nseu
It looks to me at first take as if in that photo they had had all 4 engines flame out!
The actual EPR is 0.75 which is waayyy below idle EPR of about 1.02 or so. The green line towards the top of the EPR scale is the 'reference EPR' which is also displayed in green numerically on top of the scales as 1.48.
The N1 and EGT values are however consistent with an idle descent, so I would suspect as an alternative that the EPR gauges have all failed for some reason.
Sorry that's the best I can do having been up all night looking at the bl00dy things without seeing the lower screen with the secondary engines instruments and any EICAS messages!