Hmm. People's math in this thread is right, but I for one can't stand to be in a place where the SPLs are 110 dB (let alone 120+) for longer than very brief intervals. It's possible that this is input overload due to high SPLs, but that wouldn't be my first guess.
More to the point, your waveform display is quite odd. It looks as if the music (the more or less continuous material) is peaking at rather low levels--around 20 dB below full scale. But some very strong impulse noise seems to be present as well, mainly in what I assume is the right channel of the recording (the one that's beneath the other one). The asymmetry of these impulses (mostly negative-going) is striking as well.
If this is an unaltered acoustic recording from a pair of microphones in the same recording space, I would say that something is seriously wrong with either the connections or the equipment. There's no ordinary way that your left microphone could (mostly) fail to pick up something so huge in the right microphone. No microphone in the world is that highly directional. So I don't think that those peaks represent an acoustical phenomenon.
Have you tried testing the setup at home, wiggling the cables at all the points of connection to see if something is intermittent, etc.?
--best regards