Earth Weather / Space Weather

Solstice

By: Susie77, 4:10 PM GMT on December 21, 2006

A most blessed Yule to you all -- may the return of the sun bring all that you wish for.

Permalink

Mid Latitude Aurora Borealis Warning

By: Susie77, 8:54 PM GMT on December 14, 2006

From Solar Terrestial Dispatch

[Note text in bold italic!]


MIDDLE LATITUDE AURORAL ACTIVITY WARNING
Updated: 06:15 UTC on 13 December 2006
Solar Terrestrial Dispatch
www.spacew.com


VALID BEGINNING AT: 00:00 UTC ON 14 DECEMBER
VALID UNTIL: 23:00 UTC (5 pm EDT) ON 15 DECEMBER

HIGH RISK PERIOD: 14 DECEMBER (UTC DAYS)
MODERATE RISK PERIOD: 14 - 15 DECEMBER

PREDICTED ACTIVITY INDICES: 15, 70, 30, 15 (13 - 16 DECEMBER)

POTENTIAL MAGNITUDE OF MIDDLE LATITUDE AURORAL ACTIVITY: HIGH

POTENTIAL DURATION OF THIS ACTIVITY: MAIN BELT = 12 HOURS
MINOR BELT = 12-24 HOURS

ESTIMATED OPTIMUM OBSERVING CONDITIONS: NEAR AND AFTER LOCAL MIDNIGHT

EXPECTED LUNAR INTERFERENCE: MODERATE AFTER LOCAL MIDNIGHT

OVERALL OPPORTUNITY FOR OBSERVATIONS FROM MIDDLE LATITUDES: GOOD TO VERY GOOD

AURORAL ACTIVITY *MAY* BE OBSERVED APPROXIMATELY NORTH OF A LINE FROM...
(THIS LINE IS VALID *ONLY* IF FAVORABLE STORM CONDITIONS OCCUR)

NORTHERN CALIFORNIA TO NORTHERN NEVADA TO COLORADO TO KANSAS TO SOUTHERN
MISSOURI TO TENNESSEE TO NORTH CAROLINA.


SYNOPSIS...

A powerful and well-directed solar flare from active solar Region 930
was observed early on 13 December. This event has the potential to produce
periods of moderate to strong (possibly even intense) auroral storm activity
on 14 December, possibly lingering into 15 December. The most intense phase
of activity is likely to occur some hours after the initial impact, which is
currently expected near 07:00 UTC on 14 December (2 am EST on 14 December).
The moon will begin to impinge on observations after it rises sometime after
local midnight, so the best observations (if possible) will occur prior to
and near local midnight when the moon is still below the horizon.

This warning will remain valid through 24:00 UTC (5 pm EST) on
15 December. It will be updated or allowed to expire at that time. For
updated information, visit: http://www.spacew.com/aurora/forum.html. For
real-time plots of current activity, visit: http://www.spacew.com/plots.html

PLEASE REPORT VALID OBSERVATIONS OF AURORAL ACTIVITY TO: http://www.spacew.com/submitsighting.html

Permalink

A Night for Sky Watching

By: Susie77, 6:43 PM GMT on December 14, 2006

Tonight after dark, under clear skies, you may be treated to two beautiful events -- the tail end of the Geminid meteor shower, and the aurora borealis!

More information

Permalink

Massive Solar Flare!

By: Susie77, 3:33 PM GMT on December 05, 2006

For you space weather fans, the sun let loose an X-class solar flare this morning:

Solar Flare

This one was not Earth-directed, but as the sun's rotation brings the sunspot that spawned it around, we could be in for a night or two of the aurora. Stay tuned for more!

Permalink

About Susie77

Sometimes I complain about the earthly weather, but mostly I like to post about astronomy and space events. Hope you enjoy the articles.