Sun activity archive for January 2025
Sun news for January 31 – February 1 (11 UTC to 11 UTC)| EarthSky
Sun news for January 31 – February 1 (11 UTC to 11 UTC)| EarthSky
The magnetosphere is the region of space surrounding Earth where the dominant magnetic field is the magnetic field of Earth, rather than the magnetic field of interplanetary space. The magnetosphere is formed by the interaction of the solar wind with Earth’s magnetic field. This figure illustrates the shape and size of Earth’s magnetic field that is continually changing as it is buffeted by the solar wind. | www.swpc.noaa.gov
Why is the sun's atmosphere so much hotter than its surface?| spaceplace.nasa.gov
Raúl Cortés studied engineering at the Autonomous University of Nuevo León in Monterrey, Mexico, obtained a scholarship to continue his studies in Japan and after returning to Monterrey he got credits on MBA from the Graduate School of Mechanical and Electrical Engineering Faculty. He became a teacher at the University UANL teaching Math and Physics and dedicated the rest of his professional career to serve in engineering areas for USA, Japan and Germany based corporations. His passion for...| earthsky.org
Armando is known primarily as an astronomy educator, after 30+ years of extensive public outreach and 10 years teaching in colleges. As one of only a handful of science communicators in Puerto Rico during Comet Halley's last visit, he assumed a pioneering role starting in 1985 when science was just beginning to enter the collective mindset. Over the years, his work as a teacher, speaker and writer, inspired people to pursue interests in science and brought enduring change to Puerto Rican cult...| earthsky.org
What are the different types, or classes, of flares?| solar-center.stanford.edu
Artist’s concept of activity on the sun traveling across space, to interact with Earth’s magnetic field. Not to scale. The sun’s activity can cause a geomagnetic storm, which aren’t harmful to humans, but which can harm earthly technologies. Image via Wikimedia Commons.What happens during a geomagnetic storm?| EarthSky
Coronal mass ejection on February 27, 2000. A disk blocks out the light of the sun. The white circle indicates the sun’s surface. Learn more about coronal mass ejections here. Image via SOHO.What are coronal mass ejections?| EarthSky
View full size. | World map of time zones. UTC (0) is the green vertical stripe just to the left of center. Image via TimeZonesBoy/ CIA/ Wikimedia.Time zones| EarthSky
The purpose of the day is to achieve full and equal access to and participation in science for women and girls.| United Nations
On New Year’s Eve 2023, the sun blasted a huge X flare, the biggest of solar cycle 25 so far. It came from sunspot region AR3536 and measured X5 on the solar flare intensity scale. The eruption produced a wave that rippled across the sun’s face in all directions. It produced a coronal mass ejection, or CME, a great clump of superheated matter that left the sun and traveled outward into our solar system. | EarthSky
Coronal holes appear as dark areas in the solar corona in extreme ultraviolet (EUV) and soft x-ray solar images. They appear dark because they are cooler, less dense regions than the surrounding plasma and are regions of open, unipolar magnetic fields. This open, magnetic field line structure allows the solar wind to escape more readily into space, resulting in streams of relatively fast solar wind and is often referred to as a high speed stream in the context of analysis of structures in int...| www.swpc.noaa.gov
The solar wind continuously flows outward from the Sun and consists mainly of protons and electrons in a state known as a plasma. Solar magnetic field is embedded in the plasma and flows outward with the solar wind. | www.swpc.noaa.gov
Solar radiation storms occur when a large-scale magnetic eruption, often causing a coronal mass ejection and associated solar flare, accelerates charged particles in the solar atmosphere to very high velocities. The most important particles are protons which can get accelerated to large fractions of the speed of light. At these velocities, the protons can traverse the 150 million km from sun to Earth in just 10’s of minutes or less. When they reach Earth, the fast moving protons penetrate t...| www.swpc.noaa.gov
Solar flares are large eruptions of electromagnetic radiation from the Sun lasting from minutes to hours. The sudden outburst of electromagnetic energy travels at the speed of light, therefore any effect upon the sunlit side of Earth’s exposed outer atmosphere occurs at the same time the event is observed. The increased level of X-ray and extreme ultraviolet (EUV) radiation results in ionization in the lower layers of the ionosphere on the sunlit side of Earth. Under normal conditions, high...| www.swpc.noaa.gov
The NOAA Space Weather Scales were introduced as a way to communicate to the general public the current and future space weather conditions and their possible effects on people and systems. Many of the SWPC products describe the space environment, but few have described the effects that can be experienced as the result of environmental disturbances. These scales are useful to users of our products and those who are interested in space weather effects. The scales describe the environmental dis...| www.swpc.noaa.gov
