Safest place to live in Utah during an earthquake

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Safest place to live in Utah during an earthquake

Col. FlaggLevel 34 IlluminatedPosts: 16961Location: Utah County

Re: Safest place to live during an earthquake??

Post by Col. Flagg » May 26th, 2011, 12:34 am

JulesGP wrote:Besides the obvious - 3 states away, where is the safest place to live during an earthquake (safer from IMMEDIATE damage)? For example, if the fault along the Wasatch Front were to go and we had a 7+, would it be more devastating to live right on the fault, or further out in the valley where the ripple effect will grow and all the shock waves will occur?

Jules, think of it this way - what happens when you throw a pebble into a still pool of water? Are the waves bigger closer to the epicenter (entry point) or further out? You are probably safer living closer to a fault line (unless of course it ruptures and you fall into it) - other than that, it would be better to be closer to it (I would think)? Anyone know for sure?



Safest place to live in Utah during an earthquake

mchlwisecaptain of 100Posts: 428Location: Utah

Re: Safest place to live during an earthquake??

Post by mchlwise » May 26th, 2011, 2:34 pm

Scarecrow wrote: So the typically the closer you are to the epicenter, the more damage. But depending on the soil composition and other factors you could see more damage away from the epicenter. Such was the case in the 1989 Loma Prieta EQ, where there was minimal damage in Gilroy, which was just 30 miles from the epicenter, yet 60 miles away in San Francisco (with it's sandy waterlogged soil), there was significant damage.

I was living 12 miles from the epicenter of the 1994 Northridge California earthquake, and the above is true.

Damage WAS worse closer to the epicenter generally, but ground conditions in certain places far away caused damage more significant than areas closer in.

Generally you want to stay away from sandy, watery, landfill areas due to liquifaction. I would stay off of hillsides as well. Faultlines on the surface may also by in VERY different places than the faultline some distance down - which is where epicenters are. You could be living 10 miles away from the surface fault line and still be directly over the epicenter depending on slope of the fault, etc.

The best answer to the question in the thread title is: where the Lord wants you to live.







Safest place to live in Utah during an earthquake

JasonMaster of PuppetsPosts: 18090

Re: Safest place to live during an earthquake??

Post by Jason » May 27th, 2011, 3:15 pm

HeirofNumenor wrote:stay away from the flat land around Utah lake (west of I-15)...liquefaction will get you....also stay out of the Provo canyon river-bottoms, and off the benches...

...you mean all that land that was peddled by former boss for millions and took hundreds of truckloads of dirt (and massive drainage efforts) to get above flood plane....isn't good???


HeirofNumenorthe Heir Of NumenorPosts: 4228Location: UT

Re: Safest place to live during an earthquake??

Post by HeirofNumenor » May 27th, 2011, 3:22 pm

Jason wrote:

HeirofNumenor wrote:stay away from the flat land around Utah lake (west of I-15)...liquefaction will get you....also stay out of the Provo canyon river-bottoms, and off the benches...

...you mean all that land that was peddled by former boss for millions and took hundreds of truckloads of dirt (and massive drainage efforts) to get above flood plane....isn't good???

LOL basically. Good until the quake creates quicksand and mire out of fields, and buildings fall....happened in some sections of Christchurch, NZ this year.


Safest place to live in Utah during an earthquake

JasonMaster of PuppetsPosts: 18090

Re: Safest place to live during an earthquake??

Post by Jason » May 27th, 2011, 3:50 pm

HeirofNumenor wrote:

Jason wrote:

HeirofNumenor wrote:stay away from the flat land around Utah lake (west of I-15)...liquefaction will get you....also stay out of the Provo canyon river-bottoms, and off the benches...

...you mean all that land that was peddled by former boss for millions and took hundreds of truckloads of dirt (and massive drainage efforts) to get above flood plane....isn't good???

LOL basically. Good until the quake creates quicksand and mire out of fields, and buildings fall....happened in some sections of Christchurch, NZ this year.

LOL...as if they aren't getting it in the shorts as it is now (way overbought - lots were going for $40-$75 to developers up until 2002 and at the peak peddling them for $275-$335k if they were on the lake or golf course, $175-275k elsewhere).....now....not so much and falling by the week!


singyourwayhome captain of 1,000Posts: 1047 Contact:

Re: Safest place to live during an earthquake??

Post by singyourwayhome » May 29th, 2011, 6:19 pm

Jules,

Farther is better, generally speaking, but that also is affected by soil type and structure.

The Utah Geological Survey site has lots of great information and maps, http://geology.utah.gov/utahgeo/hazards ... /index.htm" onclick="window.open(this.href);return false;. Some of what they have includes what's below:

To see how shaking intensity relates to the actual fault lines, see this map, http://geology.utah.gov/online/pdf/pi-76.pdf

To find faultlines in your area, click on http://geology.utah.gov/utahgeo/hazards ... qfault.htm and scroll down until you see your county.

To see dangerous areas for liquefaction, see http://geology.utah.gov/utahgeo/hazards ... #liquemaps Find the link for your county at the bottom of the page.

An explanation of how the ground waves travel is found here; http://geology.utah.gov/online/pdf/pi-29.pdf

A good handbook on how, what, why, and how to prepare (including very simple things), see Putting Down Roots in Earthquake Country, http://www.ussc.utah.gov/publications/r ... hquake.pdf



What part of Utah is at greatest risk for earthquakes?

EARTHQUAKE HAZARDS Large earthquakes are possible anywhere in Utah, but they are most likely in a "seismic belt" about 100 miles wide extending north - south along the Wasatch Front and through Richfield to Cedar City and St. George. Utah averages a magnitude 6 earthquake once every 15 to 20 years.

Where in Utah do most earthquakes occur?

Earthquakes occur frequently in Utah, though they tend to be small (below a 5.0 magnitude). The highest-risk zone is along the Wasatch Front, where most of the state's population is located. The larger cities include the state's capital, Salt Lake City, as well as Lehi, Ogden, Orem, Provo, Sandy, and West Valley City.

What should you do in case of an earthquake in Utah?

Drop, Cover, and Hold On!.
Federal, state, and local emergency management experts and other official preparedness organizations all agree that "Drop, Cover, and Hold On" is the appropriate action to reduce injury and death during earthquakes (learn why here). ... .
Wherever you are, protect yourself!.

How likely is an earthquake in Utah?

Magnitude 5.5 – 6.5 earthquakes occur somewhere in Utah on the average of once every 7 years. Estimates of damage from a “direct hit” to one of the Wasatch Front's major metropolitan areas reach $2.3 billion for a magnitude 6.5 earthquake, and more than $830 million for a magnitude 5.5 earthquake.