Abstract Measurements of present‐day surface deformation are essential for the assessment long‐term seismic hazard. The European Space Agency's Sentinel‐1 satellites enable global, high‐resolution observation crustal motion from Interferometric Synthetic Aperture Radar (InSAR). We have developed automated InSAR processing systems that exploit first ~5 years data to measure motions ~800,000‐km 2 Anatolian region. Our new 3‐D velocity and strain rate fields illuminate patterns dominated by...

Abstract Earthquakes are caused by the release of tectonic strain accumulated between events. Recent advances in satellite geodesy mean we can now measure this interseismic accumulation with a high degree accuracy. But it remains unclear how to interpret short-term geodetic observations, measured over decades, when estimating seismic hazard faults accumulating centuries. Here, show that rates calculated from measurements around major transform fault constant for its entire 250-year period,...

Abstract The North Anatolian Fault (NAF) is a major tectonic feature in the Middle East and most active fault Turkey. central portion of NAF region Global Navigation Satellite Systems (GNSS) scarcity. Previous studies interseismic deformation have focused on aseismic creep near town Ismetpasa using radar data acquired single line‐of‐sight direction, requiring several modeling assumptions. We measured across both ascending descending from Envisat satellite mission between 2003 2010. Rather...

The need for implementing efficient value-adding tools able to optimise Earth Observation data usage, compels the scientific community find innovative solutions downstream of information. In this paper we present an unsupervised and automated approach based on Principal Component Analysis (PCA) K-means clustering detect patterns natural or anthropogenic ground deformation from Interferometric Synthetic Aperture Radar (InSAR) Time Series. For our proof-of-concept, focus Valle d'Aosta region...

Abstract The relationship between aseismic slip and tectonic loading is important for understanding both the pattern of strain accumulation along a fault its ability to generate large earthquakes. We investigate spatial distribution temporal evolution creep on western North Anatolian Fault (NAF) using time series analysis Envisat interferometric synthetic aperture radar (InSAR) data, covering full extent 1999 Izmit Düzce earthquake ruptures spanning 2002–2010. Discontinuities in...

Probabilistic Seismic Hazard Assessment (PSHA) is a widely used tools to evaluate the threat of seismic events in earthquake-prone regions and particularly useful for engineering decision-making setting construction design standards. However, outside these communities results PSHA analysis are non-intuitive, disaster risk managers. In cases, specific hazard scenarios often demonstrate potential scale challenge. For scenario-based calculations aleatory uncertainties traditionally accounted by...

Natural hazard-related disasters result in tens of thousands deaths and billions economic losses annually, with their frequency intensity projected to increase due climate change. These hazards, such as floods, landslides, volcanic eruptions, often interact ways that amplify impacts, creating cascading or compounding risks. Despite these complexities, most hazard databases focus on single-hazard events, failing capture critical interactions. To address this gap, we are developing a...

We present observations and models of the Sulaiman Range western Pakistan that shed new light on evolution deformation fold-thrust belts. Earthquake source inversions show seismic in range is concentrated thick pile sediments overlying underthrusting lithosphere Indian subcontinent. The slip vectors earthquakes vary strike around margin range, tandem with shape topography, suggesting gravitational driving forces arising from topography play an important role governing region. Numerical...

Abstract Understanding the evolution of continental deformation zones relies on quantifying spatial and temporal changes in rates tectonic structures. Along eastern boundary Pamir‐Tian Shan collision zone, we constrain secular variations rock uplift for a series five Quaternary detachment‐ fault‐related folds from their initiation to modern day. When combined with GPS data, decomposition interferometric synthetic aperture radar time constrains pattern surface deforming at decadal 1–5 mm/yr....

Interferometric Synthetic Aperture (InSAR) time series measurements are widely used to monitor a variety of processes including subsidence, landslides, and volcanic activity. However, interpreting large InSAR datasets can be difficult due the volume data generated, requiring sophisticated signal-processing techniques extract meaningful information. We propose novel framework for number ground displacement derived from using three-step process: (1) dimensionality reduction an stack; (2)...

Abstract This paper introduces a methodology for characterizing the breadth of natural hazard types, interrelationships, and risk scenarios in Global South urban areas, focusing on Nairobi, Kenya, Istanbul, Türkiye. Our approach involves (a) comprehensive characterization multi‐hazards their interrelationships an setting, (b) collaborative development relevant multi‐hazard with local disaster reduction (DRR) stakeholders, (c) analysis potential integrating these into DRR efforts. Using...

