EARTHQUAKE AWARENESS

Bluffdale Ground Keeps Moving; 139 Earthquakes So Far

Feb 25, 2019, 7:12 PM | Updated: Feb 26, 2019, 1:43 pm

BLUFFDALE, Utah — The series of small earthquakes in the south end of the Salt Lake Valley continued Monday with monitoring stations recording several more small tremors.

Since the seismic activity started on Feb. 13, there have been 139 earthquakes centered in the Bluffdale area, according to the University of Utah Seismograph Stations. The largest was a 3.7 magnitude on Feb. 15.

“I consider it a foreshock, mainshock, aftershock sequence,” said Jim Pechmann, a seismologist at the University of Utah.

The bulk of the temblors have been aftershocks, Pechmann said, with the largest aftershock hitting early Saturday morning and registering in at 3.1 magnitude—spawning a flurry of small quakes Sunday and Monday.

It’s not clear if the earthquakes are originating from the well-known Wasatch Fault or from a different, yet-to-be-named fault located below Bluffdale, Pechmann added.

The depth of the Bluffdale quakes makes it difficult to determine whether the Wasatch Fault is to blame, but history has shown that the 240 mile-long fault is not known for producing this type of small earthquake.

“Most of the time it likes to kick off magnitude 7 or so earthquakes rather than little earthquakes,” Pechmann said.

Jim Pechmann, Siesmologist at the University of Utah

The biggest misconception about the cluster of earthquakes, Pechmann said, is that it’s somehow delaying a larger, more catastrophic seismic event.

“Small earthquakes do not relieve enough pressure to delay a large earthquake,” he said. “They don’t act as a safety valve. In fact, they do increase the probability of larger earthquakes a little bit.”

The probability is roughly one in twenty that each quake could be a foreshock to a larger earthquake in five days, according to the U’s seismology department.

Since measurements started being recorded in 1962, the largest earthquake in the Bluffdale area was a 4.1 magnitude in March, 1992.

KSL 5 TV Live

Top Stories

Earthquake Awareness

(USGS)...
Josh Ellis, KSL TV

Magnitude 2.5 micro earthquake felt across Salt Lake Valley

Seismologists said Friday's earthquake was another aftershock of the March 18, 2020, magnitude 5.7 quake.
4 months ago
A 5.7-magnitude earthquake with an epicenter near Magna rocked the Wasatch Front on March 18, 2020....
Eliza Pace, KSL TV

Utah to receive $1.5 million from FEMA for 2020 earthquake damages

FEMA has approved $1.5 million for "public assistance funding" for the Magna earthquake of 2020 according to a release.
7 months ago
The earthquake's epicenter was about 14 miles southeast of Wells, Nevada. (USGS)...
Kelsey Ott, KSL TV

Magnitude 4.7 earthquake shakes northeast Nevada

People reported feeling the quake from West Wendover to Battle Mountain.
1 year ago
A 5.7-magnitude earthquake with an epicenter near Magna rocked the Wasatch Front on March 18, 2020....
Dan Spindle, KSL TV

Thousands Participating In ‘Great Utah ShakeOut’

Utah will participate in the largest earthquake drill we've ever seen just over a year removed from the Magna earthquake.
1 year ago
FILE...
Matthew Jacobson, KSL TV

‘Earthquake Swarm’ Occurring South Of Milford

An area south of Milford is experiencing an "earthquake swarm," according to the University of Utah Seismograph Stations. 
2 years ago
...
Morgan Wolfe, KSL TV

Utah Earthquake: Some Homes Still Damaged 1 Year Later

One Magna resident is looking back on the Utah earthquake that damaged his home - and his mental health.
2 years ago

Sponsored Articles

Happy diverse college or university students are having fun on their graduation day...
BYU MBA at the Marriott School of Business

How to choose what MBA program is right for you: Ask these questions before you apply!

Wondering what MBA program is right for you? Take this quiz before you apply to see if it will help you meet your goals.
Cloud storage technology with 3d rendering drawer with files in cloud...
PC Laptops

How backing up your computer can help you relieve stress

Don't wait for something bad to happen before backing up your computer. Learn how to protect your data before disaster strikes.
young woman with stickers on laptop computer...
Les Olson

7 ways print marketing materials can boost your business

Custom print marketing materials are a great way to leave an impression on clients or customers. Read for a few ideas to spread the word about your product or company.
young woman throwing clothes to organize a walk in closet...
Lighting Design

How to organize your walk-in closet | 7 easy tips to streamline your storage today

Read our tips to learn how to organize your walk-in closet for more storage space. These seven easy tips can help you get the most out of your space.
Types of Computer Malware and Examples...
PC Laptops

5 Nasty Types of Computer Malware and Examples | Everything You Need to Know to Keep Your Computer and Family Safe

Here are the different types of computer malware and examples that could potentially infect your computer.
tips how to quit smoking...

7 Tips How to Quit Smoking | Quitting Smoking Might be One of the Hardest Things You Ever Do but Here’s Where You Can Start

Quitting smoking cigarettes can be incredibly difficult. Here are 7 tips how to quit smoking to help you on your quitting journey.
Bluffdale Ground Keeps Moving; 139 Earthquakes So Far