Is this the actual point where the fault slipped?

Yep. This is the break that occurred in a fraction of a second. Think of this crack propagating along the ground at a few kilometers per second. Local ground accelerations would have been >1 g--i.e. you'd've been thrown into the air. These quakes would have been catastrophic had they occurred in a populated area; as it was, there were no injuries and trivial property damage (an outhouse fell over).

Thanks for the detail on this. I've not seen such specific, natural, visual indicator of a quake. Judging from the trees, this scarp is about 4 feet?

Actually, it's more like 15 ft! Surface breaks like this are extremely common in earthquake-prone areas. This one, being so young, is really obvious, but (again) when you get your eyeballs calibrated you see them all over the place. Lots of those little ledges and benches and bluffs along the bases of mountain ranges in the Great Basin are old fault scarps. They get more rounded with age, as you might expect, and a Geology 100 exercise we used to do at UNR is to measure an old scarp profile in suburban Reno and estimate its age from the degree of rounding.

I was looking at the upper tree, looking now at the one on the lower left I see how tall the scarp. Many years ago I used to hike with a man who could help you see what wasn't obvious about the landscape, even in upstate New York. I enjoyed that and appreciate the detail you provide here. Would be interesting to see landscape through your eyes once in awhile, though have to admit that my focus is more on what humans have done to the landscape.