Seems that the 2025 event re-ruptured the 1952 area (aftershocks + finite fault). The 2025 didn't rupture across the possible segment boundary; rather, it nucleated near the segment boundary (so did all the foreshocks).
pku-geophysics-source.group/htmls/202507...

Quickly plot the rough location of the 2025 Mw8.8 Kamchatka earthquake (USGS hypocenter) on Figure 1 in Pinegina et al. (2018). I wonder if the 2025 event re-rupture the northern rupture of the 1952 Mw9.0 event? Also, did the 2025 event rupture across the "segment boundary" at ~N53?

rdcu.be/eyrre

Walk and think around the campus until I see this.

Made a meme to introduce myself to the new group.

I joined the McGill field school at Rainbow basin today, (thanks Christie @keepitrheol.bsky.social!). I was nervous before I arrived, but quickly felt relaxed with the group. A undergrad surprised me with the question “what is geophysics?”. I couldn’t answer. I haven’t thought about it for a while.

You are welcome. I’ve been there. I usually vaguely say “stress will accumulate on the fault; once it overcomes the static friction, fault will slip, releasing the energy stored in the surrounding rocks.” It usually works well when you had a physical elastic rebound demonstration machine.