# Potential and Limitations of the New European Ground Motion Service in Landslides at a Local Scale
## 3 Results  
### Sentinel-1 A-DInSAR Measurements  
Sentinel-1 A-DInSAR datasets showed varying degrees of ground displacement in the La Miera landslide (Figure 2). When comparing ground movement rates, active PS values were considered to be those above \(\pm\)4.0 mm/year. This threshold was selected according to the standard deviation of LOS velocities. Firstly, with the ascending track, 27 MP were detected. They showed only stable MP, with LOS velocity (VLOS) rates ranging from \(-\)2.0 to 3.6 mm/year (Figure 2A). Stable MP were detected in the landslide area, in the town of Pola de Lena, and in El Valle village (Figure 2A). In the case of the descending track, a total of 148 MP were detected, with VLOS rates ranging from \(-\)9.7 to 1.2 mm/year (Figure 2B). The maximum VLOS velocity of \(-\)9.7 mm/year was detected in the La Miera neighborhood. All unstable MP (\(\leq\)4.0 mm/year) were measured in buildings in Los Campos, La Miera, and El Valle village (Figure 2B). In El Valle village, a maximum VLOS of \(-\)11.6 mm/year was detected (Figure 2B). Pola de Lena town and the eastern boundary of the landslide were identified as stable areas (Figure 2B). As to horizontal and vertical datasets, 23 MP were measured, whose horizontal velocities ranged from \(-\)7.9 to \(-\)0.2 mm/year, while vertical velocity ranged from \(-\)5.3 to \(-\)1.0 mm/year(Figure 2C,D). A maximum horizontal displacement of \(-7.9\) mm/year was measured in the Los Campos neighborhood and in El Valle village (Figure 2C). Some areas in Los Campos, La Miera, and El Valle were identified as unstable, with horizontal velocities higher than \(-4.0\) mm/year (Figure 2C). These negative rates suggest a predominance of westward ground motion downslope of the landslide (Figure 2C). Although a maximum vertical velocity of \(-5.3\) mm/year was detected in a building located in the north of the Los Campos neighborhood (Figure 2D), the rest of the vertical MP presented stable velocities (\(-4.0\)-\(4.0\) mm/year) (Figure 2D).  
Regarding the Deformation Time Series (TS) (Figure 3), these were only observed from descending (TS-Desc) and horizontal (TS-Hor) tracks (Figure 2B,C). Only TS-Desc and TS-Hor have been selected because the ascending and vertical data present a stable pattern with high noise, and they were not relevant to the analysis. In general, both TS present linear patterns of rising deformation from January 2015-2016 to December 2021 (Figure 3). In the case of TS-Desc (Figure 3A), the maximum accumulated displacement was \(-44.7\) mm while the maximum accumulated displacement in the TS-Hor was \(-41.9\) mm (Figure 3B). In the TS-Desc, a period of acceleration of displacement can be observed between January and August 2021 followed by a recuperation of deformation until December 2021 (Figure 3A). In the TS-Hor can be observed a higher fluctuation of displacement, with rising deformation periods followed by episodes of recuperation and stabilization of displacement (Figure 3B).  
Figure 2: Sentinel-1 A-DInSAR detected in the La Miera landslide. (**A**) Ascending LOS velocity at Sentinel-1 full resolution. (**B**) Descending LOS velocity measured at Sentinel-1 full resolution. (**C**) Horizontal velocity estimated at 100 m pixel size. (**D**) Vertical velocity is estimated with a pixel resolution of 100 m. Red circles show location of deformation time series (Figure 3).