This also provided a lot of context but was pretty far down into the article so I'll share here:
> This happens on an approximately 20-year cycle, she said, which puts the area right on schedule: The last time it was this seismically shaky was in 2005.
> This happens on an approximately 20-year cycle, she said, which puts the area right on schedule: The last time it was this seismically shaky was in 2005.