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My research objectives are to characterize and quantify spatial and temporal patterns of temperature, pressure, chemistry, and phase (e.g. liquid or gas) in volcano-hydrothermal systems and relate them to magmatic and/or volcanic activity.
Quantitative understanding of groundwater and gas-rich fluid dynamics in volcanic areas is important for several reasons: 1) pressure, temperature and chemical changes in the hydrothermal system might signal one of the earliest warnings of volcanic unrest, 2) Many of the geochemical, geodetic, and seismic signals measured at the volcano’s surface have hydrothermal origins or magmatic origins modulated by the intervening hydrothermal system, 3) as a major source of hazard such as propellant in steam-driven explosions, lubricant in mudflows, and transport agent for toxic constituents such as arsenic and mercury, 4) guiding exploration and mining of geothermal energy and mineral deposits. To better understand these complex systems I integrate and synthesize hydrologic, geochemical, geologic, and geophysical methods. My research is intended to support the USGS Volcano Hazards Program’s broad goal of lessening the harmful impacts of volcanic activity and the Geothermal Project's goals of exploring reservoirs of hot fluids in the Earth’s crust.
PhD (1999), The Hebrew University of Jerusalem
Review papers (publications can be found on Google Scholar):
Hurwitz et al., 2021, Groundwater dynamics at Kīlauea Volcano and vicinity, Hawaiʻi: USGS Prof. Pap. 1867, 28 p.
Hurwitz & Manga, 2017. The fascinating and complex dynamics of geyser eruptions. Ann. Rev. Earth Planet. Sci., 45, 31-59.
Hurwitz & Lowenstern, 2014. Dynamics of the Yellowstone hydrothermal system. Rev. Geophys., 52, 375-411.
Ingebritsen, Geiger, Hurwitz, and Driesner, 2010. Numerical simulation of magmatic hydrothermal systems. Rev. Geophys., 48(1).