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Questions tagged [earthquake]

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Why do period and damping ratio affect acceleration?

In the table above, the period of the structure $(T)$, the acceleration coefficient on the structure ($g$ in terms of gravitational acceleration) $Sa(T)$, The damping ratio is expressed as $ζ$ . As ...
Bilgehan Yılmaz's user avatar
3 votes
2 answers
510 views

Can the Dzhanibekov Effect celestial bodies, like Earth’s crust and/or core causing the flipping of magnetic poles?

“The tennis racket theorem or intermediate axis theorem, is a kinetic phenomenon of classical mechanics which describes the movement of a rigid body with three distinct principal moments of inertia. ...
Digcoal's user avatar
  • 151
1 vote
3 answers
169 views
+250

How much does quantum uncertainty contribute to the uncertainty of earthquakes?

More abstractly, the topic is: amplification of quantum uncertainty within dynamically unstable systems. I'd like to have a calculable toy model, e.g. maybe a quantum version of the famous "...
Mitchell Porter's user avatar
0 votes
0 answers
15 views

Converting starting wave to known max wave height

in our university project, we are developing a tsunami simulation using the Shallow Water Equations. For our project, we have decided to allow users to enter an epicentre and the magnitude of an ...
TheBest_Kappa's user avatar
3 votes
1 answer
234 views

What makes a book (or a stack of paper) so sturdy under pressure?

I've watched an experiment where they compress a book with a hydraulic press, and the book appears to stay relatively intact under that pressure. It is mentioned that the hydraulic press has a 100-ton ...
ermanen's user avatar
  • 175
1 vote
0 answers
15 views

Time scale of earthquake simulations on scaled building models

The effect of earthquakes on a building can be investigated by creating a scaled down model of the building, and simulate an earthquake on a shake table. A recording of a natural earthquake can be ...
Volker Siegel's user avatar
6 votes
2 answers
2k views

Possible non-negligible physical effects that relate planetary/lunar geometry and seismic activity such as earthquakes?

Could any forces from the moon, the planets or the sun in orbit hypothetically influence seismic events on earth? And if yes how to approximately calculate and compare the magnitude of the forces? ...
Hjan's user avatar
  • 171
0 votes
2 answers
460 views

Are seismic waves and shock waves same?

Are shock waves (those produced by high speed jets) and seismic waves (produced during earthquake) the same? In many places I have seen seismic waves referred to as shock waves. So are these two same?
rooni's user avatar
  • 101
2 votes
0 answers
49 views

How do earthquakes of different strengths affect buildings of different heights?

Why is it that short buildings respond more to high frequency oscillations while tall buildings respond more to low frequency oscillations? I would assume that how they react is related to the natural ...
Monopole's user avatar
  • 3,464
0 votes
2 answers
112 views

Understanding Snells Law in seismic waves

This is a homework question, Ill say it upfront. The Problem is given so: Earthquake causes a wave that meets a boundary between two rock substances. Incoming wave speed is 25 m/s and angle is 9 ...
Jeekim's user avatar
  • 103
1 vote
2 answers
48 views

Is the brick-concrete connection the 'weakest link' in brick made buildings?

When an earthquake strikes,do buildings made of bricks and concrete break mostly on concrete-brick connection spots?If Yes does the brick on the picture prevents this from occuring?
Janko Bradvica's user avatar
1 vote
3 answers
269 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 ...
dogman's user avatar
  • 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 ...
joshperry's user avatar
  • 317
-1 votes
1 answer
44 views

Energy consumption [closed]

If the yearly worldwide energy consumption is 80,000 TWh, and a particular earthquake generates 1.6x10^13 Joules of energy. If we could harness all of the energy from the earthquake, for how long ...
Anthony Macks's user avatar
2 votes
1 answer
338 views

What is the magnitude of a super-nova on the Richter scale?

What is the richter scale of a super-nova? If one could measure compare it to standard earthquakes measured in logarithmic richter scale, what would be the value for a super-nova?
Asaf Ravid's user avatar
1 vote
0 answers
47 views

Better to stay in the open or in the water during an earthquake?

