On October 3 2024, NOAA AR 3842 produced an X9.0 flare, peaking at 12:18 UTC. Remarkable as it is (it's the strongest X class flare of the current cycle to date), it is also noticeable as one of first major event observed with 5 different solar radio instruments in Humain.
Callisto
The venerable Callisto instrument observed the event as part of the e-Callisto network.
ARCAS and HSRS
The two digital instruments ARCAS and HSRS observed the whole event from 1500 down to 50 MHz, showing type III burst, a type II starting at around 500 MHz, and a subsequent type IV burst, in L band and then in UHF, lasting until the end of the tracking period for the 6-m telescope hosting the two instruments.
SPADE
The SPADE array recently turned on observed between ~67. and ~33 MHz the development of the low frequency part of the radio event, type IIIs, type II and a long last type IV burst until sunset. The high sensitivity and time and frequency resolution (~50 ms, ~ 4 kHz) allow for the detection of numerous signatures of non thermal electrons energised in the aftermath of the flare and trapped in the post flare loops.
SAFIRE
At the other hand of the spectrum, the SAFIRE instrument installed on a 3.6 m dish, still under testing, observed the event at 1415 MHz, with 0.1 s resolution in intensity only for this event, but circular polarisation is possible.
