SFI = 153
A index = 7
K index = 1
SSN = 113
GEOMAGNETIC STORM WATCH: Minor G1-class geomagnetic storms are possible on July 13th when a high-speed stream of solar wind is expected to hit Earth’s magnetic field. The stream is a mix of plasma flowing from two small holes in the sun’s atmosphere. Any auroras will have to compete with the bright light of a full Moon.
HUGE SOLAR FILAMENTS: The sun today is peppered with large sunspots. One look at the solar disk, however, reveals something even bigger. “There are several huge filaments of magnetism,” reports Francois Rouviere, who sends this picture from Cannes, France.
These structures are irregular tubes of magnetism holding masses of plasma above the surface of the sun. They look dark because they are cooler than the underlying star. Relatively cooler. If you could pull one off the sun and hold it up in the night sky, it would glow more brightly than a full Moon.
It is no exaggeration to say they are huge. “It’s crazy,” says astrophotographer Martin Wise of Trenton, Florida. “This one is more than one light-second long.”
Wise inserted a picture of Earth to show how the filament dwarfs our planet. From end to end it stretches about the distance from Earth to the Moon.
Solar magnetic filaments are famously unstable. However, these have held themselves together for days. If one eventually erupts, it could hurl debris toward Earth.
NOAA STI
:Product: Geophysical Alert Message wwv.txt
:Issued: 2022 Jul 12 0605 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
#
# Geophysical Alert Message
#
Solar-terrestrial indices for 11 July follow.
Solar flux 161 and estimated planetary A-index 12.
The estimated planetary K-index at 0600 UTC on 12 July was 3.
Space weather for the past 24 hours has been minor.
Radio blackouts reaching the R1 level occurred.
Space weather for the next 24 hours is predicted to be minor.
Geomagnetic storms reaching the G1 level are likely.
NOAA Alerts
Space Weather Message Code: WARK04
Serial Number: 4133
Issue Time: 2022 Jul 12 0435 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2022 Jul 12 0435 UTC
Valid To: 2022 Jul 12 0900 UTC
Warning Condition: Onset
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.