Giuseppe Consolini — Istituto Nazionale di Astrofisica #
Crackling Noise and Magnetospheric Substorm Dynamics #
G. Consolini (1) and P. De Michelis (2)   1)	INAF-Istituto di Astrofisica e Planetologia Spaziali, Roma, Italy 2)	Istituto Nazionale di Geofisica e Vulcanologia, Roma, Italy  The dynamics of Earth's magnetosphere in response to changes in the solar wind and interplanetary conditions are very complex, often showing scale-invariant energy relaxation events during the occurrence of magnetospheric substorms. In this presentation, we examine auroral electrojet AL-index bursts during substorms and show how the enhancement of ionospheric electrojet currents shares similarities with crackling noise observed in front propagation models. Our findings make a significant contribution to understanding the small-scale dynamics of the magnetospheric plasma sheet and the mechanisms driving magnetospheric substorms.