The green trace is track 3, side 2 of HFNRR
test LP—the narrated vertically cut low frequencies. It isn't a sweep, so you get this comb of separate frequencies. The blue trace is Clearaudio CA-TRS-1007
track 4, vertical 20Hz-20kHz sweep. They are, of course, not level-matched. The Clearaudio test LP represents the fairly normal recording level of an actual recording.
Isn't it interesting? We have not just one, but four low frequency resonance peaks! Two are centered around 10 Hz, and two larger ones around 20 Hz. And the peaks of this resonance, caused by specially devised exaggerated signal, are at about the same level as the armtube and headshell/cartridge modes.