Visualizing Global Seismic Phases with AlpArray

Seismic wave propagation is intrinsically a process in time and space. Although seismometers make point measurements only, dense, large-aperture seismic networks allow the full observation and analysis of wave propagation. We present a new visual representation of teleseismic phases by combining time-dependent ground-motion visualizations with array analyses to connect the time-domain motion with phase information retrieved from the frequency-wavenumber (f -k) domain. This serves as an educational tool, but also for efficient identification of off-angle arrivals, dispersion, and anomalous seismic phases. The processing is applied to events with M-w >= 7 observed at the AlpArray Seismic Network in Europe and two example teleseismic events are discussed in detail.