It was a Vandenburg Minuteman II launch, its the first test of the Star Wars system.
check out: http://www.vafb.af.mil/news_flash
On Sat, 2 Oct 1999, Eugene Leitl wrote:
> Date: Sat, 2 Oct 1999 19:21:39 -0700 (PDT)
> From: Eugene Leitl <firstname.lastname@example.org>
> Reply-To: email@example.com
> To: firstname.lastname@example.org, email@example.com
> Subject: Edwards base launch (L.A. area)
> Has anybody seen the Edwards base launch a couple of minutes ago? The
> sky is covered with beauuutiful stratospheric silver clouds. (I can
> only hope I won't see many such launches in the next half an hour).
> Has anybody any idea what that was? Military sat launch, THAAD, whatever?