I am hearing them tonight also in central California. I am sure they are not coming from a low power desert beacon as they are heard all over North America and even in South America,
Tonight while listening to my own receiver on 7050 and using a nearby Kiwi SDR, I heard them simulcast on lots of non-ham frequencies:
3150, 4200, 4525, 6700, 7450, 7950, 8700, 9100, 9375, 9500, 9950, 10625, and 11200. HF was very quiet tonight and it was fairly easy to spot the beeps with a Kiwi SDR set to wide steps.
First heard at 0709utc, off at 0740utc.