Fear before him, all the earth: the world also shall be stable, that it be not moved. What's not to understand ?
Well you don't seem to have understood that Asaph, and others, were praising God - singing a hymn/prayer of praise, which uses poetic language and not literal, scientific detail. (These verses are the same as the first half of Psalm 105, by the way.)
The earth IS stable. As I've said before, it does not go drifting off over the universe, getting either so close to the sun that it burns up, or so far away that we all freeze to death. Yet the earth clearly moves - even you have acknowledged that we have earthquakes.
You don't seem to understand that because you insist on taking these, and other, verses of the Bible literally, you have dismissed all scientists, eye witnesses etc, as "liars". Just dismiss everything they say; what do they, the experts, know? And never mind that some of them are Christians - indeed, they may have even become Christians because their work led them to conclude that there has to be a Creator. Just dismiss them as Freemasons, liars, people who are "paid to say what they say" or who say it for fear of being beaten up.
It's easier to do all of that than to think, ask sensible questions, try to reason and learn something.