Generic Space Environment Advisory
Issued by NWS

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NWXX04 KWNP 240121

Official Space Weather Advisory issued by NOAA Space Weather Prediction Center
Boulder, Colorado, USA

2015 August 23 at 7:18 p.m. MDT (2015 August 24 0118 UTC)


Summary For August 17-23

G1 (minor)  geomagnetic storms were observed on 17 and 23 August. G2 (moderate) geomagnetic storms were also observed on 23 August. This activity was due to effects from a pair of separate positive polarity coronal hole high speed streams.
R1 (minor) radio blackouts were observed on 21 and 22 August due to flare activity from active Region 2403.

Outlook For August 24-30

G1 (minor) geomagnetic storms are likely on 24 August due to effects from a pair of coronal mass ejections that left the Sun on 21 and 22 August.
R1 (minor) radio blackouts are likely on 24-29 August due to the flare potential from Region 2403.

Current space weather conditions at, and

Data used to provide space weather services are contributed by NOAA,
USAF, NASA, NSF, USGS, the International Space Environment Service (ISES)
and other observatories, universities, and institutions. For more
information, including email services, see SWPC`s Space Weather
Advisories Web site or (303) 497-5127. is the U.S. government's official web portal to all federal, state and local government web resources and services.