[Ips-geo-warning] IPS GEOMAGNETIC WARNING
rwc at ips.gov.au
Tue Dec 20 13:44:38 EST 2005
SUBJ: IPS GEOMAGNETIC DISTURBANCE WARNING 05/35
ISSUED AT 20/0227Z DECEMBER 2005
BY THE AUSTRALIAN SPACE FORECAST CENTRE.
A gradual increase in the solar wind speed has been
happening for the last few hours and the north-south
component of the interplanetary magnetic field has
also been showing fluctuations and southward orientation.
The cause of this disturbance is not very clear at this
stage, but a visibly weak coronal hole, which is currently
in a geoeffective position, may be responsible for this.
Geomagnetic activity may rise to active levels with
some possibility of isolated minor storm periods during
the rest of the UT day today.
INCREASED GEOMAGNETIC ACTIVITY EXPECTED
DUE TO CORONAL HOLE HIGH SPEED WIND STREAM
FOR 20 DECEMBER 2005
GEOMAGNETIC ACTIVITY FORECAST
20 Dec: Unsettled to active, isolated minor storm periods possible.
IPS Radio and Space Services email: asfc at ips.gov.au
PO Box 1386 WWW: http://www.ips.gov.au
Haymarket NSW 1240 AUSTRALIA FTP: ftp://ftp.ips.gov.au
tel: +61 2 9213 8010 fax: +61 2 9213 8060
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