## 3 Results
### Comparison of SAR, Photogrammetric and Seismic Observations  
The camera kymographs support the results of the SAR data since they help to establish the phase changes and the appearance of new craters that coincide with the dates observed in the SAR data more accurately. In some examples (Figure 5d-h), we can explore how craters identified in the SAR data are also visible in the photographs and are established when they first emerged. This is the case at the beginning of the second phase with the emergence of craters in the SE flank (Figure 5d). Here, we see two craters, which we can identify in the photographs as well (Figure 5f,g). Similar to on 31 October (Figure 5e), we note the emergence of a new crater that connects the NW-SE linear crater row to the disaggregated ones in the SE. The emergence of this crater was visible on the photographs (Figure 5h). Finally, at the beginning of Phase 3, the development of the craters in the NE flank (Figure 5i) can be identified in the photographs (Figure 5j), as can be seen for the craters on 5 December 2021 (Figure 5k) and the corresponding photographs (Figure 5l).  
By comparing the peaks of intensity extracted from kymographs of Camera 1 and Camera 2 with the number of seismic events, we noted that around 24 October 2021 (day 36 of the eruption), an increase in seismicity occurred. This is located at a shallow depth of 9 to 12 km, immediately followed by a shift of lava fountain activity toward the SE (Figure 6a,b). A similar seismic increase followed by a shift in eruptions from one to the other craters occurred again on 17 November (day 60 of the eruption). This date concurs with a rapid increase in the number of earthquakes from 34 on 16 November to 158 on 17 November. We note that this is one of the very few episodes where seismic events were shallow between 9 and 12 km depth only. In addition, in the lava fountain activity recorded by Camera 2, we see an immediate shift of activity toward a SE vent. This phenomenon occurred again on 30 November (day 73 of the eruption) and 1 December 2021 (day 74 of the eruption), with a rapid increase in the number of earthquakes from 67 on 29 November to 184 and 143 on 30 November and 1 December, respectively. On these dates, the seismic events were of medium (9 to 12 km) and very shallow (<9 km) depth. We noted a strong directivity, as the following eruption activity uniformly and rapidly shifted toward the SE events, before gradually moving back again. However, this time, it took longer (three to four days) until the changes were visible as activity in lava fountains. In addition, it was evident that from 10 to 27 November 2021 (day 53 to 70 of the eruption), when the activity of the lava fountains looked stable in both cameras, the number of seismic events of greater depth (>20 km) was higher than the ones of medium depths (9-12 km).  
Figure 6.— Data time series comparing kymograph results of inferred lava fountain activity (top) and seismic data (bottom) as a function of time (shown as month-day) and as the day of the eruption (D). (**a**) Lava fountain activity extracted from the peaks on the intensity of the kymographs of Camera 1 (Cam 1) and Camera 2 (Cam 2). The red and orange line shows the track of the intensity peaks extracted from the kymographs, dashed black line is interpolated and shows periods of no visibility. (**b**) Seismic data plotted by the number of daily seismic events and classified by depth. The shallow depths are highlighted by orange color. The gray background indicates periods where we can infer a relationship between the seismic events and the lava fountain activity.