Vancouver sits on a backarc basin ith volcanoes in the garibaldi range behind it.

Highest compression magnitude covers the length of the segmentin the forearc with the volcanoes @ the edges. being a backarc the segments are well spaced out, hence highers between richter (8.2) and (8.4).

Transform events between segments will match those on other island arcs & backarcs which compress faster & have a more complete cyle of recompression. They reach up to richter (7.7)in places such as Tonga.

The culminating rebound event is a fundamental feature of the size of the backarc basin which in this case goes right back to the range in the interior rockies separating the plains controlled by spreading from the Chilcotin hotspot @ Wells Grey-Clearwater. Moment for r/lx when the backarc rebounds & spreads is anywhere from moment [8.8]for a single segment extending back to the volcanoes through to [9.7] for the entire backarc basin right back to the hotspot. The controlling hotspot has also in the past produced r/lx covering the entire basin from the hotspot & through Cscadia to Nor Cal.

Add your own moment figure in the [] for that one.

The good news is that the recompression history of the backarc is currently in early days.

Have a nice day: Ag