Shaji et al. present a comprehensive wideband study of the hyperactive fast radio burst FRB 20240619D. While the majority of FRBs are “one-off” events, a small fraction of FRB sources do emit repeated bursts. Repeating FRBs are powerful tools for probing their emission mechanisms, as repeat bursts allow precise localization and detailed studies of their host environments. FRB 20240619D was first discovered with the MeerKAT radio telescope in June 2024. Subsequent detections with several telescopes confirmed the source’s hyperactivity. Using data from the MeerKAT, Murriyang, and Lovell telescopes, the team analysed the spectral, temporal, and polarimetric properties of 1539 bursts. The observations reveal a remarkably high burst rate of 161 bursts per hour in early August 2024 above a fluence value of 1.6 Jy ms as well as significant secular variations in rotation measure and diverse polarization characteristics. The burst activity showed frequency dependence with approximately 61% of the total number of bursts detected between 1300 and 1800 MHz. The burst activity of FRB 20240619D ceased abruptly after a period of intense activity lasting approximately 80 days, indicating an episodic behaviour. Follow-up observations with MeerKAT and the ATCA did not reveal an associated compact persistent radio source. The figure above shows the polarisation position angle (PPA), pulse profile, and dynamic spectra of nine individual bursts from FRB 20240619D observed with Murriyang. The top panel displays the PPA of the linear polarization as a function of time, and the middle panel shows the Stokes parameters: total intensity (I , black), linear polarization fraction (L/I , red), and circular polarization fraction (V /I, blue), normalized to the peak intensity. The bottom panel presents the (dedispersed) dynamic spectrum, and horizontal lines with uniform colouring indicate channels flagged due to RFI. Altogether, the results highlight the importance of continued long-term monitoring and multiwavelength observations in understanding the emission mechanisms and diversity of progenitor populations of fast radio bursts.