>> 4232285 (pb)
Longest wavelength of the identified propagation wave in the following locations:
Hanford, Washington, USA @1628
Corvallis, Oregon, USA @1626
Hockley, Texas @1646
Cathedral Cave, Missouri, USA @1643
Black Hills, South Dakota, USA @1636
Alum Creek State Park, Ohio, USA @1646
Peaks-Kenny State Park, Maine, USA @1650
Treating Corvallis, OR as the 'epicenter' (it wasn't) distance to as the crow flies
232.23mi to Hanford, WA (373.73km)
965.61mi to Black Hills, SD (1553.99km)
1,708.47mi to Cathedral Cave, MO (2749.51km)
1,811.15mi to Hockley, TX (2914.76km)
2,053.53mi to Alum Creek, OH (3304.83km)
2,594.26mi to Peaks-Kenny, ME (4175.05km)
Hanford again as epicenter LongestWavelengthTime - 16:26 =
2 minutes Hanford, WA (120s)
10 minutes Black Hills, SD (600s)
17 minutes Cathedral Cave, MO (1,020s)
20 minutes Hockley, TX (1,200s)
20 minutes Alum Creek, OH (1,200s)
24 minutes Peaks-Kenny, ME (1,440s)
Distance divided by time = average speed to recording station
373.73 / 120 = 3.11km/s to Hanford, WA
1553.99 / 600 = 2.59km/s to Black Hills, SD
2749.51 / 1020 = 2.70km/s to Cathedral Cave, MO
2914.76 / 1200 = 2.43km/s to Hockley, TX
3304.83 / 1200 = 2.75km/s to Alum Creek, OH
4175.05 / 1440 = 2.90km/s to Peaks-Kenny, ME
The speed fits a crust quake according to wikipedia
> The propagation velocity of the waves depends on density and elasticity of the medium. Velocity tends to increase with depth and ranges from approximately 2 to 8 km/s in the Earth's crust, up to 13 km/s in the deep mantle
https://en.wikipedia.org/wiki/Seismic_wave
What doesn't fit is…
While this is a good candidate to be the quake we see the wave for across the entire US, time location, etc,
https://earthquake.usgs.gov/earthquakes/eventpage/us1000i5cf/executive
This other quake (although slightly weaker 4.8 instead of 5.4) doesn't appear to register on any of the seisomgrams and its deeper (should be traveling faster)
https://earthquake.usgs.gov/earthquakes/eventpage/ak20477170/executive
This might suggest that the wave is traveling in a particular direction and the 4.8 in AK is oriented in another direction so it isn't felt by the same seismograms but that is just a guess.
Seisomgrams: https://earthquake.usgs.gov/monitoring/operations/heliplot.php?virtual_network=ANSS
the 5.4 quake is also very close to the Chinese listening station mentioned in the news awhile back cited by >>4232405