Just a cursory look puts the launch location on the western edge of the W-289 area, or maybe the corner of the W-290 area. I did a quick check but couldn't come up with any NOTAMs on the area.
(admittedly, my knowledge of getting a NOTAM out of the system is low..)
You'd think that if it was a US launch of any sort, they'd NOTAM it to avoid any traffic interference issues. Would hate to have some airliner inbound from Hawaii to LAX stumble thru that area at just the wrong time.
If there is no NOTAM, then maybe it wasn't one of ours.