Sara Sayyadi

Sensing environmental conditions in fiber-optic DAS and DTS using a field study of varying installation

Sara Sayyadi, Chris Kratt, Mark B. Hausner, Eileen Martin et autres

Fiber optic Distributed Acoustic Sensing (DAS), and Distributed Temperature Sensing (DTS) hold innovative technologies with significant potential for real-time environmental monitoring in both built (e.g., irrigated agricultural) and natural (e.g., forested) systems. When collocated using loose and tight buffered fiber-optic cables, DTS …

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DAS Observations of Crustal Thickness From a 56 km Infrastructure Fiber

John Louie, Dusty Barnes, Piran J. Watson, Sara Sayyadi et autres

In June 2025 a collaboration between Terēan ® , Sintela, and the Center for Transformative Environmental Monitoring Programs (CTEMPs) at the University of Nevada, Reno (UNR) made distributed acoustic sensing (DAS) recordings for ground-imaging trials. Recording employed Sintela’s ONYX™ peta DAS interrogator. …

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S41B-05: DAS Observations of Crustal Thickness From a 56 km Infrastructure Fiber

John Louie, Louie John, Sara Sayyadi, Chris Kratt

Observation-based analysis of groundwater storage in Vietnam’s Central Highlands: influence of hydro-climatic variability

Sara Sayyadi, Nguyễn Viết Dũng, Heiko Apel, Julian Haas et autres

This study explores the impact of climatic variability on groundwater storage dynamics in the Central Highlands of Vietnam, focusing on the Sesan and Srepok River Basins. Different from traditional analyses with groundwater levels, groundwater storage variations are derived here from (i) the …

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Internal structure of the volcanic island of Surtsey and surroundings: Constraints from a dense aeromagnetic survey

Sara Sayyadi, Magnús Tumi Guðmundsson, James D. L. White, Þorsteinn Jónsson et autres

Surtsey, a young basaltic island off the south coast of Iceland, was built by volcanic activity in 1963–1967 from a pre-eruption oceanic seafloor depth of 130 m. An aeromagnetic survey was carried out in October 2021 over a 60 km2 area covering …

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Advancing hydrological monitoring: Terrestrial gravimetry surveys in the Selke Catchment, Germany

Sara Sayyadi, Daniel Rasche, Marvin Reich, Theresa Blume et autres

In this study, spatial and temporal variations of soil moisture and water storage were monitored with two complementary methods: terrestrial gravimetry and cosmic ray neutron sensing (CRNS). CRNS monitors near-surface soil moisture by measuring low-energy neutron abundance in the near-surface atmosphere, which …

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Observation-Based Analysis of Groundwater Storage in Vietnam's Central Highlands: Influence of Hydro-Climatic Variability

Sara Sayyadi, Heiko Apel, Julian Haas, Tran-Trung Dang et autres

Volcanic tremor associated with the Surtsey eruption of 1963–1967

Sara Sayyadi, Magnús Tumi Guðmundsson, Páll Einarsson

The formation of the island of Surtsey over 3.5 years, remains one of the best-documented volcanic, island-forming eruptions to date. The basaltic submarine volcanic activity was detected on November 14, 1963, where ocean depth was 130 m prior to the eruption at …

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An aeromagnetic survey over the volcanic island of Surtsey off the south coast of Iceland

Sara Sayyadi, Magnús Tumi Guðmundsson, James D.H. White, Þorsteinn Jónsson et autres

Submarine volcanic activity was observed in the Vestmannaeyjar archipelago off the south coast of Iceland in November 1963, at a location where the pre-eruption oceanic depth was 130 m. The eruption continued until July 1967. As a result of the eruption, a …

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Seismic activity associated with the 1963–1967 Surtsey eruption off the coast of South Iceland

Sara Sayyadi, Páll Einarsson, Magnús Tumi Guðmundsson

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3D Gravity modeling of the volcanic island of Surtsey, Iceland

Sara Sayyadi, Magnús Tumi Guðmundsson, Þórdís Högnadóttir, James White et autres

The formation of the oceanic island Surtsey in the shallow ocean off the south coast of Iceland in 1963-1967 remains one of the best-studied examples of basaltic emergent volcanism to date. The island was built by both explosive, phreatomagmatic phases and by …

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Gravity modeling of the volcanic island of Surtsey, Iceland

Sara Sayyadi, Magnús Tumi Guðmundsson, Þórdís Högnadóttir, James D. L. White et autres

The formation of the oceanic island Surtsey in the shallow ocean off the south coast of Iceland in 1963-1967 remains one of the best-studied examples of basaltic emergent volcanism to date. The island was built by both explosive, phreatomagmatic phases and by …

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