Refactor code structure for improved readability and maintainability

Author: pawbz

src/_data/sidebar.jl

@@ -7,5 +7,6 @@
     "raytheory" => "Ray Theory",
     "misc" => "Miscellaneous",
     "imaging" => "Imaging",
+    "normalmodes" => "Normal Modes",
     "eqdata" => "Earthquake Data",
 ]

src/assets/tikz/tikz.jl

@@ -1,5 +1,5 @@
 ### A Pluto.jl notebook ###
-# v0.19.41
+# v0.20.8
 
 using Markdown
 using InteractiveUtils
@@ -215,7 +215,7 @@ pics/crust/.style n args={6}{
   """
 
 # ╔═╡ 7035d9ef-d399-4339-a243-68d4a45bb425
-plot(code; width="", options=raw"") = TikzPicture(code, options=tikz_default_options * options, preamble=tikz_preamble, width=width)
+plot(code; width="", preamble=raw"", options=raw"") = TikzPicture(code, options=tikz_default_options * options, preamble=tikz_preamble * preamble, width=width)
 
 # ╔═╡ 5150711d-5c7d-4788-86d8-848cb072532b
 tikz_default_options * raw"""scale=2"""

src/classes.md

@@ -12,23 +12,41 @@ main a img {
 }
 </style>
 
-
-0. History of seismology
-
-# Wave Theory
-
-1. Harmonic oscillator
-2. Waves on a string
-3. Stress and strain
-4. Equation of motion and constitutive equations
-5. Boundary conditions
-6. Planewaves
-7. Lame's theorem; P and S waves
-8. P-SV and SH decomposition
-9. Rayleigh & Love waves; dispersion
-10. Normal models of the Earth
-11. Intrinsic attenuation
-12. Seismic anisotropy
-13. Born approximation and imaging
-14. Seismic interferometry
-15. Representation theorems
+# Some basics
+- Seismology in historical perspective: its development and significance within Earth Sciences
+- Harmonic oscillator
+- Waves on a string
+- Modes of coupled-oscillator systems
+- Basics of solid mechanics: stress and strain
+- …
+ 
+# Elastic wave equation
+- Seismic equation of motion and constitutive equations
+- Representation theorems in elastodynamics
+- Lame's theorem; P and S waves and their potentials
+- P-SV and SH decomposition
+ 
+# High-frequency approximation
+- Ray theory, tracing, Fermat’s principle
+- Basics of ray tomography
+ 
+# Far-field approximation
+- Planewaves, boundary conditions, and their reflection/transmission
+- Seismic anisotropy
+- Intrinsic attenuation
+ 
+# Surface waves
+- Rayleigh & Love waves and their dispersion
+- Group and phase velocities
+ 
+# Lamb’s problem
+ 
+# Imaging
+- Scattering, Born approximation, and inverse scattering
+- Basics of full waveform inversion
+- Passive seismic imaging and concepts of interferometry
+ 
+# Normal modes of the Earth
+- Eigenfrequencies
+- Spheroidal and Toroidal modes of the Earth
+- Mode splitting