tornillo

A seismic signal associated with magma flow within a volcano and consisting of low frequency seismic waves that appear on a seismogram as a line resembling a screw seen from the side.

A small tree, Prosopis pubescens, native to Mexico and parts of the United States that has spirally twisted pods; the screw bean

A low-frequency seismic event associated with volcanoes

shrub or small tree of southwestern United States and northwestern Mexico having spirally twisted pods