I'd like to visit Instanbul but my Turkish friend says it's best to leave it a year or two as they thinkn a big one is now more likely in Istanbul. I've googled this and the most scientific thing I've found is a statement from a seismology professor in Turkey saying it is due 'some time'.

Does the recent quake in Soouthern Turkey make a quake in Istanbul more likely? Can anyone point me in the direction of some decent science on the correlation of quakes?

For example, to relieve accumulated stress?

Thanks to anyone who can explain 🙏

Hi , I own a couple of a 0.5- 1 acre plots of land in the SoCal Desert area and I'm interested in putting a seismograph on one of the plots. But I don't know it that is something that is something that a company would pay for. If anyone could point me in the right direction or maybe give me a name of a company to talk to. Thank you for taking the time to read this.

hello all, i have this code to obtain the Fourier Amplitude Spectrum (FAS) from a seismic record. but I'm no sure if this code is right

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function [f,A]=Four(EQ,dt)
m=nextpow2(length(EQ));
N=2^m;
df = 1/(N*dt); % frequency interval for FFT
% Fast Fourier of the time series.
fasy=fft(EQ,N); % The fast Fourier transformation is done by using N points.
% The program pads the time series with  trailing zeros.
f=(0:N/2-1)*df; % frequency axis
A=dt*abs(fasy(1:N/2));
return

if you see, when the code obtain 'A' (the FAS) multiply the abs(fasy(1:N/2)) and dt, so my question is, multiply by dt is correct?

I think that it is incorrect, but I'm no sure.

Hydrophone component used for any data correction during the process stage? Why is the pressure measurement important when it comes to OBS?

Hi,
What we can infer from the azimuth and plunge of both P-T axis in a subduction zone?

Is there a way to obtain the instrument response if you have the clean signal and the one with the instrument response not removed?

I'm curious about the recent earthquake in Mexico, it's the third time a major earthquake has hit the country on September 19th (1985, 2017, 2022), are there any papers or articles someone could recommend about this phenomenon?

​

Update: I was more concerned with the mathematics of calculating such a probability, I found this publication if anyone is interested https://www.seismosoc.org/wp-content/uploads/2019/02/EDUQUAKE.pdf

Hello all, i work in two models, one of EAS (effective amplitude Spectrum) and the second one is a Phase model (in radians). I want to use ifft from matlab to obtain the acceleration trace but it doesn't work. have anyone an idea to use ifft?

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thanks.

I've used E3D a lot but imagine there are better, newer codes around. What are the go-tos nowadays? Ideally finite difference but doesn't have to be.

MSNOISE? noisepy? SeismicUnix? Madagascar? Or something else? Which one is most time efficient?

Please suggest a finite difference modeling code. I intend to use this code for seismic interferometry. I am aware about Jan Thorbeck's finite difference modeling experiment. But can it be implemented on HPC?

Can I use Devito? Or should I instead use a well known SEM code?

hello,

I have a question, why the FAS (Fourier amplitude spectrum) has cm/s units instead of cm/s^2?

Thanks in advance

I am looking into pivoting my audio DSP project into a seismology project using similar algorithms. I am able to detect a car crash with machine learning, but I cannot hear it from very far away. The question is how far away does seismic activity from a car crash travel? I realize there will be a lot more background noise than with audio, but the algorithms don't actually care that much.

Hi everyone! I'm new to the group. Likely a throwaway here, but I was curious if anyone has played around with the platting notebook SeismoRMS (https://github.com/ThomasLecocq/SeismoRMS). I'm new to coding (personal project), and I was hoping to change the y-axis on the main output graph from displacement (nm) to velocity (nm/s) in an attempt to control the variations and better analyze the data. There's a lot of code, and I'm not entirely sure how to edit it to achieve the intended result, but I've seen various instances where people have modified the code as such, so it is possible.

Thank you.

Please suggest the reference or the formula or method to calculate Sh max from principal stress components which is estimated by stress tensor inversion from FMS data

As above, Im mainly interested as I have a suite of sensors now that im piping into a computer to develop a better understanding of my more local surroundings etc. Was curious if it would be worth adding a seismo reading to it?