High amplitude recording, is it a local earthquake or some other signal?

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Hi! Yesterday morning when reviewing the night record of my station, I noticed a significant amplitude. At first glance, it seems like a local event; however, when observing the spectrogram, it looks more like an anthropogenic signal. At the time of registration, it was around 04:00 am. At that time, there is no noise, and everything is calm.
What are your opinions? What could have caused this signal? A local earthquake, or is it an anthropogenic signal?

I appreciate their answers
I attach the recording.

Unknown event M0.47 22052021
Unknown event M0.47 220520211257×920 53.2 KB

RB581_EHZ_AM_01
RB581_EHZ_AM_01900×700 21.1 KB

Sin título25
RB581_EHZ_AM_00.mseed (144 KB)

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It has the waveform of some earthquakes I have seen, but the values are very high. Did something fall to the floor near the Shake while you were sleeping?

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Maybe yes, but it would be strange since it is in an isolated area with no objects that can fall. Although I was analyzing the audio record, it appears to be something that fell and hit the ground.

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