Unknown MFSK on 128KHz

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Unknown MFSK on 128KHz
Frequencies 128 kHz,118 kHz
Frequency Range 118 kHz - 128 kHz
Mode USB
Modulation FSK
Bandwidth 16 kHz
Location Northeast Alabama
Short Description A very strong MFSK-like signal
I/Q Raw Recording Download file
Audio Sample

The strength of this signal is unusual, given my difficulty in pulling in any frequency this low with my current setup, so it may be something within my house or the neighborhood. It has been transmitting endlessly for several hours this evening.