Schematic formation diagram proposed for filament G37. The main structure of filament G37 underwent three evolutionary phases, namely: a) a filament lacking an H II region, b) a filament compressed by an expanding H II region, and c) the formation of filament G37. The structure of the filament is depicted by the blue lines, while the B field is represented by the dashed red lines. The position of the H II region is illustrated by the green graphics. Additionally, the yellow stars and red crosses indicate the locations where star formation was triggered.