## 5 Discussion  
### Main Active Structures of the Central Betic Cordillera  
The deformations and stresses in the study area are heterogeneous, although an extension striking NE-SW predominates, as indicated by structural, seismological, and geodetic data. In the eastern Granada Basin (Figure 2), the main structures are well-known NW-SE normal faults, such as the Granada Fault, the Padul Fault, and the Sierra Elvira faults [47, 104, 135]. NE-SW active faults, such as the Huenes Fault and the NE-SW faults of the Sierra Elvira, are also common [46]. These faults are mostly active strike-slip faults that are sinistral if they dip to NW and dextral if they dip to the SE [27]. These main structures accommodate the NE-SW extension of the sector, in agreement with the latest paleostresses (Figures 2 and 3) and current stresses (Figure 4). These data are consistent with W and SW motion obtained from the GNSS sites LOJA, 6100, PAD, and PALM (Figure 5). The NE-SW faults also present an important normal behaviour that could accommodate the NW-SE extension, and their activity is also in agreement with local radial extension in the area [42, 43, 119], as it happens in the present-day stresses of the 1988 Agron seismic series (Figure 4). In fact, the activity of the ENE-WSW normal faults, such as the Tocon-Obeilar and Obeilar-Pinos Puente Faults [27, 135], can explain the local southward displacement of site 6200, located in the hanging wall block of these faults. GNSS data of the northern border of the Granada Basin indicate that this sector is currently moving to the W-SW with respect to stable Eurasia plate (Figure 1) [133], the most affected sector by strike-slip faulting (Figure 4). Similar observations have been made in the northern part of Sierra Gorda, where the 1998 Iznajar series indicated the activity of dextral strike-slip faults [108, 109]. At the same time, the S-SE displacements with respect to stable NEVA, shown by the 6200 and 6300 sites (Figure 5), together with stress ellipsoid from striated pebbles [149], point locally to a recent NW-SE compression. Additionally, the ENE-WSW normal faults limiting the Granada Basin to the north were active until recent times [37] but may be locally inactive at present. This area could be suffering the permutation of horizontal NW-SE shortening related to Eurasia-Nubia convergence and the activity of normal dextral faults. The successive change of extension and compression in the same trend is common in the region, as evidenced by the analysis of stresses in the 1988 Agron series [35]. The W and SW boundaries of the Granada Basin seem to be under compression and shortening, as evidenced by both recent faulting and GNSS data (Figures 2, 3 and 5). To the west, the N-S thrusts of the Sierra Gorda were active at least until the Tortonian, and the latest paleostress data suggest E-W compression perpendicular to main thrusts (Figures 2 and 3) [17]. At present, the shortening between the 6100 GNSS site with respect to the LOJA and 6000 sites suggests that contraction continues (Figure 5). To the southwest, deformation between the 6100 and MALA sites likewise indicate shortening in NE-SW direction (Figure 5), which could be related to an active development of the Sierra Tejeda uniform, further indicated by very incised drainage systems [37]. The reverse paleostresses align with the fold axis and suggest recent E-W and NE-SW compression. Both active and recent normal faulting is very common in the area (Figures 2-4) [145]. The Zafarraya Fault is the main active fault, presenting an E-W orientation associated with local N-S extension [134]. Despite this, it has been linked to compressional structures [35, 37]. Active shortening may suggest that normal faulting is related to local structures resulting from the collapse of previously uplifted areas. In the south of Sierra Nevada area, the latest paleostress analyses indicate simultaneous NNW-SSE and ENE-WSW extensions, with both normal and strike-slip faulting (Figures 2 and 3).