Report of Solar Geophysical Activity

Joint USAF/NOAA Solar Geophysical Activity Report and Forecast
SDF Number 257 Issued at 2200Z on 14 Sep 2015

IA.  Analysis of Solar Active Regions and Activity from 13/2100Z to
14/2100Z: Solar activity has been at very low levels for the past 24
hours. There are currently 3 numbered sunspot regions on the disk.
IB.  Solar Activity Forecast: Solar activity is expected to be very low
with a chance for a C-class flares on days one, two, and three (15 Sep,
16 Sep, 17 Sep).

IIA.  Geophysical Activity Summary 13/2100Z to 14/2100Z: The geomagnetic
field has been at quiet to minor storm levels for the past 24 hours.
Solar wind speed, as measured by the ACE spacecraft, reached a peak
speed of 545 km/s at 14/1354Z. Total IMF reached 10 nT at 14/0855Z. The
maximum southward component of Bz reached -8 nT at 14/0900Z. Electrons
greater than 2 MeV at geosynchronous orbit reached a peak level of 7601
pfu.
IIB.  Geophysical Activity Forecast: The geomagnetic field is expected
to be at unsettled to minor storm levels on day one (15 Sep), unsettled
to active levels on day two (16 Sep) and quiet levels on day three (17
Sep).

III.  Event probabilities 15 Sep-17 Sep
Class M    05/01/01
Class X    01/01/01
Proton     01/01/01
PCAF       green

IV.  Penticton 10.7 cm Flux
Observed           14 Sep 097
Predicted   15 Sep-17 Sep 095/095/095
90 Day Mean        14 Sep 106

V.  Geomagnetic A Indices
Observed Afr/Ap 13 Sep  008/011
Estimated Afr/Ap 14 Sep  014/018
Predicted Afr/Ap 15 Sep-17 Sep  015/020-015/018-007/008

VI.  Geomagnetic Activity Probabilities 15 Sep-17 Sep
A.  Middle Latitudes
Active                35/30/20
Minor Storm           20/15/05
Major-severe storm    05/01/01
B.  High Latitudes
Active                10/10/20
Minor Storm           30/25/30
Major-severe storm    55/45/25

Radio Events Observed 14 Sep 2015
A.  245 MHz Bursts
Start  End   Peak Flux  Time of Peak  Duration
2123   2123    120          2123        0000  
B.  245 MHz Noise Storms
No 245 MHz Noise Storms Observed.

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2248
Begin Time: 2015 Sep 10 1020 UTC
Yesterday Maximum 2MeV Flux: 7602 pfu