Tiny aftershocks are in a cloud or arcs northwest of the quake. One question is, is this real or an artifact? If real, then, why? This quake was a bit northwest of the "cute little ring of quakes" that I posted a few weeks ago, a couple days before the 4.7. The NNE-SSW line of tiny quakes linking across from the Elsinore to the Jan Jacinto system seemed to have gotten a little more active in the few days or week before this 5.4.

I, like others posting here, think that the 5.7 on southern Elsinore, the 4.7, and now the 5.4 are not the end of this series, and that a quake >6 would be unsurprising. The obvious places are the faults lit up with microquakes that have not broken in a big quake, like the southern Elsinore from the NW end of the 5.7, and the San Jacinto in the area of the 4.7 and 5.4. Brawley/Salton Sea areas have been very quiet last several weeks. Logically these would be less likely to go in the next few months, but I am likely to be wrong.

One of you who is familar with the earthquake history of strands of San Jacinto, looking at the micro-seismicity, might be able to distinguish areas that are due for a M7 or so; I have lost track except I guess the Anza gap never filled and Elsinore has not had one in the last decades that I am aware of.

Caution: I don't know anything about this that the rest of you don't know: so me working sort of in the field should not give me any credibility here: not a prediction.
Chris