Researching the Earth—and a Few of Its Neighbors

Abstract

During my career, our knowledge of erupting geysers and volcanoes in the Solar System has exploded. In this prefatory, I tell how I became fascinated with high-speed processes through studying meteorite impact dynamics, and then how my initial idea of studying Old

Imaging the Deep Subsurface Plumbing of Old Faithful Geyser From Low‐Frequency Hydrothermal Tremor Migration

“…Old Faithful Geyser, within the UGB, is one of the most studied geysers in the world (Hurwitz & Manga, ; Kieffer, ) not only due to its fame from the near‐regularity of its ~90‐ to 100‐min eruption interval but also because it is relatively distant from nearby hydrothermal features (Kieffer, ; Wu et al, ). An earlier study used in situ cameras along with temperature and pressure probes to study the shape, water level, and temperature variations within the shallow fissure‐like conduit down to 21‐m depth (Hutchinson et al, ).…”

“…Old Faithful Geyser, within the UGB, is one of the most studied geysers in the world (Hurwitz & Manga, 2017;Kieffer, 2017) not only due to its fame from the near-regularity of its ~90-to 100-min eruption interval but also because it is relatively distant from nearby hydrothermal features (Kieffer, 1984;Wu et al, 2017). An earlier study used in situ cameras along with temperature and pressure probes to study the shape, water level, and temperature variations within the shallow fissure-like conduit down to 21-m depth • We discover low-frequency tremor associated with Old Faithful from a dense seismic array deployed in 2016 • We employ seismic interferometry and back projection to locate the low-frequency tremor source in Old Faithful's deep plumbing structure • We illuminate Old Faithful's fluid pathway down to ~80-m depth, tracking the phase transition horizon throughout the eruption cycle Supporting Information:…”