MIKESELL , D.

We introduce and compare new compression approaches to obtain regularized solutions of large linear systems which are commonly encountered in large scale inverse problems. We first describe how to approximate matrix vector operations with a large matrix through a sparser matrix with fewer nonzero elements, by borrowing from ideas used in...

Large earthquakes (Mw > 6.5) in the shallow subduction zone are powerful sources of destructive tsunamis. The uplift at the source related to those events also triggers coseismic ionospheric disturbances (CIDs) that are routinely detected using Global Navigation Satellite Systems (GNSS) multi-frequency measurements. Developed over the last two...

On 4 May 2018, a Mw 6.9 earthquake ruptured on the south flank of the Kilauea volcano, Hawaii. The rupture of this largest earthquake in the Hawaii region since 1975 extended offshore and a small tsunami was identified on regional tide gauges. Then we expect a significant shaking of the ionosphere, the ionized layer of the Earth's atmosphere...