I am interested in the use of airborne and ground-based LiDAR for volcanology studies. I worked on a small project looking at inflation-deflation cycles at Lone Star geyser in Yellowstone National Park. Ground-based LiDAR scans were captured every 20 minutes from a fixed point overlooking the outwash plain.

LiDAR point cloud of Lone Star geyser. Note the geyser mound at the right and the laser 'shadow' behind it.

Sinter cone of Lone Star Geyser (Attribution: Daniel Schwen [CC BY-SA 4.0, via Wikipedia]).

The hope was that differences between successive scans would reveal ground deformation as the geyser system filled over its 3-hour eruption cycle. Unfortunately movement of the scanner mostly cancelled out a very small deformation signal. Nevertheless this was an exciting study that shows how precise LiDAR scanning has become!