Propagation

NOAA STI

:Product: Geophysical Alert Message wwv.txt
:Issued: 2023 Apr 02 1505 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
#
# Geophysical Alert Message
#
Solar-terrestrial indices for 01 April follow.
Solar flux 125 and estimated planetary A-index 13.
The estimated planetary K-index at 1500 UTC on 02 April was 2.33.

No space weather storms were observed for the past 24 hours.

No space weather storms are predicted for the next 24 hours.

NOAA Alerts

Space Weather Message Code: WARK04
Serial Number: 4335
Issue Time: 2023 Apr 02 1155 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4334
Valid From: 2023 Apr 01 1035 UTC
Now Valid Until: 2023 Apr 02 2359 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
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.

NOAA Observations

 

NOAA Scales Activity

NOAA Scales Activity
Range 1 (minor) to 5 (extreme)
NOAA Scale Past 24 hrs Current Fcst 24 hrs
Geomagnetic Storms
None
None
None
Solar Radiation Storms
None
None
None
Radio Blackouts
None
None
None

DX Cluster WWV announcements

HourByComment
0900AE5ESFI=143, A=4, K=1, Minor w/R1 -> Minor w/R1
0900VE1DXSFI=80, A=6, K=0, No Storms -> No Storms
0900AE5ESFI=84, A=5, K=0, No Storms -> No Storms
0900VE7CCSFI=87, A=5, K=3, No Storms -> Minor w/G1
0900VE1DXSFI=91, A=4, K=0, No Storms -> No Storms

Propagation Links

TitleRating
Basics of Radio Wave Propagation
 
Solar Influences Data Analysis Center
High Latitude Geomagnetic data
A dynamic collection of high latitude geomagnetic data from 12 Canadian observatories.
The Aurora Alarm
Free service that sends an email when an aurora is imminent.
AE4RV's Propagation Primer
A Flash movie that describes how HF (shortwave) radio propagation works for beginners.
Radio Line of Sight Plot Server
DXrobot
Automatic real-time AURORA and E-skip warnings via email or mobile phone.
hfradio.org Propagation Page
HF and SWL propagation data and forecasts.
Grey Line Map
An automatically refreshing, real-time world map showing daylight, twilight (greyline or grayline) and darkness.
Real-Time 24 Hour Effective Sunspot Number
 
MSU Solar Physics Group
Of interest to solar keen hams is the YPOP section. Near real time movies of active solar regions in JAVA,GIF or MPEG.
HF Propagation Predictions from the United Kingdom
Table of path openings by band for major cities around the world. The table has been optimised for U.K. radio amateurs.
Current Hydrogen-Alpha Solar Image
Updated every minute!
Space Weather Bureau
Daily monitoring of solar flares, geomagnetic storms, Earth's aurora, and all forms of space weather. sunspots, the sun, solar flares, sun quake, sunquakes
IPS Radio and Space Services
Australian space weather agency.
Propagation Studies Committee of the Radio Society of Great Britain
 
SM6EHY on Propagation (below 10 MHz)
 
Super Dual Auroral Radar Network
SuperDARN is a network of high-frequency radars used to study the Earth's ionosphere.
Solar Terrestrial Dispatch Ham Page
Sunrise, Sunset &Twilight by local Time Zone