I was getting a lot of notices on mine as well (set to 4.0 and up), particularly in the South Sandwich Islands most at the same depth of 6-6.2 miles with Magnitudes of 4.5-7.1 almost every few hours. Genedecode mentions depth in relation to Dumbs just not recalling what they were.

I have heard their is a relation to sunspots/flares as well

I was getting a lot of notices on mine as well (set to 4.0 and up), particularly in the South Sandwich Islands most at the same depth of 6-6.2 miles with Magnitudes of 4.5-7.1 almost every few hours. Genedecode mentions depth in relation to Dumbs just not recalling what they were.