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Hidden earthquake risk found lurking beneath Los Angeles
National Geographic ^ | 08/30/2019 | Maya Wei-

Posted on 08/31/2019 1:55:25 PM PDT by BenLurkin

The Wilmington fault...is an elusive type of fracture. Unlike many faults, which crack Earth’s surface like an egg, the Wilmington fault is “blind,” which means it’s concealed beneath the surface, making it especially difficult to study. So while scientists have long known the fault is present—stretching 12.4 miles under southern Los Angeles into San Pedro Bay—it was presumed to have sat quiet for millions of years.

While the fault is slow moving and likely ruptures only once every 3,200 to 4,700 years, it underlies two of the United States’ busiest ports. And researchers worry that the Wilmington could link with other nearby faults to produce a temblor as strong as a magnitude 7.4.

From their analysis, the team estimates the Wilmington fault has moved an average of just 0.16 millimeters per year over the last 500,000 years, and it likely hosts an earthquake every few thousand years. For comparison, the San Andreas fault is estimated to move 30 to 50 millimeters each year, with an average time between earthquakes of around 150 years.

That is, while it’s slow moving, it shouldn’t be ignored. For one, there’s the type of motion thrust faults produce, which is more of a vertical shove than the horizontal back and forth of a strike-slip fault, Wolfe says. Buildings can sway a little, but the up-down motions can be devastating. Such intense impacts were seen during the magnitude 6.7 Northridge earthquake that rattled from a blind-thrust fault in 1994, killing more than 60 people and injuring thousands.

The Wilmington fault is also located directly below two important ports and other infrastructure, Shaw notes. And a disruption of operations could have major impacts. While more work is necessary to further tease apart the Wilmington’s earthquake potential, the latest study emphasizes the import of studying slow-moving blind faults.

(Excerpt) Read more at nationalgeographic.com ...


TOPICS: Science
KEYWORDS: blindthrustfault; earthquake; fault; losangeles; wilmington; wilmingtonfault
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To: DesertRhino

If the won’t drill the oil it will come out of the ground by itself!


21 posted on 08/31/2019 4:08:01 PM PDT by cgbg (Democracy dies in darkness when Bezos bans books.)
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To: null and void

Helen Keller saw it.


22 posted on 08/31/2019 4:14:11 PM PDT by dynachrome (Build the wall, deport them all. And send her back!)
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To: BenLurkin
IMHO, the headline, "Hidden earthquake risk found lurking beneath Los Angeles" is a bit over the top. The headline would have us to believe this is a newly discovered earthquake and that it is ominous. A little ways into the article, it says this:Turns out they've know about this fault for some time and it isn't ominous (lurking) after all.

Modern journalism sucks.

23 posted on 08/31/2019 4:30:17 PM PDT by upchuck (If democrats would stop shooting people gun violence would drop by 90% ~ h/t Mr K.)
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To: BenLurkin

Forget the ports, movie studios, and Hollywood elite who try to rule us, it is the lives of 12 million migrant invaders and the 2020 votes they represent that is important to consider.....


24 posted on 08/31/2019 4:31:04 PM PDT by SuperLuminal (Where is Sam Adams now that we desperately need him)
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To: BenLurkin

But maybe it doesn’t identify as a fault. All of this undeserved microaggression regarding it’s hidden feelings could be a trigger. Isn’t that how the new science works?


25 posted on 08/31/2019 4:38:52 PM PDT by bluejean (I'm becoming a cranky old person. It really annoys me.)
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To: BenLurkin
...fault has moved an average of just 0.16 millimeters per year over the last 500,000 years,...

Can someone throw some light on the kind of technology and instruments available that can make such measurements possible?

26 posted on 08/31/2019 4:39:29 PM PDT by mikeIII
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To: BenLurkin
"...researchers worry that the Wilmington could link with other nearby faults to produce a temblor as strong as a magnitude 7.4.

I found one of the "researchers" doing the "worrying." She is so worried she can't get any sleep. None at all.


27 posted on 08/31/2019 4:39:48 PM PDT by ProtectOurFreedom
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To: heshtesh

Earthquakes “erupt”? That I gotta see!!


28 posted on 08/31/2019 4:40:27 PM PDT by ProtectOurFreedom
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To: mikeIII

29 posted on 08/31/2019 4:50:44 PM PDT by BenLurkin (The above is not a statement of fact. It is either opinion or satire. Or both.)
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To: BenLurkin

I’d be looking for Weena.


30 posted on 08/31/2019 7:17:28 PM PDT by DIRTYSECRET (urope. Why do they put up with this.)
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To: null and void

It’s what they call a blind fault.
They may call it a blind fault, but I just don’t see it...
...
Don’t worry, it’s not your fault.


31 posted on 08/31/2019 9:15:41 PM PDT by Pocketdoor
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To: null and void

I have No Fault insurance for that.


32 posted on 08/31/2019 9:25:01 PM PDT by Lurkina.n.Learnin (If you want a definition of "bullying" just watch the Democrats in the Senate)
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To: BenLurkin

National Geographic is kind of slow to pick up on things, it seems.


33 posted on 09/01/2019 7:09:29 AM PDT by GingisK
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To: GingisK

Doesn’t it boil do to mean WE NEED MORE FUNDING TO STUDY THE PROBLEM?


34 posted on 09/01/2019 7:26:56 AM PDT by oldasrocks (Heavily Medicated for your Protection.)
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To: BenLurkin

Something else no one can do anything about but the reporters hope millions will start losing sleep over.


35 posted on 09/01/2019 8:18:53 AM PDT by Wuli
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