PHOENIX (3TV/CBS 5) - The preliminary report from the independent engineers hired by the City of Phoenix to determine what's causing vibrations in a north Phoenix neighborhood found that the Skunk Creek Landfill is not the source of the shaking.

Phoenix shaking homes

Homes are still shaking in a north Phoenix neighborhood. 

Homeowners in the Adobe Highlands neighborhood near 35th Avenue and Pinnacle Peak Road said their houses have been shaking off and on for the last several years. "It's getting worse, it's not getting better," said Kelly Jackson. "Year by year, it's getting worse. It gets more and more and more intense and what's next year going to bring? You just don't know."

Jackson said she typically feels the shaking around the months of April and September. "It always happens when it goes from hot to cold or from cold to hot," Jackson explained. "I think more studies need to be tested at the appropriate time when it's happening. Like in September, maybe have something set up in September and something set up in April, you know when the weather changes."

Engineers with Geo-Logic Associates placed three seismic monitors near the closed landfill and studied the findings during several weeks. The only times vibrations were felt were when a large truck drove by, but nothing that would be felt or heard inside homes. The preliminary report ultimately ruled out the landfill as the cause of the shaking, but they still don't know what the source is.

City still searching for cause of vibrations in north Phoenix neighborhood

"I've been in this business 20-plus years working on landfills and waste management areas and to see the videos you've been recording and the vibrations--that's something not normal for homeowners near a landfill," said Tony Walker, an engineer with Geo-Logic Associates. "It's puzzling, I'll have to admit it's puzzling just from the videos you guys have shown and we don't know what the answer is but I do know the data we put together so far--and it's still ongoing--it's not the Skunk Creek Landfill."

Mysterious shaking rattles north Phoenix neighborhood homes

Walker said at least five homeowners reported feeling shaking while they were conducting their tests but it could not be linked to the landfill. "It's frustrating. I think they should dig a little bit more and see why everybody's feeling that. If it was just me, I would say, 'OK, it's just me.' But when it's everybody feeling it, I think everybody wants answers. I know I do, I know my neighbors do, I know people on the other side that want answers now," Jackson said. The seismic monitors are still out in the area. A full, final report will be released in a few more weeks.

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