Fig. 11From: Classification of drought severity in contiguous USA during the past 21 years using fractal geometryThe multi-fractal spectrum analysis of Drought Monitor Categories database (2000–present) shows the occurrence of multi-fractality with a broad range of exponents in data structure of \(D_4\) and presence of mono-fractal behavior with a narrow range of exponent for \(D_0 - D_3\)Back to article page