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[28] [42] Lockwood and Fröhlich, 2007, found "considerable evidence for solar influence on the Earth's pre-industrial climate and the Sun may well have been a factor in post-industrial climate change in the first half of the last century", but that "over the past 20 years, all the trends in the Sun that could have had an influence on the Earth ...
Illinois averages around 50 days of thunderstorm activity a year which put it somewhat above average for number of thunderstorm days for the United States. Illinois is vulnerable to tornadoes with an average of 54 occurring annually, which puts much of the state at around 9.7 tornadoes per 10,000 square miles (30,000 km 2) annually.
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]
Ulysses's observations of solar wind speed as a function of helio latitude during solar minimum. Slow wind (≈ 400 km/s) is confined to the equatorial regions, while fast wind (≈ 750 km/s) is seen over the poles. [1] Red/blue colors show outward/inward polarities of the heliospheric magnetic field. An illustration of the structure of the Sun
This relentless high-speed flow of charged particles from the sun fills interplanetary space. ... But precisely how the sun generates the solar wind has remained unclear. ... Climate change added ...
Many suburban, exurban and rural locations have all-time records that have surpassed 110 °F (43 °C), many of which were set during a heat wave in July 1936, when a massive heat wave engulfed the entire Chicago and northern Illinois region, resulting in eight consecutive days at or above 100 °F (38 °C) at Midway Airport, peaking at 107 °F ...
In 2023, Pritzker made remarks that contradicted remarks he made before the 2022 election, where he had ensured the Illinois Farm Bureau local governments would have control over the projects.
Recently, the wind speeds were re-examined and adjusted to a maximum official wind speed of 321 mph (516.6 km/h). [312] A DOW calculation of a subvortice of the 2013 El Reno tornado was estimated in a range of 257–336 mph (414–541 km/h) in 2024. [313]