Propagation
NOAA STI
:Product: Geophysical Alert Message wwv.txt:Issued: 2023 Jun 05 1805 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
#
# Geophysical Alert Message
#
Solar-terrestrial indices for 04 June follow.
Solar flux 168 and estimated planetary A-index 10.
The estimated planetary K-index at 1800 UTC on 05 June was 0.67.
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: ALTK04Serial Number: 2377
Issue Time: 2023 Jun 04 2102 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2023 Jun 04 2059 UTC
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
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
| 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 |
Propagation Links
| Title | Rating |
|---|---|
| Sunrise/Sunset tables by NOAA |   |
| Sunrise/Sunset by U.S. Naval Observatory | |
| 3-Day Forecast of Space Weather Conditions | |
| NOAA Geomagnetic Field Synthesis Program Computes the estimated values of Earth's magnetic field, including magnetic declination (D), based on the current International Geomagnetic Reference Field (IGRF). | |
| CT1BOH Propagation Page | |
| N6RT Propagation Information | |
| The Solar and Heliospheric Observatory | |
| Current Solar Images | |
| Ionosphere Data Archived at National Geophysical Data Center (NGDC) | |
| High Frequency Active Auroral Research Program HAARP is a scientific endeavor aimed at studying the properties and behavior of the ionosphere, with particular emphasis on being able to understand and use it to enhance communications. | |
| AD5Q Propagation Forecast Archive Eleven years of propagation reports from February 1988 to January 1999 focused on DX openings from North America. | |
| Solar Terrestrial Physics Data from Earth's upper atmosphere and space environment to the surface of the Sun, and Earth observations from space. | |
| The Aurora Page Information, links and images about the "Northern Lights". | |
