5:5
>>5543043 (lb)
Another
John Ristau: "You can see that the amplitude of the signal varies over time; however, the frequency, or period, of the signal is virtually uniform for the entire time. This implies a source that is producing a signal at one consistent frequency, but the strength varies."
https://www.stuff.co.nz/auckland/local-news/northland/archived-sections/world/108956850/Strange-seismic-waves-rippled-around-the-world-and-scientists-don-t-know-why