Abstract. More than half of all the people in world now live dense urban centres. The rapid expansion cities, particularly low-income nations, has enabled economic and social development millions people. However, many these cities are located near active tectonic faults that have not produced an earthquake recent memory, raising risk losing hard-earned progress through a devastating earthquake. In this paper we explore possible impact earthquakes can on city Santiago Chile from various...

Hanoi has experienced rapid urbanisation over the last few decades, putting intense pressure on its natural resources, such as groundwater, but also local authorities to meet demand for infrastructure, housing and public amenities. Recent studies using Interferometric Synthetic Aperture Radar (InSAR) measured rates of subsidence in documenting evolution subsiding areas. These have primally attributed high increased extraction groundwater. In this study we use Sentinel 1 InSAR data six years...

Abstract Major faults of the Tien Shan, Central Asia, have long repeat times, but fail in large ( 7+) earthquakes. In addition, there may be smaller, buried off major which are not properly characterized or even recognized as active. These all pose hazard to cities along mountain range front such Almaty, Kazakhstan. Here, we explore seismic and risk for Almaty from specific earthquake scenarios. We run three historical‐based scenarios (1887 Verny 7.3, 1889 Chilik 8.0 1911 Chon‐Kemin 8.0) on...

Abstract. A growing number of large cities are located near poorly understood faults that have not generated a significant earthquake in recent history. The Lembang Fault is one such fault the city Bandung West Java, Indonesia. slip rate on this debated, with estimates ranging from 6 to 1.95–3.45 mm yr−1, derived GNSS (global navigation satellite system) campaign and geological measurements respectively. In paper we measure surface deformation across region resolve using radar interferometry...

Sand movement is one of the main environmental hazards in Northern Sudan that threaten livelihood and rural communities. This paper investigates for first time use Synthetic Aperture Radar (SAR) offset tracking technique detecting sand Sudan, distinguishes impact influencing factors: wind speed/direction, vegetation topography. High-resolution images from Sentinel-1 satellite were used generation displacement maps. Three different dune fields with characteristics investigated a study period...

Coastal sediment grain size is an important factor in determining coastal morphodynamics. In this study, we explore a novel approach for retrieving the median (D50) of gravel-dominated beaches using Synthetic Aperture Radar (SAR) spaceborne imagery. We assessed by thirty-six Sentinel-1 (C-band SAR) satellite images acquired May and June 2022 2023, three NovaSAR (S-band 2022, different training sites one test site across England (the UK). The results from C-band data show strong positive...

Abstract Knowledge of earthquake source faults is crucial for the calculation robust Coulomb stress models. However, are often poorly constrained, especially pre‐instrumental events, and these historical earthquakes commonly studied with little or no consideration other nearby events. We introduce an approach using Stress Transfer (CST) modeling to investigate sequences constrain possible faults. Using instrumental records from Büyük Menderes Graben, western Türkiye, we create ensemble...

Traditional applications of Interferometric Synthetic Aperture Radar (InSAR) data involved inverting an interferogram stack to determine the average displacement velocity. While this approach has useful in continuously deforming regions, much information is lost by simply fitting a line through time series. Thanks regular acquisitions across most world ESA Sentinel-1 satellite constellation, we are now position explore opportunities for near-real deformation monitoring. In paper present...

Geodetic measurements of crustal deformation rates provide important information on earthquake hazard, indicating that strain is accumulating either faster or slower than the rate suggested by known earthquakes. With COMET-LiCSAR InSAR processing system, which performs large-scale automated and timeseries analysis Sentinel-1 data, we aim to generate maps for entire Alpine-Himalayan Belt, use these investigate seismic hazard. In this paper will present results Anatolia. Deformation also a key...

Coastal dunes play an important role in coastal erosion risk management, where they act as a dynamic natural sea defence line. Formby coast is part of the Sefton Northwest England and one largest most rapidly evolving sand dune systems UK. Such require continuous comprehensive monitoring activity to understand their dynamics. In this research, we investigate use airborne LiDAR digital terrain model DTMs for dynamics at between 1999 2020. We found that rate elevation change beach areas ranges...