Member Since 1993
Julia E. Hammer
Professor, University of Hawaii at Manoa
AGU Research
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Evaluating the Role of Titanomagnetite in Bubble Nucleation: Novel Applications of Low Temperature Magnetic Analysis and Textural Characterization of Rhyolite Pumice and Obsidian From Glass Mountain, California
GEOCHEMISTRY, GEOPHYSICS, GEOSYSTEMS
22 april 2024
Kelly McCartney, Julia E. Hammer, Thomas Shea, St...
Nucleation of H2O vapor bubbles in magma requires surpassing a chemical supersaturation threshold via decompression. The threshold is minimized in ...
Evaluating the Role of Titanomagnetite in Bubble Nucleation: Rock Magnetic Detection and Characterization of Nanolites and Ultra‐Nanolites in Rhyolite Pumice and Obsidian From Glass Mountain, California
GEOCHEMISTRY, GEOPHYSICS, GEOSYSTEMS
22 april 2024
Stefanie A. Brachfeld, Kelly McCartney, Julia E. ...
We document the presence, composition, and number density (TND) of titanomagnetite nanolites and ultra‐nanolites in aphyric rhyolitic pumice,...
Sessile drop experiments involving rhyolite liquid and mineral pairs performed to evaluate interfacial energies and better understand bubble nucleation
A JACK OF SMALL TRADES: ZOOMING IN ON THE NANO- AND MICROSCALE TO BETTER UNDERSTAND MAGMATIC PROCESSES II POSTER
volcanology, geochemistry and petrology | 13 december 2023
Kelly McCartney, Julia E. Hammer, Thomas Shea
Bubble nucleation in magma occurs either heterogeneously (formation on a mineral substrate) or homogeneously (formation without a mineral substrate). ...
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Preservation of Magma Recharge Signatures in Kīlauea Olivine During Protracted Storage
JOURNAL OF GEOPHYSICAL RESEARCH: SOLID EARTH
13 january 2023
Adrien Mourey, Julia E. Hammer, Thomas Shea
Recharges of magma underneath basaltic volcanoes can occur as precursory events prior to an eruption but are not always revealed in geophysical dat...
Magmatic Plumbing Samples a Smorgasbord: At Least Four Components in Lava Erupted From Fissure 17, Kilauea 2018
THE MAGMATIC PLUMBING SYSTEMS OF OCEANIC ISLANDS II POSTER
volcanology, geochemistry and petrology | 15 december 2021
Alan G. Whittington, Justice Lira, Brenna A. Halve...
In 2018, a chemically complex lava erupted from Fissure 17 during the Lower East Rift Zone (LERZ) eruption of Kilauea, Hawaii. Fissure 17 was active f...
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Mafic and Crystal-Rich Inclusions in Evolved Lavas from the LERZ 2018 Eruption at Kīlauea Volcano
THE MAGMATIC PLUMBING SYSTEMS OF OCEANIC ISLANDS II POSTER
volcanology, geochemistry and petrology | 15 december 2021
Rose I. Gallo, Joseph Boro, Thomas Shea, Cheryl A....
The 2018 Lower East Rift Zone eruption of Kīlauea volcano included an unusual evolved eruptive phase from Fissure 17 (F17), a fissure segment offset f...
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Correlation of Calculated Cooling Rates with Textural Variations of the Fissure 8 Flow Field, Kīlauea 2018: A method for determination of primary and secondary textures
THE STORAGE, TRANSPORT, AND ERUPTION OF MAGMA USING FIELD OBSERVATIONS, LABORATORY APPROACHES, AND MODELING IV POSTER
volcanology, geochemistry and petrology | 15 december 2021
Brenna A. Halverson, Alan G. Whittington, Stuart M...
Textures of cooled lava depend upon the cooling rate, displaying either primary textures of flowing lava or secondary textures overprinting the primar...
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Rheological Evolution of the Ahuʻailāʻau Fissure lavas during the 2018 Kīlauea lower East Rift Zone eruption
THE STORAGE, TRANSPORT, AND ERUPTION OF MAGMA USING FIELD OBSERVATIONS, LABORATORY APPROACHES, AND MODELING IV POSTER
volcanology, geochemistry and petrology | 15 december 2021
Einat Lev, Jasper Baur, colton conroy, Brenna A. H...
A comprehensive understanding of the dynamics and evolution of lava rheology during active flow is required for effective mitigation of lava flow haz...
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