Routine Space Environment Product Issued Weekly
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1
000
FXXX06 KWNP 190425
WEKHIL

:Product: 7-day Space Weather Highlights
:Issued: 2018 Feb 19 0416 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
# http://www.swpc.noaa.gov/wwire.html
#
#                7-day Space Weather Highlights
#
Highlights of Solar and Geomagnetic Activity
12 - 18 February 2018

Solar activity was at very low levels on 13-18 Feb and low levels on
12 Feb. The strongest flare of the period was a C1 from Region 2699
(S07, L=165, class/area Dai/240 on 10 Feb) at 12/0135 UTC. The event
produced an associated asymmetric halo signature first observed in
SOHO/LASCO C2 imagery at 12/0125 UTC. Analysis and modeling of the
event suggested arrival of the CME at Earth on 15 Feb.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit was at
background levels 12-16 Feb. An increase to moderate levels on 17
Feb and to high levels on 18 Feb was observed in response influence
from a negative polarity CH HSS.

Geomagnetic field activity ranged from quiet to active levels. Quiet
conditions were observed on 12-14 Feb. On 15 Feb, arrival of the 12
Feb CME produced only one isolated period of active during the day.
Total magnetic field strength increased to a peak of 15 nT around
16/0530 UTC while Bz remained mostly positive. Solar wind speeds
were relatively slow, between 300-400 km/s through the event. Active
levels were reached again on 17 and 18 Feb in response to influence
from a negative polarity CH HSS. Solar wind speeds continued to
increase over the two days to a peak of about 600 km/s late on 18
Feb.



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.