The 2022 EPS Excellent Paper Award is granted to the paper by Takuto Maeda, Shunsuke Takemura and Takashi Furumura (2017).

Technical innovation has been a critical ingredient in promoting geophysical research. Maeda et al. (2017) released an open-source software package, Open-source Seismic Wave Propagation Code (OpenSWPC), for seismic wave propagation in 3D and 2D viscoelastic media based on the finite difference method from local to regional scales. The code allows any user including non-experts to conduct seismic wave propagation simulations efficiently. Users can specify arbitrary velocity structure models and various source representations. All the necessary information for the simulations is defined in input text parameter files. The output waveforms can be directly compared with observed seismograms. Due to its user-friendliness, the code has been applied to a wide variety of seismological studies, including heterogeneous structures of the Earth and earthquake source physics. Therefore, this paper significantly contributes to developing the seismological research community and is worthy of the 2022 EPS Excellent Paper Award.