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- G13C-0276: Deformation processes at Masaya Volcano, Nicaragua from 2018 to 2024, analyzed using InSAR time-series and geodetic modeling
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Board 0276‚ Hall EFG (Poster Hall)NOLA CC
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Elizabeth Johnson, The Pennsylvania State University (First Author, Presenting Author)
Young Cheol Kim, The Pennsylvania State University
Christelle Wauthier, The Pennsylvania State University
Masaya volcano is located around 20 km southeast of Nicaragua’s capital city. Masaya volcano’s recent activity includes venting volcanic gases, hosting an active lava lake, and producing small explosions. Previously, Masaya experienced at least four large and explosive eruptions, creating a volcanic caldera. This study uses radar data from January 2018 to February 2024 to investigate ground deformation at Masaya volcano. The radar data showed that from 2018 to mid-2022, the ground north of Masaya’s active crater moved away from the satellite by about 3 cm, suggesting Masaya’s magma reservoir was deflating. However, from mid-2022 to 2024, the ground moved towards the satellite, suggesting the magma reservoir was inflating, possibly due to a new magma surge. A spherical magma chamber model was used to determine the most likely location, depth, and volume change of Masaya volcano’s magma reservoir. For another smaller signal surrounding Masaya volcano’s active crater, modeling results were visually compared to the radar observations to determine a range of likely depths and volume changes for a shallow magma reservoir.
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