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Table 1 Agricultural drought severity by VHI

From: Analysis of the long-term agricultural drought onset, cessation, duration, frequency, severity and spatial extent using Vegetation Health Index (VHI) in Raya and its environs, Northern Ethiopia

Level of severity VHI values
Extreme drought < 10
Severe drought 10–20
Moderate drought 200
Mild drought 30–40
No drought > 40