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Solar cycle 25 is the current solar cycle, the 25th since 1755, when extensive recording of solar sunspot activity began. It began in December 2019 with a minimum smoothed sunspot number of 1.8. [2] It is expected to continue until about 2030. [3] [4]
Reconstruction of solar activity over 11,400 years. Sunspot numbers over the past 11,400 years have been reconstructed using carbon-14 and beryllium-10 isotope ratios. [10] The level of solar activity beginning in the 1940s is exceptional – the last period of similar magnitude occurred around 9,000 years ago (during the warm Boreal period).
Solar cycles are nearly periodic 11-year changes in the Sun's activity that are based on the number of sunspots present on the Sun's surface. The first solar cycle conventionally is said to have started in 1755. The source data are the revised International Sunspot Numbers (ISN v2.0), as available at SILSO. [1]
Sunspot formation is cyclical, and the current solar cycle has reached the highest number of sunspots since 2001, NOAA announced Friday. With the current period of high activity, scientists ...
The current space weather forecast could include impacts outside the Northern Lights, including weak power grid fluctuations. ... a period of peak sunspot activity in its 11-year cycle. However ...
This busy series of northern lights activity will soon come to a peak as the sun ... in which more sunspots with intense magnetic activity are ... with the current cycle expected to peak between ...
High sunspot activity is celebrated by members of the amateur radio community as a harbinger of excellent ionospheric propagation conditions that greatly increase radio range in the HF bands. During peaks in sunspot activity, worldwide radio communication can be achieved on frequencies as high as the 6-meter VHF band. [36]
Solar Cycle 25 has been ongoing, and scientists with NOAA and Nasa have been tracking sunspots to determine and predict solar activity. The past two years marked the active phase of the solar ...