I'm not a geologist, but this was pretty deep (44.1k) so not likely a foreshock right? Any actual geologists have a thought here? I know we have seen some indications that foreshocks can happen before megathrust earthquakes but it would need to be at the interface right? This looks like it is just the subducted slab deep down which in the 'intermediate zone' so not impacting the interface that 'slips' in a megathrust earthquake. (again, not a geologist) Now there have been, by that I mean just now, a 6.6 aftershock that was only 10km deep so that is potentially more concerning?