All Questions
Tagged with earthquake geophysics
13
questions
1
vote
3
answers
270
views
Finding a single component of a strain tensor ($E_{yy}$) knowing $E_{xx}$ and $E_{yx}$
I know $E_{xx}$, $E_{yx}$, and $E_{xy}$ but I can't figure out how to find the value for $E_{yy}$. I think it has something to do with the phrase 'homogenous $2D$ strain' as a big hint since there's ...
- 13
1
vote
3
answers
87
views
Is there a subterranean SOFAR channel?
After discovering the SOFAR channel in water at a depth which the speed of sound is at its minimum and acts as a waveguide, it was postulated that a similar channel existed in the atmosphere and ...
- 317
0
votes
1
answer
150
views
What is below a tectonic plate?
I know that tectonic plates float on mantle but when two plates move away from each other, is the mantle below them exposed to the surface?
- 592
4
votes
0
answers
59
views
Does mankind possess the technology to intentionally trigger a Yellowstone eruption? [closed]
The Yellowstone Caldera eruption will probably be an Extinction Level Event when it eventually happens.
Suppose some lunatic wanted to set it off now, with drills, bombs, or whatnot. Say this lunatic ...
- 5,148
-1
votes
1
answer
155
views
Why don't p-type seismic waves propagate along straight lines in the lower mantle?
Can you tell me why seismic waves (p-type shock wave) passing through the earth's lower mantle don't propagate along straight lines in particular?
-1
votes
1
answer
474
views
What happens if the Russians decide to nuke the Kola borehole?
I recently came across research on the Kola Superdeep Borehole in Russia. It's one of the world's deepest at 12 km (7.5 mi) down. If someone decided to hoist a nuclear weapon all the way down and set ...
- 135
2
votes
0
answers
170
views
Richter scale equation
According to Wikipedia, the equation for finding magnitude according to the Richter scale is $M_\mathrm{L} = \log_{10} A - \log_{10} A_0(\delta)$.
However, it is rather ambiguous as to the effect of ...
- 105
2
votes
2
answers
139
views
Frequency of earthquakes
Are earthquakes getting less frequent across the centuries? I know that more seismic stations have register more earthquakes in the last century, but that doesn't imply there were more. I am ...
- 398
2
votes
1
answer
86
views
Potential collapse during an earthquake? [closed]
I was asked to determine the shear forces on 12" diameter table legs supporting a few hundred pounds of static weight.
How does one calculate or determine the potential force on the legs and/or ...
- 29
3
votes
2
answers
327
views
What made the 2011 Tohoku-Oki earthquake?
The Ocean Drilling Program recently published results indicating that the 2011 Tohoku-Oki earthquake produced a maximum co-seismic slip of more than 50 meters near the Japan Trench. This is the ...
- 3,905
1
vote
1
answer
150
views
Energy conversions, on terrestrial scale, before and during a massive Earthquake
Ethan Siegel is an astrophysicist who is now making a living as science blogger.
There is a post titled: Where does an Earthquake's energy come from?
Ethan Siegel points out that massive earthquake ...
- 21.4k
7
votes
2
answers
3k
views
Plate tectonics and water
In a couple of places already i've read the following assertion:
It is believed that plate tectonics might play an important part in
maintaining the presence of water on a planet's surface
one ...
- 14.5k
5
votes
1
answer
1k
views
Upper limit on the earthquake magnitude
From the Gutenberg-Richter law we know that the frequency of an earthquake is a power law, so virtually any magnitude is possible on earthquake event. But the earth has a finite size so there must be ...
- 836