X1,5 2427 km/s !!! Wahnsinn...

[Lutz Schenk]

Hab gerade Lasco-Mail bekommen...

UCMEO 93001 20421 1600/
20421 60127 90342 1401/ 042// 333// 42427
20421 70048 80248 31484 09906 1122/
99999
BT

EIT and LASCO observed a partial HALO CME on 2002/04/21. The event was
first seen in the Lasco C2 field beginning 01:27 UT as a bright dual loop
front into the field at 4Rs. This extremely fast front was followed by
cavity and core with material spanning the West hemisphere, PA 140-42
degrees. The event entered the C3 field at 01:42 with acceleration and
was tracked to 28Rs with a plane-of-sky speed averaged through both fields
to 2427 km/sec at PA 273. Large proton flux is seen in white light
images.

EIT observed multi events contributing to the CME witnessed in the Corona.
Beginning 00:12 UT a CME from AR 9907 located at [S03; W56] takes off with
West direction. By 00:48 UT a flare starts in AR 9906 at location
[S14;W84] which produces a NW,SE EIT wave and triggers a filament channel
eruption at 01:48 UT East with SE direction at location [S17;W58]. Bright
post event arcade follows. This in total produced a complex CME event with
large emission. Proton flux is seen in the EUV images.

GOES shows a long duration M1.5 class x-ray flare between 00:43-02:38 UT.
This event is probably related to the events seen in LASCO.

Images and movies are available on the ftp server at:

ftp://ares.nrl.navy.mil/pub/lasco/halo/20020421/

note: we have been notified of some download problems with the images and
movies. This seems to be due to security upgrades and the use of older
versions of Netscape and IE below versions 6. We are still working on
this. We applogize for the inconvenience if any.

Best reguards,

Kevin Schenk
EIT and LASCO Operations
NASA-Goddard Space Flight Center, USA

http://lasco-www.nrl.navy.mil/mail/halo_mail/167.html

Gruß Lutz

P.S. Habe nix familiär mit Kevin zu tun

[Herwig, Rostock]

... aus C3, 512x, 0142/0218, PA 273.
Schöner Kracher, leider eine Woche zu spät.
mit 70% von 2427 und 147 Mio gerechnet, wäre das Ding in 24 h hier.

Gruß Herwig

> Hab gerade Lasco-Mail bekommen...

> UCMEO 93001 20421 1600/
> 20421 60127 90342 1401/ 042// 333// 42427
> 20421 70048 80248 31484 09906 1122/
> 99999
> BT

> EIT and LASCO observed a partial HALO CME on 2002/04/21. The
> event was
> first seen in the Lasco C2 field beginning 01:27 UT as a bright
> dual loop
> front into the field at 4Rs. This extremely fast front was
> followed by
> cavity and core with material spanning the West hemisphere, PA
> 140-42
> degrees. The event entered the C3 field at 01:42 with
> acceleration and
> was tracked to 28Rs with a plane-of-sky speed averaged through
> both fields
> to 2427 km/sec at PA 273. Large proton flux is seen in white
> light
> images.

> EIT observed multi events contributing to the CME witnessed in
> the Corona.
> Beginning 00:12 UT a CME from AR 9907 located at [S03; W56]
> takes off with
> West direction. By 00:48 UT a flare starts in AR 9906 at
> location
> [S14;W84] which produces a NW,SE EIT wave and triggers a
> filament channel
> eruption at 01:48 UT East with SE direction at location
> [S17;W58]. Bright
> post event arcade follows. This in total produced a complex CME
> event with
> large emission. Proton flux is seen in the EUV images.

> GOES shows a long duration M1.5 class x-ray flare between
> 00:43-02:38 UT.
> This event is probably related to the events seen in LASCO.

> Images and movies are available on the ftp server at:

> ftp://ares.nrl.navy.mil/pub/lasco/halo/20020421/ note: we have
> been notified of some download problems with the images and
> movies. This seems to be due to security upgrades and the use of
> older
> versions of Netscape and IE below versions 6. We are still
> working on
> this. We applogize for the inconvenience if any.

> Best reguards,

> Kevin Schenk
> EIT and LASCO Operations
> NASA-Goddard Space Flight Center, USA

> http://lasco-www.nrl.navy.mil/mail/halo_mail/167.html Gruß
> Lutz

> P.S. Habe nix familiär mit Kevin zu tun

[Peter Kuklok]

Hi Herwig,

schön, dass Du auch wieder mit_PoS_t
Ich glaub einen höheren PoS-Wert hat das LASCO-Team bisher noch nicht ermittelt. Die Megaflares vom letzten Jahr dürften auch nicht sehr viel schneller gewesen sein. 1859 soll es einen CME gegeben haben, der die Strecke Sonne-Erde innerhalb von rund 17 Stunden schaffte. Bei einem besseren Timing hätte das damalige Event diese Woche wohl echte Konkurrenz bekommen...wirklich schade.

Der heutige Type II Wert dazu ist dagegen ein echter Witz: 742 km/s

Grüße
Peter

[Peter Wloch]

Space Weather News for April 21, 2002
http://www.spaceweather.com

A BIG SOLAR BLAST: An explosion on the Sun today sparked a powerful
X-class solar flare and hurled a coronal mass ejection (CME) into space.
Although the CME was not squarely Earth-directed, the expanding cloud will
likely deliver a glancing blow to Earth's magnetosphere on April 22nd or
23rd. Sky watchers should remain alert for renewed geomagnetic activity
and auroras.

A LITTLE METEOR SHOWER: The annual Lyrid meteor shower peaks on April
22nd. Early-rising northern sky watchers could see 10 or so meteors per
hour shooting from the vicinity of the bright star Vega before local dawn
on Monday.

SOUTHERN CALIFORNIA AURORAS: A pair of coronal mass ejections swept past
Earth last week and ignited several days of geomagnetic activity.
Although the most intense Northern Lights were concentrated above
high-latitudes, photographers recorded auroras as far south as Arizona and
Southern California in the United States.

Visit spaceweather.com for images and more information about all these
events.

---

Gruss
Peter

[Ulrich Rieth]

Hi Peter!

Wenn Du die LASCO Mail genau liest, siehst Du, dass der X1 einen Filament-Kollaps getriggert hat.
Einen Type II bei dem gewaltigen Lärm im Radiospektrum zu messen, ist unmöglich. Der Type II mit 700+ km/s ist derjenige, der zum Filament gehört. Da dieses etwas später kam, ist der Hauptlärm im Radioband schon weg gewesen.
Die 700 stimmen also.
Gruß

Ulrich

[Peter Kuklok]

> Wenn Du die LASCO Mail genau liest, siehst Du, dass der X1 einen
> Filament-Kollaps getriggert hat.
> Einen Type II bei dem gewaltigen Lärm im Radiospektrum zu
> messen, ist unmöglich. Der Type II mit 700+ km/s ist derjenige,
> der zum Filament gehört. Da dieses etwas später kam, ist der
> Hauptlärm im Radioband schon weg gewesen.
> Die 700 stimmen also.

Hi Ulrich,

ja, das würde den niedrigen Wert erklären. Komisch (für mich) ist allerdings, dass der Type II bereits um 0125UT in Australien registriert wurde, aber die Filamenteruption lt. LASCO-Mail erst um 0148UT getriggert wurde.

Grüße
Peter