The 2011 Cordón Caulle eruption within the Puyehue-Cordón Caulle (PCC) volcanic complex in southern Chile resulted in a multitude of processes inducing wide scale volcano crater formation and deformation. The following chapters of this thesis explore the mechanisms responsible for the formation of meter-scale collapse pits and deformation of the kilometer scale Puyehue summit crater that occurred following the eruption. Chapter 2 focuses specifically on my analysis of surface deformation and pit crater formation in relation to syn-eruptive laccolith emplacement at Cordón Caulle. Pit craters (small circular shaped depressions) are ubiquitous geological features that have been observed throughout our solar system on planets, asteroids and moons. Despite being common features, the mechanisms governing their formation and evolution are still not fully understood. With the maturation of remote sensing technologies in the last few decades, we can now study these processes occurring in real time with high spatial and temporal resolution satellite imagery here on earth. Utilizing a robust collection of optical satellite imagery from 2011 to present, as well as ultra-high spatial resolution drone data acquired from a field campaign in 2022, we employ remote sensing analysis techniques to study how pit craters form and evolve in real time after the 2011 Cordón Caulle eruption. With remote sensing imagery, we precisely mapped and measured 349 pit craters, 26 pit crater chains (linear assemblages of pits) as well as 60 faults and fractures that formed following the eruption. Comparisons of PCC pit craters' depth to diameter relationship with other pits across the solar system show that they are most similar to pits found in northern Iceland and on Nyx Mons, Venus. Assuming a similar mode of formation suggests a collapse mechanism related to dilational faulting rather than an explosive mechanism as the mode responsible for PCC pit formation. The consistent alignment of pit crater chains with extensional fractures and normal faults on the laccolith, along with the lack of raised rims and ejecta surrounding pit craters support this conclusion. Additionally, field observations show that pit crater morphology is quite variable and that the properties of the material in which pits form (i.e., mechanical strength) in addition to the amount of void space that is created likely controls what shape a pit initially forms rather than mechanism of formation. Chapter 3 of this thesis focuses on my study of recent deformation within the Puyehue volcano caldera, a 2.5 km wide crater at its summit. Analysis of optical satellite imagery reveals the appearance of ring fractures inside the summit caldera beginning in 2017. Subsequent snow free images, available at nearly a yearly cadence, have shown that ring fractures have continued to form and grow at least until 2024. Alongside ring fractures, we also find evidence of pit crater and pit crater chain formation occurring within the caldera suggesting the existence of similar conditions (e.g., extension) responsible for pit crater formation at Cordón Caulle. To quantify the deformation documented in optical satellite images, we analyzed digital elevation models (DEM) produced from optical and synthetic aperture radar (SAR) satellite imagery. Elevation profiles across the caldera show that it has subsided nearly 35 m in the 8 year period from 2016 to 2024. Our profiles also show that subsidence is not occurring uniformly across the entire caldera, but rather it is localized around its center, morphing the caldera into a funnel shape. Modeling of caldera collapse mechanisms has shown the formation of funnel shaped calderas to be consistent with collapse into a deep magma chamber. Consequently, we consider that the current Puyehue caldera subsidence may be related to the 2011 Cordón Caulle eruption due to evidence of the Puyehue magma reservoir partially feeding the eruption. However, the six year offset between the first physical signs of subsidence and the 2011 eruption strays from typical caldera collapse response timing and highlights the need for future investigation into the underlying processes responsible for caldera subsidence at PCC.