AstroAlert: INTENSE AURORA IN-PROGRESS - 2nd Chanc

[Bernhard Dorner]

A s t r o A l e r t

Sun-Earth Alert

Solar Terrestrial Dispatch

http://www.spacew.com

(very hard to get on right now)

(due to overwhelming traffic)

29 October 2003

INTENSE AURORA IN-PROGRESS

Very quick notice to everyone that TONIGHT should be a relatively good
night for middle latitude observers to see auroral activity. Europe is being
blessed with an impressive display. The disturbance is rapidly weakening and
probably won't be quite as impressive over North America as it was last
night, but should still be widely visible. Last night's display was visible
into Arizona. Unfortunately, much of the east was under a heavy cloud deck.

For those who were clouded out - you'll get a second chance. Region 486
just a few hours ago produced another major class X10 solar flare at 20:49
UTC (1:49 pm EST) on 29 October. It has been confirmed to be associated with
another strongly Earthward-directed coronal mass ejection (a beautiful
full-halo event). It has also thrown out another batch of energetic protons,
which will make a mess of the SOHO spacecraft cameras, spacecraft star
trackers and loads of other electronic gadgets floating in space.

We don't yet know when this next disturbance will impact. It's still far
too early. Perhaps tommorrow night. Another AstroAlert will be posted to
advise the public when more is known.

** End of the AstroAlert Bulletin **

[Peter Kuklok]

Ich komme auf irgendwas um die 1800km/s. Dürfte also unter 2000km/s liegen, wenn ich mich jetzt nicht völlig verhauen hab *gäääähn* ...muss ich dann morgen nochmal überprüfen.
Zum Vergleich, beim ersten Megaflare-CME kam ich auf knapp 2280 km/s.

Grüße
Peter

[Peter Kuklok]

Aus dem STD-Forum

Name: Cary Oler
Date: Wed, 29 Oct 2003 23:22:38 -0000
Subject: (STD-Forum) Estimated velocity of the most recent CME

SOHO scientists are estimating the plane of sky velocity of this latest
X10-flare-associated coronal mass ejection at 1,948 kilometers per second.
That's just a tad under the velocity of the X17 event. We will have an
impact assessment published on this list after enough data arrives to start
working the models.

[Bernhard Dorner]

Hi Peter,

hab mal kurz gerechnet: vom Maximum bis ACE waren es 18h50m, d.h. eine Durchschnittsgeschwindigkeit von 2192km/s. Schon ganz ordentlich. Wenn ich nun Lutz' Regel mit dem Faktor 0,7 anwende (aber gilt die da überhaupt?), war die radiale Geschwindigkeit sogar 3132km/s. Huiiii....

Mal sehen, was der aktuelle so mit sich bringt.

Ciao
Bernhard