5.0 magnitude: Rocky Mountain House earthquake upgraded, 2nd largest in Alberta history
A 5.0 magnitude earthquake shook central Alberta Wednesday night.
At approximately 9:23 p.m., Earthquakes Canada reported a 4.1 magnitude earthquake 37 kilometres north of Rocky Mountain House.
That magnitude was upgraded to 5.0 on the Richter scale by Earthquakes Canada on Thursday afternoon.
The upgrade means it was Alberta's second largest on record.
People as far north as Edmonton and as far south as Calgary reported feeling "weak shaking" on Earthquake Canada website's scale of intensity.
"We’ve had reports of people who felt it out in the Leslyville area, certainly in the Arbutus area," Laura Button from the Town of Rocky Mountain House told CTV News Edmonton.
According to Rocky Mountain House's sewer and water supervisor, no damage was done to any of the town's sewage infrastructure.
"Nothing exciting happened, nothing broke," Doug Fraser said.
The tremors didn’t trigger any system alarms at the water treatment plant, and so far no one has reported any private property damage either.
"We had no complications whatsoever," Rocky Mountain House water treatment plant manager Gary Lewsaw told CTV News Edmonton.
One University of Alberta geo-physicist told CTV News Edmonton that seismic activity in central Alberta has increased in the past decade. According to Jeff Gu, that’s worth studying.
"Some of it was linked to gas production, oil production, and some of them were natural, and then there was an earthquake that was linked to wastewater disposal," Gu said.
Alberta’s energy regulator said Wednesday's earthquake was not connected to wells or drilling.
It pegged the epicentre nine kilometres below the surface, which is typically deeper than human-caused earthquakes.
Rocky Mountain House is approximately 139 kilometres southwest of Edmonton.
With files from CTV News Edmonton's Jeremy Thompson
CTVNews.ca Top Stories
Family in remote northern Ont. reeling after daughter killed in fire, home destroyed
A family in the remote community of Peawanuck, Ont., is dealing not only with the death of their young daughter, but the loss of everything they owned in a Jan. 28 house fire.

'Laverne & Shirley' actor Cindy Williams dies at 75
Cindy Williams, who was among the most recognizable stars in America in the 1970s and 80s for her role as Shirley opposite Penny Marshall's Laverne on the beloved sitcom 'Laverne & Shirley,' has died, her family said Monday.
Why adding a bit of milk to your morning coffee might be good for you
Adding some milk to your morning coffee may boost the body's anti-inflammatory response, new research out of Denmark shows.
A short-lived 'punch in the face' cold snap is coming for Eastern Canada
The beginning of February is expected to bring Arctic-like temperatures across much of Eastern Canada, thanks to frigid air from the polar vortex. The cold snap will descend on Eastern Canada this week, with temperatures becoming seasonable again on Sunday. In between, much of Ontario, Quebec and Atlantic Canada can expect the coldest days yet this winter.
Late Jean Vanier sexually abused 25 women, says non-profit he founded
A report commissioned by a non-profit organization founded by the late Jean Vanier says the Canadian sexually abused 25 women during his decades with the group.
Girl, 6, dies after T-bar lift incident at Quebec ski resort
A six-year-old girl died in hospital Sunday night after being involved in an incident at the Val-Saint-Côme ski resort in Lanaudiere. Quebec police are investigating, though details into the event are not yet known. Officers indicated that it involved a T-bar lift, but they were not able to say more.
Mindbender roller coaster closed after 37 years at West Edmonton Mall
The Mindbender roller coaster at Galaxyland has been shut down, West Edmonton Mall announced on Monday. The redevelopment of the area is already underway, and the roller coaster is being decommissioned and removed.
Nike sues Lululemon, says footwear infringes patents
Nike sued Lululemon Athletica on Monday, saying that at least four of the Canadian athletic apparel company's footwear products infringe its patents.
'Just incredible': Winnipegger and former teammate remembers Bobby Hull
Without Bobby Hull, the Winnipeg Jets wouldn’t be in the NHL right now. That’s how one of his former teammates feels about the late Jets forward.