Exotic Seismic Sources: Nearly Identically Repeating Events and Non-Double-Couple Earthquakes

earthquakes and nearly identically repeating events. Using non-double-couple earthquakes, I aim to better understand the connection between earthquake production and geothermal/magmatic systems. I focus on a 100-km-wide circular area centered at the Long Valley caldera and comprehensively search for events greater than M3.5 since 1993 with significant coseismic volume changes. Using three-component broadband digital waveforms at regional distances, I solve for four different source models: DC, deviatoric (DC+CLVD), DC+isotropic, and full moment tensor (DC+CLVD+isotropic). Using the F test as a statistical aid, the best model is determined for each event. I then conduct stability tests to determine the robustness of 2 the focal mechanism solutions and isotropic components. The results show that fluid-influenced earthquakes in the magnitude range studied are quite rare in the Long Valley volcanic region. Of 33 high quality events, 28 are best characterized by a simple DC source model, four by a DC+isotropic source model, and one by a full moment tensor model