. It did manage
to get off a parting shot. There was an M1.8 flare on the 17th, and
it produced a faint full-halo CME. It should be arriving at Earth
within the next 24 hours. Don't expect to see anything like what we
saw last weekend, but the activity level could kick back up a bit.
The current solar and geomagnetic conditions are :
NOAA sunspot number : 46
SFI : 84
A index : 13
K index : 2
Solar wind speed : 508.1 km/sec
Solar wind density : 2.3 protons/cc
Solar wind pressure : 1.0 nPa
IMF : 7.3 nT
IMF Orientation : 2.2 nT North
GOES-12 Background X-ray Flux level : A8
Conditions for the last 24 hours :
No space weather storms were observed for the past 24 hours.
Forecast for 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 to low with a chance for an
Geomagnetic activity forecast :
The geomagnetic field is expected to be quiet to active on 19 May as a
faint full halo CME, from 17 May, may arrive late in the day.
Unsettled conditions are expected on 20 May. Quiet to unsettled
conditions are expected on 21 May.
Recent significant solar flare activity :
17-May-2005 0239Z M1.8
16-May-2005 0908Z M1.6
16-May-2005 0243Z M1.4
15-May-2005 2236Z M3.5