Transport in the Scrape-Off Layer (SOL), especially during transient events, such as Edge Localized Modes (ELMs), is not fully understood. Normally longitudinal transport along the magnetic field lines dominates over perpendicular transport across the field lines, leading to large ELM-driven heat and particle fluxes at the divertor plates. The parallel motion along the field lines is limited to the convective speed of the particles. As a consequence of this, each ELM gives rise to two distinct responses at the targets, first an electron heat pulse a few microseconds after the start of the ELM and then of the order of 100 ms later by an ion heat pulse. The ELMs are generally localized at the outer midplane of the torus-shaped plasma. Therefore, the propagation time to the inner target is longer than that to the outer target, typically 300ms versus 100ms for the ion heat pulse at JET.