The earth "breathes" in large earthquakes. I use 6.0 and up for this analysis.
When there are large gaps in days between 6.0M+ and the prior 6.0M+ then a series of more rapid large earthquakes will occur, AND serious Volcano action.
After beginning a study on the large earthquake distribution, it seems like the hugest gap (35 days, and they normally happen on average ever 2 days) in 10 years,
was around the same time as the 2018 Hawaii Volcanic Event.
When I checked, there were 3 gap events that coincided perfectly with the HVE. Freakin' Amazing.
Today September 18, 2019 we are now at 16 days gap between large 6.0M+ EQ.
The first chart is a compilation of sources. Is is a ten year record.
The horizontal access is a scatter chart of one event after another, so it does not reflect "even time" between hundreds of events.
There is large risk now, because we are at large gap, and we have an equatorial coronel hole on the sun, taking aim directly at earth.
This is pretty Epic, IMHO, 70 years of gap data analysed
And some recent volcano history
Although we agree with Oregon State that "injection of new Magma can activate the rest of the chambers magma", we would like to add our own discovery.....that for shallow depth magma chambers, "Activation" which basically means the right conditions for the dissolved gas to become non-dissolved, can also occur via Galactic Cosmic Rays.