# Questions tagged [mathematics]

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1 vote
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### What is the relationship between earthquake risk, magnitude, and distance from the epicenter?

I need a (rough) functional relationship between these three quantities. My initial hypothesis is that the risk $R$ (intended as the probability of a building damage), scales with the square root of ...
• 111
117 views

### How to produce random numbers from seismic data?

I have read that the University of Chile uses seismic data to produce random numbers. (https://random.uchile.cl/randomness-beacon). Does seismic data real have randomness and if it so, which ...
• 163
150 views

### How or where to find out how many percent of the Earth's surface is above/below a certain altitude?

I wonder whether there's a way of learning how much of the Earth's surface is above or below a certain altitude (land on air only, i.e. excluding seas and oceans and land underwater). E.g. the lowest/...
• 175
44 views

### Mathematically speaking, why can we use Fourier Transform when studying wind? [closed]

As far as I understand, wind is stochastic on small scale. Then wouldn't that mean, since the function is not Riemann integrable, Fourier Transform cannot be used? What is the reason that climate ...
• 31
1 vote
48 views

### Describe changes in atmosphere data - mathematical solutions

I interpolated isotopic data (2H or 18O) from 1970 and plotted it on a map. I did the same with data from 2010. The interpolated data are gridded data which have changed over time. Up to now I have ...
• 1,949
1 vote
55 views

### Can we know if a numerical model will converge or not according to the boundary conditions?

Consider a square 2D domain and a steady-state simulation. According to the geology of the domain, the North, South, West and East limits must be conditions of zero flow (Neumann). The aquifer ...
• 145
1 vote
68 views

### Recommend books on Lat Long

I am a lyaman of Geography, and working on a project to calcuate x,y (from a rectangle coordinate system) to Lat,Long I searched on the net, and fell complete lost in the big world of geometry, ...
• 11
1 vote
59 views

### What are the boundary conditions for Navier's Equations of motion in seismic?

Navier's equations of motion in seismic have 3 solutions, according to how it is resolved (boundary conditions): for Vp (compression waves) for Vs (shear waves) for Vr (Rayleigh waves) I know the ...
• 111
1 vote
44 views

### How to calculate relative humidity with temperature and dew point? [duplicate]

I got this formula for calculating- 100x(EXP.((17.625x32)/(243.04+32)/EXP.((17.625x54)/(243.04+54)))=? The answer should be 43, but I Keep getting 65. Please, can anyone calculate this correctly? ...
• 11
148 views

### Is There a Correlation Between Earthquake Magnitude and the Deformation Observed in the Rock?

I've been doing a little geology research. One of the topics that I noticed was the existence of "deformations" that appear in the rock layers if an earthquake has occurred. Smaller ...
36 views

• 185
471 views

### regression map vs correlation map

What is the exact difference between regression and correlation maps? I know that they are often used in climate science but which is the difference in the information they provide? Here an example I ...
• 529
3k views

### How do I convert kg·kg⁻¹ to ppbV (parts per billion volume)?

I am using the CAMS model output data to figure out the ground level ozone at a particular place. It is given in mass mixing ratio, and I want to convert to parts per billion volume mixing ratio (...
1 vote
168 views

### how much entropy is there in the shape of a rock?

If I dig up a given rock, make a 3d model of it, and compare that model with those of a large number of other rocks from the same area, what fraction of other rocks would have the same 3d model? Let'...
• 113
894 views

### Applications of differential/integral calculus in crystallography (teaching undergraduates)?

I'm a mathematics professor who is seeking to find interesting, application-driven ways of teaching freshmen college students differential/integral calculus. I am in no way versed in crystallography ...
237 views

### What makes up a gradient [closed]

My question is a two part question. First I currently know of two different gradients.I think there is more; however, I don't completely understand what makes a gradient. So, here is my questions. ...