From nitta@lmsal.com Wed Mar 2 14:12:50 2005 Return-Path: Received: from lmsal.com (mail.lmsal.com [198.116.7.6]) by sv01.scs.gmu.edu (8.13.1/8.12.8) with ESMTP id j22JCngj006068 for ; Wed, 2 Mar 2005 14:12:50 -0500 Received: from [198.116.7.249] (account nitta HELO lmsal.com) by lmsal.com (CommuniGate Pro SMTP 4.2.9) with ESMTP id 3018234; Wed, 02 Mar 2005 11:10:28 -0800 Message-ID: <42260FA4.609@lmsal.com> Date: Wed, 02 Mar 2005 11:10:28 -0800 From: Nariaki V Nitta Organization: LMSAL User-Agent: Mozilla/5.0 (X11; U; SunOS sun4u; en-US; rv:1.6) Gecko/20040116 X-Accept-Language: en, fr, de, cs, ja, zh MIME-Version: 1.0 To: Vasyl Yurchyshyn , Jie Zhang CC: Seiji Yashiro , Nat Gopalswamy , Webb David F Contr AFRL/VSBX , Cliver Edward W Civ AFRL/VSBXS Subject: question on event 4 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Status: RO X-UID: 25028 Content-Length: 1285 X-Keywords: X-Evolution-Source: imap://jiez@mail.scs.gmu.edu/ X-Evolution: 00000002-0010 Hello, I think I told you that I would produce my own list of solar sources of the 77 CDAW storms. As you can imagine, this turns out to be way too much for the time before the CDAW. Last year, I actually proposed a similar study as a three-year project. As I go through the list posted at workshop Web site, what is obvious to others may not necessary be obvious to me. For example, what is the solar source of event 4, 11-Oct-1997? Both Jie and Nat show the CME of 6-Oct-1997 15:28 UT. But I have difficulty pin-pointing the low coronal signatures of this flux-rope like CME. Was it the eruption of a big filament? I looked at Vasyl's directory http://cdaw.gsfc.nasa.gov/geomag_cdaw/data/cdaw1/yurchyshyn/event004/, and found that the big filament was already absent at 15:28:16 UT, but EIT images suggest that the filament moved to SW rather than SW. Is the disappearance of this big filament, not the one shown in http://cdaw.gsfc.nasa.gov/geomag_cdaw/data/cdaw1/yurchyshyn/event004/bbso_halph_ri_19971006_frames.png, the source of the CME and the storm? I would like to study the timings in detail of the filament eruption and the CME, and may come up with a different scenario. Just to let you know life is not so simple to me. Best wisehs, Nariaki From vayur@bbso.njit.edu Wed Mar 2 14:42:33 2005 Return-Path: Received: from bbsoweb.bbso.njit.edu (mail.bbso.NJIT.EDU [4.23.3.33]) by sv01.scs.gmu.edu (8.13.1/8.12.8) with ESMTP id j22JgXBj007111 for ; Wed, 2 Mar 2005 14:42:33 -0500 Received: from aten.bbso.njit.edu (aten.bbso.njit.edu [4.23.3.57]) by bbsoweb.bbso.njit.edu (8.11.6/8.11.6) with ESMTP id j22JafR01658; Wed, 2 Mar 2005 11:36:51 -0800 Received: from arrow.bbso.njit.edu (IDENT:xTwS3RRu5udA0FOH6mG6jUOihfaBIM+n@arrow.bbso.njit.edu [4.23.3.68]) by aten.bbso.njit.edu (8.12.11/8.12.8) with ESMTP id j22Jccjf030243; Wed, 2 Mar 2005 11:38:38 -0800 From: Vasyl Yurchyshyn Reply-To: vayur@bbso.njit.edu Organization: NJIT/BBSO To: Nariaki V Nitta Subject: Re: question on event 4 Date: Wed, 2 Mar 2005 11:38:38 -0800 User-Agent: KMail/1.6.2 Cc: Jie Zhang , Seiji Yashiro , Nat Gopalswamy , Webb David F Contr AFRL/VSBX , Cliver Edward W Civ AFRL/VSBXS References: <42260FA4.609@lmsal.com> In-Reply-To: <42260FA4.609@lmsal.com> MIME-Version: 1.0 Content-Disposition: inline Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <200503021138.38403.vayur@bbso.njit.edu> Status: RO X-UID: 25029 Content-Length: 2587 X-Keywords: X-Evolution-Source: imap://jiez@mail.scs.gmu.edu/ X-Evolution: 00000004-0010 While producing Halpha images and movies I also was surprised that for some events I did not find any (or noticeable) coronal and/or chromospheric signatures which could be related to the CME. Or, sometimes I saw activity that occurred simultaneously with the one indicated in the table, but far away from it. Therefore I tend to agree with Nariaki that some identifications are not clear, at least to me. It is probably because I do not have all data on those events and I hope that our workshop will resolve those questions. Some clarification on the Halpha data and LFFF modeling that I provide. Since, as Nariaki noted, it requires a lot of time to go through each event in detail, I use the identifications that are provided in the master table and in Seiji and Nat table to produce hi res images and movies. At the same time, available full disk Halpha movies as well as EIT data will allow us to look at other surface activity if needed. Best, Vasyl > As I go through the list posted at workshop Web site, what is obvious to > others may not necessary be obvious to me. For example, what is the > solar source of event 4, 11-Oct-1997? Both Jie and Nat show the CME of > 6-Oct-1997 15:28 UT. But I have difficulty pin-pointing the low coronal > signatures of this flux-rope like CME. Was it the eruption of a big > filament? I looked at Vasyl's directory > http://cdaw.gsfc.nasa.gov/geomag_cdaw/data/cdaw1/yurchyshyn/event004/, > and found that the big filament was already absent at 15:28:16 UT, but > EIT images suggest that the filament moved to SW rather than SW. Is the > disappearance of this big filament, not the one shown in > http://cdaw.gsfc.nasa.gov/geomag_cdaw/data/cdaw1/yurchyshyn/event004/bbso_h >alph_ri_19971006_frames.png, the source of the CME and the storm? I would > like to study the timings in detail of the filament eruption and the CME, > and may come up with a different scenario. > > Just to let you know life is not so simple to me. > > Best wisehs, > > Nariaki -- -------------------------------------------------------------------------- See Recent H-alpha Movies at http://www.bbso.njit.edu/Research/Events ========================================================================== Dr Vasyl B. Yurchyshyn Fax: +1 (909) 866-4240 Big Bear Solar Observatory Phone: +1 (909) 866-5791 x 35 40386 North Shore Lane email: vayur@bbso.njit.edu Big Bear City, CA 92314-9672 http://www.bbso.njit.edu/~vayur --------------------------------------------------------------------------