mrtn
Dagobah Resident
Yes, the moon comes to mind. But it's not a general pattern visible in the previous years of seismic activities. Also, I saw the frequency doesn't match the full moon / new moon pattern. The current yellow bar falls on a full moon, but the previous red bars fall more in between full/new moons. I don't know if the distance change is linked to the phases or has its own frequency.The orbital rhythm of the moon likely has a bearing on that, it has about a 15 day swing from peak to trough in the distance to earth.