Rattlesnake Ridge in Yakima has been on a landslide watch for months, and now Yakima thieves have stolen a piece of valuable detection equipment that has been continuously monitoring the movement of the ridge.

The stolen seismometer is worth about $18,000 and went missing after a routine inspection of the site which has been closed to the public for weeks due to safety issues.

It looks like if it's not nailed down, anything is up for grabs to thieves ... you can get the complete details from our news partner, KNDO, here.