I don't think anybody will take this as hard as myself, but I just found out that no accelerometer records survive from the big Japanese earthquake. This is the one that has shut down a nuclear plant forever. They were over-written by subsequent earthquake activity.
Now I will never find out the PGV, which is the most important thing. As well, this pretty well confirms that in-plant accelerometers never work when called upon. No wonder they can't get this plant back up!