Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ncar!unmvax!ariel!hydra.unm.edu!ee5391aa From: ee5391aa@hydra.unm.edu (Duke McMullan n5gax) Newsgroups: sci.electronics Subject: solar flares/magnetic flux Keywords: compass, magnetic declination, cave, survey, cave survey Message-ID: <604@ariel.unm.edu> Date: 25 Sep 89 02:14:15 GMT Sender: news@ariel.unm.edu Reply-To: ee5391aa@hydra.unm.edu (Duke McMullan n5gax) Organization: University of New Mexico, Albuquerque, NM Lines: 22 A friend of mine heard that solar flare activity can affect local magnetic declination by as much as +/- 5 degrees over a period of a few days. We are curious about this, because those of us who survey caves frequently rely on magnetic instruments, rather than more accurate but much harder to use transits or theodolites. Does anyone out there KNOW anything about this? (Conjecture is fine, but please label it clearly.) Minding inquires know want to, d cc: Cavers' mailing list -- Generic Apophthegmatic Statement -- Duke McMullan n5gax nss13429r phon505-255-4642 ee5391aa@hydra.unm.edu