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InSAR and its applications in geo-engineering: case studies with different platforms and sensorsInSAR (Interferometric Synthetic Aperture Radar) is a microwave remote sensing technique that uses the phase shift of radar signals acquired at different timeframes to measure or monitor ground deformation. InSAR has many implications, such as monitoring ground deformation caused by natural- or geo-hazards, e.g., earthquakes, volcanoes, landslides, anthropogenic activities, groundwater pumping, underground mining, and hydrocarbon extraction. InSAR can also be utilized to study infrastructure displacements and environmental changes, such as monitoring changes in surface water level, mapping floods, soil moisture contents (at a shallow depth), and deforestation. The first significant application of SAR is the deployment of real-aperture radar interferometry to study the topography of the Moon in the early 1970s. However, InSAR was not widely used due to the limitations of computation capacity and the sparse availa-ble SAR data until the early 1990s. A major milestone for InSAR applications came in the 1990s when researchers used SAR data to measure ground deformation induced by the Landers Earthquake in California, and one of the publications landed on the cover of Nature magazine. This landmark achievement brought widespread recognition to the potential of InSAR for mapping ground deformation. Over the past two decades, the computation power and availability of SAR data have improved considerably with the launch of more satellites carrying SAR sensors. This paper presents a brief introduction to the history and fundamentals of InSAR, as well as case studies of its applications in the geo-engineering fields, including landslide displacement monitoring and underground excavation-induced ground subsidence mapping.
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Forging a greener future: the imperative of decarbonizing steel productionAs evening approaches in Pueblo, Colorado, the vast steel mill begins to transform under the setting sun. The EVRAZ Rocky Mountain Steel mill, a longstanding institution in this industrial area for more than a century, is evolving as part of the push to decarbonize the global steel industry. Collaborating with Lightsource bp, the mill is shifting to solar energy, positioning itself as the first steel mill in North America to operate predominantly on solar power. The solar conversion is set to abate almost half a million tons of greenhouse gas emissions.
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The Colorado geothermal frontierIn Chaffee County Colorado, residents and visitors alike have long taken advantage of the natural hot springs generated by thermal anomalies deep underground. Soon, this same heat may be tapped to provide energy for the local community. Here, and across Colorado, geothermal is the focus of renewed attention and funding, with $7.7 million awarded for geothermal technology from the Colorado Energy Office, and further private investment. This project in Chaffee County was highlighted last week in an article from the Colorado Sun, noting the investment of Icelandic companies.
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Oil depot fire in Proletarsk rages on for sixth dayFirefighters are now in their sixth day of battling a massive blaze that erupted at an oil storage facility in Proletarsk, Russia. The fire ignited early on Sunday, August 18th, following the downing of Ukrainian drones by Russian air defense systems near the town.
