Two 40 miles away and 2 within 10 miles. Median 40.
I have 4 siblings. One 100 miles from my mom. My brother and I about 12 miles. My two sisters both within 5 miles. Median 12.
My wife has 10 siblings. One 2400 miles. One 1100 miles. One 60 miles. The rest all in Utah County between Eagle Mountain and Spanish Fork. Median 5 miles.