As concerns grow around the Rattlesnake Ridge landslide, a geologist with DNR explains what makes this landslide different from the Oso landslide of 2014.

UNION GAP — While the crack along the Rattlesnake Ridge landslide appears to be wider, the nearly two-year-old slide is actually slowing down, the county’s emergency manager and a geologist ...

The landslide on Rattlesnake Ridge near Union Gap is still moving, but showing signs that it is slowing down. Drone video shows the landslide on Rattlesnake Ridge on January 22, 2018.

A crack in Rattlesnake Ridge south of Union Gap, Wash., seen in this Wed., Jan. 3, 2018 image, has been growing and has prompted evacuations of nearby... (Shawn Gust/Yakima Herald-Republic) More ...

Science at Rattlesnake Ridge has always been secondary to monitoring for public safety, but researchers are contributing to those efforts as well. University of Washington emeritus professor Steve ...

The crack on Rattlesnake Ridge in south-central Washington state is growing at a rate of about 1.4 feet a week.

A Washington State Dept. of Transportation worker surveys the widening crack on Rattlesnake Ridge which by May will send tons of basalt toward the small town of Union Gap. (Photo courtesy WSDOT) Sign ...

Amanda Thomas, assistant professor of seismology and geophysics at the University of Oregon, programs a nodal seismometer on Rattlesnake Ridge south of Union Gap, Wash., Friday, Jan. 26, 2018.

The 373-acre Rattlesnake Ridge, so named long ago by locals, will be the state's 73rd natural area. The Conservancy asked the Arkansas Natural Heritage Commission to manage it.

The 373-acre Rattlesnake Ridge, so named long ago by locals, will be the state's 73rd natural area. The Conservancy asked the Arkansas Natural Heritage Commission to manage it.