- Equinox — Mon, Mar 20, 2023 21:24 UTC • 5:24 PM EDT
Solar Cycle
June 20, 2021
The June Solstice for 2021 occurs on June 21st at 3:22 UTC (11:32 pm EDT on June 20th). It is the beginning of summer for the northern hemisphere and winter for the southern hemisphere.
October 5, 2018
We have been getting a number of questions and comments lately regarding the possible relationship between solar activity and geological activity, such as earthquakes and volcanoes, so I have decided to look into the matter in more detail. First let […]
March 7, 2012
Sunspot group, AR11429 (Active Region), is at it again. When it first began its journey across the Earthward side of the Sun it released an M-class flare, an X-class flare and several more M flares, along with several CMEs. Early […]
November 3, 2011
Sunspot group AR11339 (AR stands for Active Region) has just rotated onto the Earth facing disk of the Sun. Before coming completely into view the region had produced two M flares in 24 hours (an M4.3 flare […]
October 26, 2011
Saturday, October 22, 2011, started like most any other day, lots of activity of varying size and shape was occurring on the Sun. Most people looking at the Sun that day remember the spectacular lightbulb shaped CME that occurred […]
October 26, 2011
A spectacular filament eruption from June 7, 2011 captured by the STEREO Ahead spacecraft with EUVI 304, Cor1 and Cor2. Happy Birthday STEREO!! October 26 ,2011 is the 5th anniversary of the launch of the STEREO mission and […]
July 4, 2011
A few weeks ago 3 groups of solar scientists released a joint press release at the 2011 meeting of Solar Physics Division (SPD) of the American Astronomical Society. Each group presented a unique set of solar observations, […]