On 19 September 2021 at 15:12 (WET) the eruption of Cumbre Vieja volcano started in La Palma (Canary islands, Spain). With a 85 days duration, the Tajogaite - Cumbre Vieja eruption is the longest historical eruption and produced over 0.2 km3 of magma, covering over 12 km2 of land with a lava flow perimeter of 68 km (Fig. 1). 
Figure 1: (left) First phases of the 2021 Tajogaite eruption; (right) explosive and effusive activity from the Tajogaite cone. Photos by D. Andronico.
During the entire period, around 6000 earthquakes occurred at a depth spanning between 0 and 35 km b.s.l with a magnitude between 1 and 3.8 mbLg. Moreover, around 1.8 Tg of sulphur dioxide (SO2) were emitted and the ash plume reached a maximum height of 3 km.
This eruption caused the most severe damage in the recorded volcanic history of the island, leading to: the evacuation of about 7000 people, the destruction of 73 km transportation infrastructure, and the disappearance of 370 ha of farmland. The cost of this disaster exceeds 1.2 billion euro. This event serves as an excellent case study due to the abundant satellite and ground-based data available, allowing for the tracking of ash and SO₂ cloud evolution, as well as the progression of lava flow fields.
The GET-IT approach. The DTE modules that will be used in this use case demonstration are: DAMSAT, TOP_MON, CL_HOTSAT, GPUFLOW, VOLCLOUDS, and FALL3D. In addition, available datasets from ground networks, e.g. GNSS data, will be employed.
Expected Outcomes
Lava flow inundation map produced using the GPUFLOW module by assuming a constant effusion rate of 20 cubic meters for the first three days of eruption.
Figure 3 shows an example of a FALL3D output product (tephra column mass) for the 2021 eruption of the Cumbre Vieja volcano on the Spanish island of La Palma. The tephra column mass represents the vertical integration of tephra concentration and provides information about airspace areas prone to be contaminated by hazardous concentrations of volcanic ash at cruise Flight Level.
Figure 3: Volcanic ash forecast on 27 September 2021 for the eruption of the Cumbre Vieja volcano on the Spanish island of La Palma generated by an operational forecast system based on FALL3D installed in the Barcelona Supercomputing Center to provide daily forecasts for three months (September-November 2021).