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Mark Behn dropping seismometer instrumentation down an ice hole.

Mark Behn dropping seismometer instrumentation down an ice hole.
Mark Behn dropping seismometer instrumentation down an ice hole.
Mark Behn dropping seismometer instrumentation down an ice hole.
Mark Behn dropping seismometer instrumentation down an ice hole.
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334432
Linder, Christopher L.
Mark Behn dropping seismometer instrumentation down an ice hole.
Still Image
07/22/2008
graphics/PD4_greenland/cl_20080722131516.jpg
Mark's seismometer rests at the bottom of a 10-inch-diameter, 8-foot-deep hole he drilled in the ice near North Lake. The black cable connects the seismometer to a recorder, which will log ice cracking and movement.
Image of The Day caption:
This summer, geologist Mark Behn drilled 8 feet down into Greenland's ice sheet and left seismometers at the bottom of the holes to record ice cracking and movement. Researchers will retrieve the instruments next year to see what happened on the ice (how it has melted and shifted) in previous months, in an effort to learn more about melting on the ice sheet (the world's second largest, after Antarctica).
Photo by Chris Linder
© Woods Hole Oceanographic Institution
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