Solar Update July 2019

Guest Post by David Archibald The two major items of interest are the likely month of minimum in the Solar Cycle 24 – 25 transition and the likely amplitude of Solar Cycle 25. The latter can be derived from the solar polar magnetic field strength. Figure 1 following indicates that 25 is likely to be…

A record of the sun left on the moon

From NASA Goddard: Summary: The Sun’s rotation rate in its first billion years is unknown. Yet, this spin rate affected solar eruptions, influencing the evolution of life. A team of NASA scientists think they’ve figured it out by using the Moon as critical evidence. NASA’s Solar Dynamics Observatory captured this image of a solar flare…

Three solar storms headed for Earth

NOAA forecasters say there is a 55% to 60% chance of geomagnetic storms on May 15th and 16th when a series of coronal mass ejections (CMEs) could hit Earth’s magnetic field. Storm levels are expected to range between category G1 and G2. This means auroras could be sighted in northern-tier US states such as Montana,…

Evidence of the 11 year Solar Cycle in the Stratosphere

This is not a novel result, for example: https://wattsupwiththat.com/2018/03/30/tools-to-spot-the-spots/ Nevertheless, this is a solid analysis and exercise in citizen science.~ctm By: Leron Wells During my early teenage years as an avid fan of the Space Program I was patiently waiting for NASA to get the Shuttle flying so hopefully they could boost Skylab from its…

Unexpected rain on sun links two solar mysteries

NASA/Goddard Space Flight Center For five months in mid 2017, Emily Mason did the same thing every day. Arriving to her office at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, she sat at her desk, opened up her computer, and stared at images of the Sun — all day, every day. “I probably looked…

Huge new sunspot may hurl flares towards Earth

Sunspot AR2736, which hurled a Coronal Mass Ejection toward Earth yesterday, is growing larger and crackling with C-class solar flares. The active region now sprawls across more than 100,000 km of the solar disk and contains multiple dark cores as large as Earth, making it one of the biggest sunspots in recent years. Two days…