Solar Activity Report for 8/18/03
- ** G-1 Geomagnetic Storm In Progress **
** Aurora Watch In Effect **
The intense activity from last night has died down quite a bit, but
geomagnetic storm conditions are still going, thus the aurora watch.
At one point, the K index was all the way up to 8, and a G-4 (severe)
geomagnetic storm conditions were observed. Aurora were spotted and
photographed all over Canada and the northern US. In fact, weak
aurora were spotted as far south as, get this now, San Diego, CA. No
kidding! See this link for some great aurora pictures, including the
one of the sky over San Diego glowing a pale pink on the northern
The active conditions will likely persist for a few more days,
although most likely not with last night's intensity. The Earth will
soon be moving into a high speed coronal hole solar wind steam, and we
should see the solar wind speed pick up along about Wednesday.
The current solar and geomagnetic conditions are :
NOAA sunspot number : 104
SFI : 116
A index : 65
K index : 5
Solar wind speed : 423.9 km/sec
Solar wind density : 2.0 protons/cc
Solar wind pressure : 0.7 nPa
IMF : 16.6 nT
IMF Orientation : 10.0 nT North
Conditions for the last 24 hours :
Space weather for the past 24 hours has been severe. Geomagnetic
storms reaching the G4 level occurred.
Forecast for the next 24 hours :
Space weather for the next 24 hours is expected to be minor.
Geomagnetic storms reaching the G1 level are expected.
Solar activity forecast :
Activity is expected to be a low levels. There is a slight chance of
an isolated M-class event from Region 431 or Region 436.
Geomagnetic activity forecast :
The geomagnetic field is expected to range from quiet to minor storm
levels. Geomagnetic storming is expected diminish on day one with
isolated minor storm levels possible. Quiet to unsettled conditions
are expected on day two and day three of the period.
Recent significant solar flare activity :