Isaac Asimov wrote a short story titled “Nightfall”, where he explored the panic of a civilization with two suns that simultaneously went into eclipse.

That primordial fear / panic is what I felt when the ash from Mt. St. Helen blotted out the daylight in the days after the eruption.

Actually, there’s something primordial and fearful about Yellowstone itself, walking among the burbling hot springs, the constant smell of sulfur in the air, the yellow and orange and red streaks in the earth — not to mention the explosive mini-eruptions of the geysers.