Top: Stand of timber in the process of being harvested was instead knocked over by the lateral blast. An estimated 4 million board feet of timber was destroyed. (Photograph by H.H. Kieffer.)

Bottom: Small eruption of gas and ash from the lava dome caused by violent release of volcanic gas or the geyser-like flashing of superhot ground water to steam. (Photograph by Dan Dzurisin.)

<https://pubs.usgs.gov/gip/volcus/page21.html>
Maintained by John Watson
Updated 06.24.97