I tried looking around on google but couldn't really find any good information. For arguments sake, say I am in a field with a river intersecting it. If an earthquake occurs and I am near the ...
SamCyanide's user avatar
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?
Awesome boy's user avatar
4 votes
0 answers
58 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 ...
spraff's user avatar
  • 5,148
2 votes
2 answers
254 views

Distinguishing an underground Hydrogen bomb test from a fission bomb explosion

A related question is Hydrogen bomb radiation output, but my question is based on the seismograph data (or any other data) possibly producing a distinctive pattern. Is it possible to tell the ...
user avatar
1 vote
0 answers
34 views

Is it possible to obtain the richter grade of an earthquake with the data of an accelerometer?

I have an accelerometer on a table that gives me the $x$, $y$, and $z$ axis acceleration in $m/s^2$ when I move the table. Is there a formula or method to pass this data to a earthquake grade in a ...
Total's user avatar
  • 11
2 votes
1 answer
735 views

Question about the difference between a tsunami caused by a meteorite and one caused by an under water earthquake

Picture the situation where a meteorite falls somewhere on one of our oceans and gives off all its kinetic energy to the water (let's ignore the thermal energies involved like, for example, the heat ...
Deschele Schilder's user avatar
1 vote
1 answer
1k views

Accelerometer offset

First off, if this isn't the proper stack for this, I apologize, but since my question isn't based around code, I think this is the proper place. I am making a system based around a 3 DOF ...
Kyle Hunter's user avatar
2 votes
1 answer
175 views

Distortion of interference pattern at LIGO

Does the vibration due to the earthquakes distort the interference pattern of LIGO's interferometer?
Anil Kamat's user avatar
14 votes
2 answers
3k views

The LIGO Gravitational Wave Detection: have deep-mantle earthquakes been ruled out? [duplicate]

Everywhere I've looked so far that talks about the possibility the LIGO detection was an earthquake, involves being ruled out due to the large distance between the two LIGO sites. Two identical ...
Lucy Meadow's user avatar
0 votes
4 answers
405 views

Could LIGO discovery be due to e.g. earthquakes or have a terrestrial source? [duplicate]

I mean, could it have been earthquakes or anything else?
Sidarth's user avatar
  • 997
-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?
spartancg175's user avatar
0 votes
0 answers
65 views

About EarthQuake?

As you know in Nepal many aftershocks are coming and earthquake is related to physics as earthquake is also a longitudinal waves . I have some series of question as well as my thoughts about it? Here ...
Shirshak55's user avatar
0 votes
2 answers
114 views

It's All About Earthquake! [closed]

All the following informations i've got are from a book.(i want to check that whether the informations are correct or not,that book isnt a science book though) There is a limit to which earth can ...
tahsin's user avatar
  • 71
-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 ...
Nederealm's user avatar
  • 135
1 vote
1 answer
2k views

How does a longer wavelength penetrate deeper with Rayleigh waves?

I'm struggling slightly to understand this idea. I've slowly been building up an explanation, so at this stage it might be just some confirmation I'm looking for, but also some guidance if I'm off ...
user1707828's user avatar
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 ...
JAS's user avatar
  • 105
2 votes
2 answers
138 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 ...
Quora Feans's user avatar
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 ...
TimJ.'s user avatar
  • 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 ...
Mark Rovetta's user avatar
  • 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 ...
Cleonis's user avatar
  • 21.4k
4 votes
1 answer
2k views

How to convert Richter magnitude scale to approximate TNT?

I know the Richter magnitude scale is often used for measuring the strength of earthquakes. At the same time, explosive/destructive releases of energy are often quoted in equivalent amounts of TNT. Is ...
hatava's user avatar
  • 41
6 votes
3 answers
3k views

How does one explain this pattern generated by earthquake waving driving a pendulum?

How to explain this pattern generated by earthquake wave driving a pendulum? Specially, there are three groups of curves that look categorically different: 1) The group of curves outside the olive-...
qazwsx's user avatar
  • 989
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 ...
lurscher's user avatar
  • 14.5k
3 votes
0 answers
261 views

Jerk Magnitudes and Earthquakes

Destruction from earthquakes depends on many factors, including magnitude, occurrence depth and closeness to epicenter. One measure that may relate destructive force for buildings and infrastructure ...
Michael Luciuk's user avatar
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 ...
Emanuele Luzio's user avatar