Hi, The KMV discretized elastic wave solver seems to be doing something weird. I am essentially prescribing a sinusoidal impulse as displacement at a circumferential section for a short duration (150 microseconds). I have attached snapshots at 200 microseconds and 600 microseconds. Instead to the pulse traveling at group velocity, some random error is increasing near the loading section. I am not able to figure out what could be the problem. I have tried out different preconditioners while maintaining a direct "preonly" KSP iterations. Do you have any idea where I could be going wrong? -- Abhishek Venketeswaran NETL Research Associate - ORISE National Energy Technology Laboratory Department of Energy abhishek.venketeswaran@netl.doe.gov Work: 412-386-4833 Mobile: 716-507-7890 www.netl.doe.gov<http://www.netl.doe.gov> [cid:5c03a053-94d0-49c7-84af-375ffa90acbb]