Howdy,

I think the swarms on the southwest margin of the Salton Trough may be significant. I think these are related to a larger detachment between the pluton field of In-Ko-Pah and the epithermal centered swarm near Agua Caliente.
A portion of the detachment runs up the Elsinore fault, and then slews northeast around Fish Creek and ties back into a smaller fault, the Earthquake Valley fault. This entire area has been active for about 3 months. The In-Ko-Pah swarm is rare, at least since 1973. The Agua Caliente swarm is not rare, but is hitting at a faster clip than before. North Anza Gap depths are holding at 20 Km for the micros. They usually have a bit more vertical differentiation than that. As I found out, (missed prediction below on the forum) that does not mean a larger quake, yet.

Swarms may help us to visualize the deeper faults better, especially detachments and blind thrusts. I think they are worth study. But I focus on the depths and the fault info I can get. 2D swarms seem a bit useless to me. Kind of like Obsidian Butte, and they are all 1 Km deep. Doesn't say much for the stress pattern across the region..

Glen

• Western Salton Trough