::Product: Report of Solar-Geophysical Activity
Issued: 2000 Mar 25 2200 UT
# 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 085 ISSUED AT 2200Z ON 25 MAR 2000
IA.  ANALYSIS OF SOLAR ACTIVE REGIONS AND ACTIVITY FROM  24/2100Z
TO 25/2100Z:  SOLAR ACTIVITY WAS LOW. REGION 8926 (S10W45) WAS THE
MOST ACTIVE REGION DURING THE PERIOD. THIS REGION PRODUCED SEVERAL
C-CLASS EVENTS, THE LARGEST BEING A C8/SF AT 25/0947UT. REGION 8926
DIMINISHED IN SIZE SLIGHTLY DURING THE DAY BUT ALSO DEVELOPED INTO A
MORE COMPLEX BETA-GAMMA MAGNETIC CLASSIFICATION. REGIONS 8924
(N10E41), 8925 (S18E50), AND 8928 (N19E45) WERE ALSO ACTIVE DURING
THE PERIOD PRODUCING ISOLATED OPTICAL SUBFLARES. THE REST OF THE
REGIONS WERE MOSTLY STABLE AND SHOWED VERY LITTLE ACTIVITY DURING
THE DAY. AN 20 DEGREE LONG, DISAPPEARING SOLAR FILAMENT (DSF) WAS
DETECTED NEAR S54E07.
IB.  SOLAR ACTIVITY FORECAST:  SOLAR ACTIVITY IS EXPECTED TO BE
MOSTLY LOW WITH THE POSSIBILITY OF ISOLATED M-CLASS EVENTS.
IIA.  GEOPHYSICAL ACTIVITY SUMMARY FROM 24/2100Z TO 25/2100Z:
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED. THE SOLAR WIND SPEED
BEGAN TO DECREASE DURING THE PERIOD, INDICATING THAT THE EARTH IS
MOVING OUT OF THE  HIGH-SPEED CORONAL HOLE STREAM.
IIB.  GEOPHYSICAL ACTIVITY FORECAST:  THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED.
III.  EVENT PROBABILITIES 26 MAR-28 MAR
CLASS M    40/40/40
CLASS X    10/10/10
PROTON     05/05/05
PCAF       GREEN
IV.  PENTICTON 10.7 CM FLUX
OBSERVED           25 MAR 205
PREDICTED   26 MAR-28 MAR  205/205/200
90 DAY MEAN        25 MAR 176
V.  GEOMAGNETIC A INDICES
OBSERVED AFR/AP 24 MAR  009/010
ESTIMATED AFR/AP 25 MAR  010/010
PREDICTED AFR/AP 26 MAR-28 MAR  010/012-008/010-008/010
VI.  GEOMAGNETIC ACTIVITY PROBABILITIES 26 MAR-28 MAR
A.  MIDDLE LATITUDES
ACTIVE                30/30/30
MINOR STORM           05/05/05
MAJOR-SEVERE STORM    01/01/01
B.  HIGH LATITUDES
ACTIVE                40/40/40
MINOR STORM           10/10/10
MAJOR-SEVERE STORM    01/01/01