I had a skim through and it's a fascinating paper. It's not the storm sure that causes the slow quakes, it's the drop in atmospheric pressure associated with the storm reducing the vertical stress on the crust. Also, not all slow earthquakes are caused by typhoons apparently.


"What Liu, Linde and Sacks call "slow earthquakes" are movements of plates which occur over long periods of time, and are not destructive"

No, they are still earthquakes just a different type of quake; this phrase would have been picked up in peer review (or before almost certainly but the editor). They move immense amounts of crust and play a role in triggering ordinary earthquakes.


"I don't think that any additional water has been pulled in from anywhere."

A storm is not a closed system so exchanges of all sorts will occur between it and the environment it exists in and air, water, heat etc will all move in and out of the storm's vicinity.


Pedant's note: The Richter scale isn't used anymore and hasn't been since the seventies.