Wednesday, March 13, 2019

"RF Seismograph" May Give Advance Notice of Earthquakes

The VE7DXW RF seismograph (from website)
A ham in British Columbia has developed an "RF Seismograph" that detects changes in noise and activity levels on the HF spectrum resulting from earthquakes. According to the ARRL Letter, Alex Schwarz, VE7DXW, reports that the device has not only monitored band changes associated with earthquakes as they happen, but in some cases has begun tracking increased noise levels up to an hour before a quake. He says electric field lines associated with earthquakes result in increased RF noise levels. Schwarz is continuing to conduct research and analyze links between earthquakes and HF noise level changes.