There is a very strong station there located in Germany with the call DCF 39 or DCF49.
The DCF QRG's are 129.10 and 139.0 Khz. Transmition mode 200 bps ASCII (8E1) with shift 340 Hz.The DCF has on both QRG's a steady carrier and at about every 10 seconds send a message in FSK mode. The locator of the DCF is at JO52WG near Magdeburg - Germany.
The antenna is a vertical monopole 324m high with EIRP (Effective Isotrope Radiated Power) 40 KW omnidirectional. In the spectran you can see the shift keyer and with Mix-W you can see the text. DCF is a very useful tool to test your antenna - Receiver and to tune filters and preamplifiers for the 137 Khz amateur band.
Here is what you can see with the MIX-W program.
The station DCF39/49 trasmit on 129.1 and 139.0 Khz.