[Godzilla]

Harmonic tremor is sometimes but not always associated with magma movement.

You said only eruptions - whats moving? Magma, what else causes similar waveforms?

[jboot]

Per your link, magma and gas movements have similar signatures.

This is part of the Great Basin, so the whole groundmass is being stretched like taffy. The activity may not be magmatic, but with the Bodie-Aurora volcano field in close proximity (especially Mud Springs Volcano-3 miles SSW and believed to be the most recent volcanic feature in Nevada), my money is on magma. What we really need is some field work to determine if there is any heat flow and ground deformation occurring. Alas, this spot is not actively monitored and there is probabaly no baseline to compare to.