Okay, so I'm comparing what I've heard thru Q sources (like Gene Decode) with what the USGS says. The USGS definition of "sometimes" seems to be well over 90%, and in some areas I've seen, with hundreds of "quakes", 100%.
You are welcome to use the USGS definition. I'm presuming it is the USGS's version of fake news, cabal media, to explain something they don't want to explain.
Now, the weak point of what I just said might be - if the USGS has total control of their data, why don't they just make up the depths to be some random number. To which, I could then relate it to glowBull temperatures to GlowBull warming.
At any rate, thanks for looking that up and pointing to it. These days there is so much misinformation coming from what we previously might have seen as reliable sources, one has to discern and churn, and then believe from the heart. I've heard too much about DUMBs; there was the recent story of a tunnel from the Vatican to Jerusalem; about 5 months ago there was a cluster of *hundreds* of 10.0 km "quakes" all near New Zealand - 100% of them at 10.0 km.
RE: Quakes in CHINA
CHINA is not forthcoming with geological information. DUTCHSINSE has noted that for years.