:Product: 19990401RSGA.txt
:Issued: 1999 Apr 01 2200 UTC
# Prepared jointly by the U.S. Dept. of Commerce, NOAA,
# Space Environment Center and the U.S. Air Force.
#
JOINT USAF/NOAA REPORT OF SOLAR AND GEOPHYSICAL ACTIVITY
SDF NUMBER 091 ISSUED AT 2200Z ON 01 APR 1999
IA.  ANALYSIS OF SOLAR ACTIVE REGIONS AND ACTIVITY FROM  31/2100Z
TO 01/2100Z:  SOLAR ACTIVITY WAS VERY LOW.  THE REGIONS HAVE SHOWN NO
SIGNIFICANT CHANGE.  SOME MINOR SURGING WAS OBSERVED DURING THE
PERIOD ON THE NORTHEAST LIMB.  NO NEW REGIONS WERE NUMBERED.
IB.  SOLAR ACTIVITY FORECAST:  SOLAR ACTIVITY IS EXPECTED TO REMAIN
VERY LOW WITH THE CHANCE OF AN ISOLATED C-CLASS XRAY EVENT.
IIA.  GEOPHYSICAL ACTIVITY SUMMARY FROM 31/2100Z TO 01/2100Z:
THE GEOMAGNETIC FIELD RANGED FROM QUIET TO MINOR STORM LEVELS.  MINOR
STORM CONDITIONS WERE EXPERIENCED DURING THE 01/0000 - 0600Z
PERIODS.  THIS ACTIVITY IS BELIEVED TO BE RELATED TO A HIGH SPEED
CORONAL HOLE STREAM IMPACTING THE EARTH.
IIB.  GEOPHYSICAL ACTIVITY FORECAST:  THE GEOMAGNETIC FIELD IS
EXPECTED TO BE PREDOMINANTLY QUIET TO UNSETTLED.  ISOLATED ACTIVE TO
MINOR STORM LEVELS ARE POSSIBLE DURING THE NEXT THREE DAYS DUE TO
THE CONTINUATION OF AN ELONGATED CORONAL HOLE IN THE SOLAR SOUTHERN
HEMISPHERE.
III.  EVENT PROBABILITIES 02 APR-04 APR
CLASS M    01/01/01
CLASS X    01/01/01
PROTON     01/01/01
PCAF       GREEN
IV.  PENTICTON 10.7 CM FLUX
OBSERVED           01 APR 103
PREDICTED   02 APR-04 APR  104/106/108
90 DAY MEAN        01 APR 135
V.  GEOMAGNETIC A INDICES
OBSERVED AFR/AP 31 MAR  015/014
ESTIMATED AFR/AP 01 APR  016/015
PREDICTED AFR/AP 02 APR-04 APR  015/015-015/015-015/020
VI.  GEOMAGNETIC ACTIVITY PROBABILITIES 02 APR-04 APR
A.  MIDDLE LATITUDES
ACTIVE                30/30/30
MINOR STORM           10/10/10
MAJOR-SEVERE STORM    01/01/01
B.  HIGH LATITUDES
ACTIVE                35/35/35
MINOR STORM           15/15/15
MAJOR-SEVERE STORM    01/01/01