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Person

Tamar Elias

Chemist

Volcano Science Center

Email: telias@usgs.gov
Office Phone: 808-967-8826
Fax: 808-967-8890
ORCID: 0000-0002-9592-4518

Supervisor: Christina Neal
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Puhimau thermal area, located in the upper East Rift Zone of Kīlauea Volcano, Hawai`i formed around 1936 when heat and gases migrated to the surface following a magma intrusion. As of April 2020, the area is about 0.2 km2 in size with regions of steaming ground. The site may be valuable for monitoring changes in gas and heat emissions related to movement of magma down the rift zone. On November 4-5, 2019 we used the accumulation chamber method and thermocouple probes to make 164 measurements of soil CO2 flux and temperature (20 cm depth) at 30-m spacing on a 0.2 km2 grid. Three gas samples were collected from areas of steaming ground on November 5-6, 2019 and analyzed for bulk chemical and carbon isotope (d13C-CO2)...
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In early May 2018, activity at Kīlauea volcano, Hawaii, increased, with heightened ash production from the summit commencing on May 17. Volcanic ash can scavenge volatile components from volcanic plumes, resulting in the deposition of potentially harmful elements during ash fallout. Leaching of these species (e.g., by rainfall or in water catchment systems) can have implications for agriculture, water resources and human health. The U.S. Geological Survey (USGS) is sampling volcanic ash and utilizing ash leachate analyses as part of the assessment of hazards from the ongoing eruption of Kīlauea Volcano. We acquired 30 ash samples erupted from the summit of Kīlauea Volcano and collected downwind between May 10...
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This report documents the SO2 emission rates for the period 2014-2017, from the summit and East Rift Zone eruptions of Kīlauea, along with the wind or plume speed and direction data used to calculate the emission rates. The Kīlauea summit SO2 emission rates are reported every ten seconds, as measured by a novel configuration of 10 fixed, upward looking UV spectrometers (FLYSPEC array), and for days with at least 2 hours of data, the daily means are reported. The plume or wind speeds used to calculate the emission rates are measured by cross correlation of plume features (see William-Jones and others (2006)) or by ground-based anemometer (SDH) and are reported with the emission rates. When the SDH ground based wind...
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