1910: Frank Aley, a mineralogist, humorist and writer, known by the pen name of "Mescal," dies at Calumet Hospital in Douglas. He had apparently been fatally injured in a fall from a horse.

1920: Several people are injured and a number of buildings are damaged or destroyed when the powder magazine at the United Verde Mine at Jerome exploded.

1926: A tornado rips through a 20-foot strip of east Phoenix, leveling six homes.

1943: Sharlot Hall, a Prescott historian known as Arizona's poet-laureate, dies.

Want to share an important event from Tucson's history? Email it to krumore@azstarnet.com.