Whitepaper #364 in the Decadal Survey for Solar and Space Physics (Heliophysics) 2024-2033. Main topics: basic research. Additional topics: solar physics; space-based missions/projects; user-need-driven basic space weather research.
It is essential that there be coordinated and co-optimized observations in X-rays, gamma-rays, and EUV during the peak of solar cycle 26 (~2036) to significantly advance our understanding of impulsive energy release in the corona. These observations can be achieved through a single flagship mission or through a combination of major missions (e.g., the previously proposed FIERCE mission concept).