Judging from the freq, it could have been a pirate goofing around.
From: (Bill O. Rights)
Organization: http://groups.google.com
Newsgroups: rec.radio.shortwave
Date: 4 Jun 2004 18:05:09 -0700
Subject: Spanish numbers station 6925
6925AM 0100-1013utc SIO434
Female started message by saying "the northern lights are visible",
then went into a series of numbers, repeated 3 times. Ended with a
map coordinate, I believe, 40 degree's north and "find your way".
Anyone else hear this, and have any idea what or who it is?