I've looked at 3 earthquakes and how the SEi signals changed for each.

• The 3 earthquakes are the same ones I evaluated in alog 38143
• Of the 3 earthquakes, the first earthquake, in January 2017, changed the pointing at 4km the most, with the rotations adding up to a 5.5mm change at 4km for ETMX and a 13.6mm change at 4km for ETMY
• While this says nothing of the jolt that the SEI system got during the Montana EQ, it does show that H1 can relock with measurable changes in pointing