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Sunburn effect (as measured by the UV index) is the product of the sunlight power spectrum (radiation intensity) and the erythemal action spectrum (skin sensitivity) across the range of UV wavelengths. [9] [10] The UV index is a number linearly related to the intensity of sunburn-producing UV radiation at a given point on the Earth's surface.
Part of the county's territory went to Del Norte County in 1857, and in 1874 the remainder was divided between Humboldt and Siskiyou counties. Pautah County, California was created in 1852 out of territory which, the state of California assumed, was to be ceded to it by the United States Congress from territory in what is now the state of Nevada.
The most California tornadoes on a single day in the state was seven, which occurred on November 9, 1982. [58] In July 2004, a twister touched down in Sequoia National Park at an altitude of around 12,156 ft (3,705 m), making it the highest elevation for a confirmed tornado in the United States. [60]
An enlargeable map of the 3,143 counties and county equivalents located in the 50 U.S. states and Washington, D.C. as of 2020. The 100 county equivalents in the U.S. territories are not on this map. There are 3,244 counties and county equivalents in the United States.
The following is a list of the 3,143 counties and county-equivalents in the 50 states and District of Columbia sorted by U.S. state, plus an additional 100 county-equivalents in the U.S. territories sorted by territory.
Date/Time Thumbnail Dimensions User Comment; current: 09:14, 1 January 2008: 621 × 733 (258 KB): Thadius856 {{Information |Description=County map of California, showing different geographical regions of the state.
California county map (labeled and colored).Map of California with labeled counties, colors added. Based on File:California county map (labeled).svg by User:Thadius856: Date: 8 September 2009, 23:19: Source: Own work Based on File:California county map (labeled).svg by User:Thadius856: Author: optigan13: Permission (Reusing this file)
Map of California with "Upstate California" shown in dark red. Northern California includes both the red and the light red counties. Upstate California is the name of a marketing campaign which seeks to promote business in the northernmost 20 counties of California . [ 1 ]