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May 2024 solar storms: X1.2(X1.3)-class flares [93] and X4.5-class flare. [94] The flares with a magnitude of 6–7 occurred between 30 April and 4 May 2024. On 5 May the strength of the solar storm reached 5 points, which is considered strong according to the K-index. The rapidly growing sunspot AR3663 became the most active spot of the 25th ...
1917 – Aug 176 73 4-1 10-1 Solar cycle 16: 1923 – Aug 9.3 1928 – Apr 130 68 4-8 10-1 Solar cycle 17: 1933 – Sep 5.8 1937 – Apr 199 96 3-7 10-5 Solar cycle 18: 1944 – Feb 12.9 1947 – May 219 109 3-3 10-2 Solar cycle 19: 1954 – Apr 5.1 1958 – Mar 285 129 3-11 10-6 Solar cycle 20: 1964 – Oct 14.3 1968 – Nov 157 86 4-1 11-5 ...
Solar cycle 22 was the 22nd solar cycle since 1755, when extensive recording of solar sunspot activity began. [1] [2] The solar cycle lasted 9.9 years, beginning in September 1986 and ending in August 1996. The maximum smoothed sunspot number observed during the solar cycle was 212.5 (November 1989), and the starting minimum was 13.5. [3]
The aurora is expected to be bright and visible in multiple northern U.S. states Oct. 3 through Oct. 5 as well as from the lower Midwest to Oregon.
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This week, a solar storm caused large explosions of solar plasma and magnetic energy from the surface of the sun into space — an event known as a coronal mass ejection.
16 August 16, 1947 (Saturday) 17 August 17, 1947 (Sunday) 18 August 18, 1947 (Monday) ... The following events occurred in August 1947: August 1, 1947 (Friday)
The sun spit out the huge flare on Thursday, resulting in two hours of radio interference in parts of the U.S. and other sunlit parts of the world. Scientists said it was the biggest flare since 2017.