Overview over the contents of this folder: 3mHz.pdf (680 kB): A publication by Zürn and Wielandt presenting a physical explanation for the minimum of vertical seismic noise near 3 mHz. NonplaneWaves_Summary.doc (26 kB). Summary of the publication on nonplane waves, with a link to the scan of the full text. NonplaneWaves.pdf (700 kB): A scan of the publication "Propagation and structural interpretatioin of nonplane waves", 1993. This paper investigates the relationship between two conceptually different notions of phase velocity, namely the "structural" phase-velocity parameter in the wave equation and the "dynamic" phase velocity of a wave. SurfaceWaves_Summary.doc. Summary of a note on seismic surface waves over 3-d structures, with a link to the postscript version of the full text. surface-waves.ps (1620 kB): A note on the interpretation of seismic surface waves over 3-d structures, by Friederich, Hunzinger and Wielandt. A numerical experiment exploring the difference between "structural" and "dynamic" phase velocities. volumesource1.dvi (23 kB), volumesource1.ps (130 kB): Basics of the volume-source model and its application in volcano seismology. Explains the nontrivial but simple relationship between the time-dependent volume of an expansive source and the seismic signal. Manuscript of a workshop presentation (Santorin, 1999) Volumesource2.dvi (27 kB), Volumesource2.ps (130 kB): A theoretical discussion of the relationship between seismic moment and source volume. What does the isotropic part of the moment tensor really say about the physical source? Not what most seismologists believe. Unpublished manuscript, 13 pages.