[Strategerist]

That was an M 6.4 earthquake in Vanuatu (in the South Pacific) on the South Dakota display.

[moose07]

As you say could be wind.
The Vanuatu plot is loud and clear, but no sign of the noise from Utah's recorder.
I've been over several systems in the last half hour ,the only one reporting this noise (that i’ve found) is Utah University.
One of the sites over here is very prone to noise from the Americas, for some reason, and there is no sign of this on there either.