Old Faithful Geyser's Mechanics

Above, Old Faithful Geyser in full eruption. Photo by Armand Vaquer.

Ever wondered how Old Faithful Geyser (or other geysers) at Yellowstone National Park erupt?

NPR (National Public Radio) has posted a transcript of a discussion of the mechanics of Old Faithful Geyser. A new study on the geyser has yielded some interesting findings.

Above, the sign at the information desk in the Old Faithful Inn tells
visitors when Old Faithful Geyser will erupt. Photo by Armand Vaquer.

The post begins with:

The Old Faithful Geyser in Yellowstone National Park blows water approximately every 90 minutes. The the mechanics behind this beautiful mystery have been revealed this week in a new study.

To read the transcript, go here.