Seismic map of North America reveals geologic clues, earthquake hazards

Phys.org ^ | 04/23/2020 | Stanford University

[BenLurkin]

[freedumb2003]

CA could drop off any day now.

I read a great book many years ago named “8.0.” It was about an 9.0 earthquake that hit the Memphis area and, for all intents and purposes, cut the country in half as it traveled up the Tennessee Valley all the way to Canada.

Based on this map that is not too far-fetched.

[crusty old prospector]

the researchers were surprised to see changes in stress types and orientations over short distances, with major rotations occurring over only tens of miles

We see that all the time in the earl business.

[crusty old prospector]

I’m not buying the big red blob that runs down the entire East Coast to Florida. It is a passive margin and one would expect tension instead of compression (i.e. normal faults instead of reverse faults.) Glacial rebound all the way down to Florida? Ha.

[SunTzuWu]

Bump...

[Hatteras]

"I read a great book many years ago named “8.0.” It was about an 9.0 earthquake..."

Why didn't they name the book "9.0"?

[Cold Heart]

“Why didn’t they name the book “9.0”?”

My thought too. We need a separate thread:)

[Parmy]

Ping

[Diana in Wisconsin]

We have felt a few in Wisconsin, but I had to move to San Diego to REALLY feel one - moved the furniture away from the walls, things fell and crashed; no one hurt, no building damage though, thank goodness.

The native Californians called those, ‘Baby Quakes’ and just take them in stride. ;)

[Lurker]

“It was about an 9.0 earthquake that hit the Memphis area and, for all intents and purposes, cut the country in half..”

When New Madrid lets go it’s gonna be epic.

L

[madison10]

Because they planned for an 8 and a 9 showed up?

[Bloody Sam Roberts]

CA could drop off any day now.

I'd prefer if they'd just frak off.

[NELSON111]

One day someone will explain how California drops into the ocean from a massive earthquake on a transform fault. Until then-people will just remain ignorant.

[JimRed]

The red area must mean none or near none. In my 76 years mostly spent in the red zone I have felt exactly one, a little tremor just a few years ago.

[freedumb2003]

>>Why didn’t they name the book “9.0”?<<

b/c THEIR title Editor did not have as many typos as me.

It was supposed to be 8.0 hehe

[Mrs.Z]

Nothing on Cascadia???

[zeestephen]

The “New Madrid Seismic Zone” is just north of Memphis.

In early 1812, that area had the most powerful earthquake ever recorded east of the Rocky Mountains.

The initial quake and two aftershocks are all believed to have been at least in the 8.0 range, or higher.

The jolts were so powerful that it caused church bells to ring as far away as Washington D.C.

[hanamizu]

When New Madrid lets go it’s gonna be epic.

---

Because of the geology, earthquakes are felt for much longer distances here in the Midwest. Supposedly the New Madrid quakes of 1811-12 were felt as far away as the east coast. At the time, the area was sparsely settled, but St. Louis and Memphis with all of their old brick buildings could be devastated if the fault let go now.

[FroggyTheGremlim]

Little concerned about the corner between PA, Ohio and the WV panhandle. Not too far from me here in Pittsburgh.

[politicianslie]

One day someone will explain how California drops into the ocean from a massive earthquake on a transform fault. Until then-people will just remain ignorant.

Americans are far dumber than that. It is being reported that some people still believe that the country should have been shut down for the CORONA virus silliness.

You can fool SOME OF THE PEOPLE ALL OF THE TIME. Even President Trump fell for some of Fauxi's BS.