Photo By/Credit
Amber McCullum/Bay Area Environmental Research Institute, NASA Ames Research Center
Date Shot/Created
07/13/2022Media Usage Rights/License
Public Domain
Image
Area-averaged polygons indicating the 6-month Standardized Precipitation Index (SPI) leading into the summer monsoon season of 2018 (end date of June 1, 2018), where much for the Navajo Nation experienced extreme or exceptional drought. A SPI index value is calculated as the area-average for each of the Navajo Nation's 110 Chapters.