Cycloidal marks

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Circular cycloidal marks observed following an F4 tornado near Scottsbluff, Nebraska in 1955

Cycloidal marks, also known as cycloidal damage swaths, are lineo-circular piles of debris that are produced by some powerful multiple-vortex tornadoes.[1][2] Cycloidal marks are typically an indication that a tornado possessed suction vortices. Notable tornadoes that have produced cycloidal marks include the 2008 Parkersburg–New Hartford tornado,[3] 2016 Dodge City tornadoes and the 2022 Nullarbor Plain tornado.[4][5] Cycloidal marks created by dust devils have been documented on Mars by the Mars Global Surveyor.[6][7]

See also

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References

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