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malcolmw / pykonal

Travel-time calculator based on the fast-marching method solution to the Eikonal equation.
https://malcolmw.github.io/pykonal-docs/
GNU General Public License v3.0
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Can conversion wave and teleseismic wave arrival time be calculated? #10

Closed gongchang96 closed 3 years ago

gongchang96 commented 4 years ago

Can conversion wave and teleseismic wave arrival time be calculated? thx

malcolmw commented 4 years ago

Hi, @gongchang96,

Yes, traveltimes can be computer for both converted and teleseismic waves, although this does take a little extra work for the user. The details on the best way to do this depend on the particular application.

What are you trying to do?

Thanks, Malcolm

gongchang96 commented 4 years ago

hi, I want to computer the delay time for receiver functions in a local 3D model. how should I do?

thanks chang

malcolmw commented 4 years ago

Hi, @gongchang96,

Take a look at the attached notebook. It demonstrates how to compute travel times in a local 3D model for plane waves entering the local model from below.

Let me know if that helps you achieve your goal.

moho_conversion.zip

gongchang96 commented 4 years ago

Thanks for providing me notebook. It make me clearly understand how to compute using pykonal.

And if I would compute the travel time for Ppds or Ppss, can you give me some suggestions？

malcolmw commented 4 years ago

@gongchang96 I am unfamiliar with these phases, can you explain them to me so I can help you?

- Malcolm

gongchang96 commented 4 years ago

Maybe I didn't make it clear. I mean the Ppds or Ppss is the phases in receiver function. It is the teleseismic wave reflected downward by the free surface of the Earth as a P-wave or S-wave, and then reflected upward by the discontinuity as an S-wave. Because FMM is hard to compute the travel time for the reflected wave. So if you have any suggestions about it?

malcolmw commented 4 years ago

@gongchang96 OK, take a look at the attached notebook. It demonstrates how to trace rays and compute delay times for multiply reflected/converted phases in a 2D cartesian model.

Let me know how it goes, Malcolm

moho_conversion.zip

malcolmw commented 4 years ago

Any success with the above notebook, @gongchang96?

gongchang96 commented 3 years ago

@malcolmw Sorry, I just came back from a trip, I will test it with actual data in these two days.

malcolmw commented 3 years ago

@gongchang96, no problem.

Let me know how it goes, Malcolm

malcolmw commented 3 years ago

Closing this as inactive. Please feel free to reopen if you come back to this, @gongchang96.