Routine Space Environment Product Issued Weekly
Issued by NWS
FXXX06 KWNP 020426
:Product: 7-day Space Weather Highlights
:Issued: 2015 Mar 02 0412 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
# 7-day Space Weather Highlights
Highlights of Solar and Geomagnetic Activity
23 February - 01 March 2015
Solar activity was at very low to low levels. A few weak C-class
flares were observed from Region 2294 (S14, L=023, class/area
Dai/090 on 28 Feb). Weak to mid-level flares were observed from
Region 2290 (N20, L=055, class/area Dai/070 on 24 Feb) including a
C5/Sf flare at 28/0939 UTC and a C6.8 flare at 01/1613 UTC. Numerous
CMEs were observed during the period including a pair of back-sided
full-halo CMEs observed early and late on 28 Feb. None of the CMEs
were determined to be Earth-directed.
No proton events were observed at geosynchronous orbit. However,
slight enhancements above background were observed on 23 Feb and
27-28 Feb due to back-sided activity.
The greater than 2 MeV electron flux at geosynchronous orbit was at
normal levels on 23-24 Feb and again on 01 Mar. Moderate levels were
observed on 25-28 Feb with a peak flux of 367 pfu observed at
Geomagnetic field activity was at quiet to minor storm levels on
23-24 Feb due to effects from a positive polarity, trans-equatorial
coronal hole high speed stream (CH HSS). Quiet to unsettled levels
predominated on 25 Feb through midday on 28 Feb. Activity increased
to quiet to minor storm levels midday on 28 Feb through 01 Mar due
to a co-rotating interaction region (CIR) in advance of a recurrent
negative polarity CH HSS.
Measurements from the ACE satellite indicated high speed winds near
550 km/s early on 24 Feb. IMF Bt peaked at 15 nT midday on 23 Feb
while the Bz component varied between +14 to -13 nT on 23-24 Feb.
Phi angle was in a predominately positive (away) sector through
early on 27 Feb.
Wind parameters decayed to nominal conditions through midday on 28
Feb when CIR effects were observed through the end of the period.
Wind speeds increased to near 600 km/s early on 01 Mar. IMF Bt
increased to a peak of 14 nT by 28/2000 UTC while the Bz component
rotated between +8 nT to -10 nT from late on the 28th through early
on the 1st. Phi angle was in a mostly negative (towards) sector,
with some positive rotation, from early on 27 Feb through the end of