13/1430UT - X 6.2 -- kleine Textsammlung

[Herwig, Rostock]

Hallo,

ohne Anspruch auf Vollständigkeit hier einiges. Berauschend sieht's nicht aus. Der Hauptteil des CME ging ziemlich stark nach Norden raus - mit etwa 75° (ca.325°-40°) Öffnung, der Rest macht einen schwachen Eindruck.
SpW.com und RSGA lesen sich aber vage leicht optimistisch.
Im Bilderverz. der Halo Mail ist der vorletzte Link (EIT diff.mpg)
interessant, sonst auch die anderen rdiff.mpg (schnell zu laden).

Gruß Herwig

RSGA:
IIA. Geophysical Activity Summary 12/2100Z to 13/2100Z: The geomagnetic field was at mostly
quiet levels, with an isolated unsettled period at 12/21-2400 UTC. IIB. Geophysical Activity
Forecast: The geomagnetic field is expected to be at quiet to unsettled conditions on the first day of
the forecast period. The CME produced by the X6.2 flare should impact earth late on the second
day. The impact is expected to produce active conditions on the second and third days. Imagery from
the LASCO/SOHO spacecraft show that most of the CME is directed in a predominately Northerly
direction, hence the expected effect on Earth should be significantly less than if the CME was more
directly aimed toward Earth.

SpW.com:
SOLAR ACTIVITY: Twisted magnetic fields above sunspot 9733 erupted today at 1430 UT. The
explosion sparked a powerful -category solar flare and hurled a coronal mass ejection into space. Although
the CME (pictured right) was not squarely Earth-directed there is a chance that it will deliver a glancing blow
to our planet's magnetosphere as early as Dec. 15th. High-latitude sky watchers should remain alert for
auroras this weekend. (A from an earlier eruption could arrive on Dec. 14th -- but it has less potential for
triggering geomagnetic activity.)

STD (wenig hoffnungsvoll bis kann man vergessen):
Name: peter, pa1six
Date: Thu, 13 Dec 2001 15:06:28 -0700
Subject: Re: Huge CME ?

Well, I'm not seeing it. Nice, but mostly non-earth directed. Maybe an extremely faint full-halo at the
very best. I'd say pretty useless, but what can be expected of a X6.2 pulse. Nice flare for its number,
but just a very short duration.

Halo Mail Archive
Date: Thu, 13 Dec 2001 22:53:23 +0000 (GMT)
From: Kevin Schenk
Subject: Partial HALO CME on 2001/12/13

UCMEO 93001 11213 2220/
11213 61454 92023 2801/ 135// 233// 20535
11213 61424 81436 11418 09733 1222/
99999

BT

EIT and LASCO observed a partial HALO CME event Thursday 2001/12/13. The
event was first seen in C2 begining at 14:54 UT as a bright symetrical
loop front in the NorthEast. The emission spanned PA 280-135 degrees.
Slow multiple looping structures with core followed the front. The
observation for C2 was poor due to a synoptic image gap 15:00-16:18 UT for
calibration program. The event was first seen in C3 begining 16:18-20:30
UT. We calculated the plane-of-sky speed only through C3 field to 535
km/sec at PA 4 degrees. The event was in progress at the first C3 image.

The event was seen in EIT 195A begining at 14:24-14:36 UT as a bright
flare of AR 9733 [N14; E18]. The calibration cut the EIT observation of
the event at 14:48. Post event loops were still visible at 16:24 when
images resumed. GOES reports a X6.2 class x-ray flare of AR 9733 at 14:20
UT. This is probably related to the events seen in EIT and LASCO.

Images and movies are available on the Lasco FTP server at:

ftp://ares.nrl.navy.mil/pub/lasco/halo/20011213/