Very-long-period seismic events reveal evolving magma temperature and volatile contents over the 2008-2018 eruption of Kīlauea Volcano.
Joshua Crozier
USGS
- Date & Time
- Location
- Online-only seminar via Microsoft Teams
- Summary
Wavelet based seismic event detection yields a catalog of thousands of very-long-period seismic signals over the over the 2008-2018 eruption of Kīlauea Volcano, HI, USA. These represent impulsively triggered magma oscillations within the shallow conduit and lava lake, and thus provide a direct probe of the magma system. We invert for these events, along with geodetic and lava lake data, using a petrologically informed model of magma dynamics. The inversions reveal significant variation in magma temperature and highly disequilibirum volatile contents over days to years, and suggest an evolving magma system geometry. Such changes can modulate eruption style and hazards, making in situ inference of their temporal evolution vital for volcano monitoring.
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