How big a hole does the Quake spell in 50 Fathoms produce? The description says that those who make their save, cling to the sides and may climb out.
Savage Worlds uses a small, medium and large burst template. They measure 3, 4, and 5 inches in diameter. Page 62 of the first edition rules states one inch on the battle map is equal to 2 yards. Using that, the Quake spell, which uses the large template, produces a hole about 10 yards in diameter.