For those reading the article (it was free to read for me at home), it looks like their central point is shown in Figure 2a. Mind the vertical axis as you look

For those reading the article (it was free to read for me at home), it looks like their central point is shown in Figure 2a. Mind the vertical axis as you look across Figure 2. The statistics are thankfully low for strong earthquakes, but another century or so will provide an ample test of their hypothesis.