July 11, 2019
Arizona has hundreds of quakes and tremors each year, many of them near the Grand Canyon, but most are imperceptible to humans. (Photo by Chloe Jones/ Cronkite News)
July 11, 2019
Arizona has hundreds of quakes and tremors each year, many of them near the Grand Canyon, but most are imperceptible to humans. (Photo by Chloe Jones/ Cronkite News)