Seismic traveltime has a broad application in seismic exploration methods, including migration,
demigration, tomography, and forward modeling (Wang et al., 2018; Sun et al., 2017; Wan, Wei & Wu, 2017; Yang & Zhu, 2017; Wang, Li & Chen, 2017; Yang et al., 2018; Huang & Sun, 2018; Wang et al., 2016; Sun et al, 2018).
Even though the users access the migrated files regularly across a wide area network (WAN), there has only been a slight delay added to the normal access time for
demigration, which usually averages at about five to 10 seconds.