Looks like this was indeed the nuking of another DUMB. In fact, there appears to have been two.

The first thing to check is the depth of the quake. Most earthquakes are deep, like 10 miles. These DUMB blasts are in the facilities themselves, so they're shallow, under 3 miles. When reporting quakes, in addition to the distance from the nearest landmark, they always list the magnitude and depth so it's easy to check.

Except for this one. Depth is not in the very short linked Fox 5 Vegas notice. Nor is it anywhere in the very long:

Multiple earthquakes hit Nevada military base known for testing nuclear weapons (Daily Mail 6/5/2025)

Very strange, right? Anyway, we can take a look at the USGS data and the waveforms from the nearest seismic station, along with what I believe the events actually were. Note that they were altering the locations and depths as I wrote this:

6:52:57am PDT Demolition of the first DUMB:

3.2 km depth

M 3.3 - 24 km ENE of Nellis Air Force Base, Nevada

ml3.3 Southern Nevada

7:00:50am PDT Cave in of the first DUMB:

4.1 km depth, but originally listed at 2.0 km. Location now listed slightly southeast of the first event, but originally directly on top of it.

M 1.7 - 22 km ENE of Nellis Air Force Base, Nevada

ml1.5 California-Nevada Border Region

7:10:11am PDT Demolition of the second DUMB:

2.1 km depth, and about 2 km north of the first event

M 1.3 - 26 km ENE of Nellis Air Force Base, Nevada

ml1.3 Southern Nevada

A couple of bonus notes. In the waveform links, they have a feature where you can play it as audio. Try that out for the first event. Hear that thump at the beginning? Wonder what that is.

Also note that the first and third events--which I believe to be nuclear detonations--are almost precisely 17 minutes apart. 17? Where have I heard that before? You can't make this shit up.