Dennis Olsen
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FILE - In this Jan. 11, 2014 photo Dennis Olsen measures a fissure which he said was about an inch wide and at least eight to ten inches deep, in his rural driveway following a frost quake in Waupun, Wis. Known technically as cryoseism, frost quakes are a rare natural phenomena that happen when the temperature drops suddenly, causing moisture in the ground to freeze and expand. They can cause an earthquake-like rumble sometimes with loud, booming noises. (AP Photo/The Reporter, Aileen Andrews, File)
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In a Saturday, Jan. 11, 2014 photo, Dennis Olsen measures a giant fissure, which he measured to be an inch wide and at least eight to ten inches deep, in his rural driveway in Waupun, Wis., after a weather phenomenon known as an ice quake occured recently. It results from water freezing and expanding in the soil and bedrock. (AP Photo/The Reporter, Aileen Andrews) NO SALES
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In a Saturday, Jan. 11, 2014 photo, Dennis Olsen measures a giant fissure, which he measured to be an inch wide and at least eight to ten inches deep, in his rural driveway in Waupun, Wis., after a weather phenomenon known as an ice quake occured recently. It results from water freezing and expanding in the soil and bedrock. (AP Photo/The Reporter, Aileen Andrews) NO SALES
