The principle is simple: a fault segment that has ruptured in a large quake in the past will-once enough strain has again accumulated-likely fail again in a similar-size earthquake.

In principle, the tiny twisting effect due to the quantum grains should have accumulated over the very large distance into a detectable signal.

Measures as follow ought to be taken: shareholders and directors' abiding the Principle of honesty and credit, taking accumulated vote system, shareholders' taking the subrogate right of action.