I would like to ask about the reverse slip direction to be used in the interseismic simulation. In the example 3d subduction step03.cfg, the reverse slip sign for the slabbot is (-). It indicates the fault of slabbot is subducting downward. This also makes sense according to figure 6.2. But why the sign for slabtop in creep spatial database is (+). Depth less than 60km is 0 means locking. But why the reverse slip is (+) but not (-).
Thank you in advance.
Alvina K K