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Started By
Message
Now Closed: Everything you ever wanted to know about EARTHQUAKES
Posted on 8/19/14 at 2:09 pm
Posted on 8/19/14 at 2:09 pm
EARTHQUAKES
Earthquakes happen all the time. Millions per year. And they are powerful:
Real-time Earthquake tracker
If you like Google Earth, you can get a layer
There was one in Oklahoma (just outside Guthrie) today! 4.2 magnitude. Anyone there feel it?
Magnitude? Richter scale! Logarithmic! Next level is 10x stronger than the next. Quantitative measure of the earthquake.
Mercalli Scale is for earthquake intensity, or amount of destruction. A qualitative report of the earthquake.
Human structures are the number one cause of earthquake fatalities. Scondary effects are also deadly and destructive.
Fire from San Francisco 1906 Earthquake
and Tsunamis
But earthquakes are nice because they helped us figure out the interior of the Earth!
And that's all because seismic waves propagate through different materials in different ways!
So, for a limited time, ask me any question you have relating to Earthquakes and their secondary effects!
Why this matters to you:
The gray area is the failed arm of that triple junction (3 different tectonic plates)...and it's where the Mississippi River runs.
The Baton Rouge fault marks where a huge piece of rock is separate from the mroe stable craton of the US.
Earthquakes happen all the time. Millions per year. And they are powerful:
Real-time Earthquake tracker
If you like Google Earth, you can get a layer
There was one in Oklahoma (just outside Guthrie) today! 4.2 magnitude. Anyone there feel it?
Magnitude? Richter scale! Logarithmic! Next level is 10x stronger than the next. Quantitative measure of the earthquake.
Mercalli Scale is for earthquake intensity, or amount of destruction. A qualitative report of the earthquake.
Human structures are the number one cause of earthquake fatalities. Scondary effects are also deadly and destructive.
Fire from San Francisco 1906 Earthquake
and Tsunamis
But earthquakes are nice because they helped us figure out the interior of the Earth!
And that's all because seismic waves propagate through different materials in different ways!
So, for a limited time, ask me any question you have relating to Earthquakes and their secondary effects!
Why this matters to you:
The gray area is the failed arm of that triple junction (3 different tectonic plates)...and it's where the Mississippi River runs.
The Baton Rouge fault marks where a huge piece of rock is separate from the mroe stable craton of the US.
This post was edited on 8/19/14 at 3:29 pm
18
Posted on 8/19/14 at 2:10 pm to Pectus
Thanks
Posted on 8/19/14 at 2:10 pm to Pectus
why don't we have earthquakes in south la?
Posted on 8/19/14 at 2:11 pm to Pectus
When will California float away?
Posted on 8/19/14 at 2:11 pm to Pectus
YESSSS
Posted on 8/19/14 at 2:12 pm to MapGuy
quote:
why don't we have earthquakes in south la?
They dont frack enough
Posted on 8/19/14 at 2:13 pm to MapGuy
quote:
why don't we have earthquakes in south la?
For a couple of reasons. One, stresses are relaxed. Everyone's heard of the New Madrid fault running through the US near Missouri (this is actually related to the formation of the Mississippi River valley...but I digress...until maybe later in the thread). So that fault recently had activity (recent in long arse Earth time). And the stresses are relaxed. Also, the closer fault, Baton Rouge fault has been relaxed because those stresses were removed due to an earthquake, relatively recently.
I'll throw pics up when I can of this.
PICS:
The gray area is the failed arm of that triple junction (3 different tectonic plates)...and it's where the Mississippi River runs.
The Baton Rouge fault marks where a huge piece of rock is separate from the mroe stable craton of the US.
This post was edited on 8/19/14 at 2:22 pm
Posted on 8/19/14 at 2:13 pm to Pectus
Nothing about underground godzillas and you call yourself knowledgeable about earthquakes?
Posted on 8/19/14 at 2:13 pm to MillerMan
how big is the fault line in tennessee.. i remember being in pigeon forge roughly 20 years ago and a small one happend. Had no clue there was even a line there
Posted on 8/19/14 at 2:14 pm to Pectus
quote:
stresses are relaxed
Posted on 8/19/14 at 2:15 pm to Pectus
I feel them almost daily (induced seismicity from a geothermal field). It always comes with a big boom like someone hit the side of the building but there's no extended time period of shaking. Which wave am I feeling?
Posted on 8/19/14 at 2:15 pm to MillerMan
LOLOLOL
Posted on 8/19/14 at 2:15 pm to Pectus
What are the chances that the New Madrid fault causes a major quake in St. Louis or Memphis in the next 100 years?
Does Liquifaction (such as what occured in Japan) occur on all types of soils? What factors have to be present for this to occur? Is it a concern for any major US city in an earthquake zone?
Are there any fault lines in the Gulf of Mexico that could potentially cause problems for the coast of Louisiana?
Does Liquifaction (such as what occured in Japan) occur on all types of soils? What factors have to be present for this to occur? Is it a concern for any major US city in an earthquake zone?
Are there any fault lines in the Gulf of Mexico that could potentially cause problems for the coast of Louisiana?
This post was edited on 8/19/14 at 2:19 pm
Posted on 8/19/14 at 2:16 pm to goldenbadger08
quote:
When will California float away?
You can measure the rate of spread of the San Andreas fault in a picture easily by looking at offset river channels.
And knowing how long the fault has been active. So a few cm/yr * the length of that part of California = how long?
You can figure this out.
But keep in mind, it might spread a meter per large quake!
Posted on 8/19/14 at 2:17 pm to boom roasted
quote:
Nothing about underground godzillas and you call yourself knowledgeable about earthquakes?
KAIJU!
Posted on 8/19/14 at 2:17 pm to Pectus
I like the pictures...although the first one reminded me of a boob. 
Posted on 8/19/14 at 2:17 pm to Pectus
You don't know anything about earthquakes, frick off
Posted on 8/19/14 at 2:18 pm to oleyeller
quote:
how big is the fault line in tennessee.. i remember being in pigeon forge roughly 20 years ago and a small one happend. Had no clue there was even a line there
If you look in the pic I posted of the San Andreas. fault lines can be very very thin. On the order of a meter or ten meters.
It's basically a plane that runs down into the rock. So it technically doesn't have a width at all. What gives it width is all the accessory faults along with it. They more-or-less run the same direction as the fault does.
Posted on 8/19/14 at 2:24 pm to Pectus
When is the New Madrid expected to have its next big quake and what will happen when it does?
TIA Pectus
TIA Pectus
Posted on 8/19/14 at 2:24 pm to Pectus
Do you think the end is near?
Do you think we'll see Armageddon soon?
Do you think we'll see Armageddon soon?
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