2505Solar Activity Report for 8/16/05
- Aug 16, 2005** Aurora Watch In Effect **
The Earth is in the middle of a high-speed solar wind stream coming
from a coronal hole, and the solar wind speed is on the happy side of
680. The result has been at least one sighting in Alaska of some
impressive aurora, as can be seen here :
The effect is projected to last through the 19th. On the sunspot
side of things, there is but a single sunspot region visible, and it
doesn't appear to have the potential of generating a significant flare
at the present time.
The current solar and geomagnetic conditions are :
NOAA sunspot number : 49
SFI : 76
A index : 16
K index : 3
Solar wind speed : 689.7 km/sec
Solar wind density : 2.4 protons/cc
Solar wind pressure : 1.3 nPa
IMF : 4.8 nT
IMF Orientation : 3.2 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 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 with a slight chance for an
isolated C-flare from Region 797.
Geomagnetic activity forecast :
The geomagnetic field is expected to remain at unsettled to active
levels on 17 August. Activity should gradually decline on 18 August
and should be quiet to unsettled by 19 August as the coronal hole high
speed stream moves out of geoeffective position.
Recent significant solar flare activity :