Message:21048 In: SPACWX.USA
From: N4SDDate: Sat, 18 Apr 26 04:16:00 Z
Newsgroups: SPACWX.USA
Subject: Space Weather Message Code: ALTK04
Message-ID: <11393_N4SD>
Path: N2MH4|N3MEL|N3FUD|N3IP|KA3VSP|N4SD
R:260418/1846Z 30368@N2MH4.#SENC.NC.USA.NOAM LinBPQ6.0.24
R:260418/1846Z 15916@N3MEL.#EPA.PA.USA.NOAM LinBPQ6.0.25
R:260418/1844Z 6389@N3FUD.#EPA.PA.USA.NOAM LinBPQ6.0.25
R:260418/1844Z 65843@N3IP.#SEPA.PA.USA.NOAM BPQK6.0.24
R:260418/1843Z 928@KA3VSP.DE.USA.NOAM BPQ6.0.25
R:260418/0416Z 11393@N4SD.#TIDE.VA.USA.NOAM BPQ6.0.24
WOXX13 KWNP 180416
ALTK04
Space Weather Message Code: ALTK04
Serial Number: 2650
Issue Time: 2026 Apr 18 0414 UTC
ALERT: Geomagnetic K-index of 4
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov
------
73 de Sperry N4SD
N4SD@N4SD.#TIDE.VA.USA.NOAM
Received via NOAA GOES-East satellite downlink
Return To Bulletin List