A Quake

it is less common for a quake to appear like every 5-10 days. In caves it makes a rumbly rock sound with dripstone falling. when there is a quake it gives you slowness 1 . it can make blocks fall that aren't just sand and gravel, and the blocks that fall can be any sort of blocks in a cave but not ores. The blocks that fall usually come in a bunch of blocks like not one but maybe 30-50 blocks at a time and they usually fall around 10-100 blocks away from you. so it could block some pressius diamond you where about to mine.