There are two sources for Schumann resonances on the web that I know of:

1. Location: Tomsk, Russia http://sosrff.tsu.ru/?page_id=7
   Frequencies http://sosrff.tsu.ru/?page_id=9
   Amplitudes http://sosrff.tsu.ru/?page_id=12
   Quality factors http://sosrff.tsu.ru/?page_id=14

2. Location: Cumiana, Italy http://www.vlf.it/cumiana/livedata.html

Tomsk (1) is still going. OP is looking at someone publishing this data on Twitter on a regular basis, and his laptop is broken (for the next 3 months... ?!)

Schumann frequencies are very low frequencies, they wrap around the globe. If the two measuring stations above show very different data, they might be local disturbances picked up by the antennas.

There are two sources for Schumann resonances on the web that I know of:

1. Location: Tomsk, Russia http://sosrff.tsu.ru/?page_id=7
   Frequencies http://sosrff.tsu.ru/?page_id=9
   Amplitudes http://sosrff.tsu.ru/?page_id=12
   Quality factors http://sosrff.tsu.ru/?page_id=14

2. Location: Italy http://www.vlf.it/cumiana/livedata.html

Tomsk (1) is still going. OP is looking at someone publishing this data on Twitter on a regular basis, and his laptop is broken (for the next 3 months... ?!)