Quite possibly three Alliance Airlines Fokker F-100 charters popped into Emerald Airport on Thursday 8 March.
It looks like the recently launched FIFO charter from Emerald to Brisbane via Hervey Bay operated Thursday, and will operate every second Thursday. The inbound Brisbane to Emerald via Hervey Bay operates every second Monday - the next flight should be this Monday 12 March. It looks like F-100 VH-XWR operated the UTY4583 flight to Brisbane on Thursday.
Also noted was F-100 VH-FKF, which positioned to Emerald before flying to Brisbane as UTY2241. VH-FKF is pictured later in the day at Rockhampton.
I also believe that F-100 VH-FKG operated UTY7656/7657 on another Brisbane to Emerald to Brisbane FIFO charter as well. That made three Alliance FIFO departures on Thursday.
There was also a Brindabella Airlines Metro charter to Emerald Airport on Thursday too, although I don't have a rego.
Lastly, Regional Express (REX) SAAB 340, VH-ZXS, also operated a FIFO flight from Emerald to Brisbane in the morning after arriving the night before. It is pictured at Emerald Airport earlier in the week.