What caused this red-only rainbow?

Red, GameToons Wiki

How are rainbows formed? - Met Office

Rainbow, Definition, Formation, & Facts

Rain the Rainbow - インディーズ

red rainbow

A rainbow is shown Sept. 10, 2022, forming over Fort McCoy, Wis. The rainbow appeared just as the sun was setting and as a passing rain shower was taking place. According to

Over the Rainbow: The Science, Magic and Meaning of Rainbows – Nobrow Press

Essential Science: Why some rainbows are completely red - Digital Journal

What Is the Rainbow Color Order? Understanding ROYGBIV

Last Word Archive

Flaming Rainbow, This is what the sky looked like from my b…

Rain the Rainbow - インディーズ