Heliplots USGS show the earth movement around the world. Normally the plots are somewhat clear, but something is happening in one area of Wyoming(Station US BW06 (Boulder Array Site 6 (Pinedale Array Site 6), Wyoming, USA) while the Yellowstone heliplot has moderate activity. Also activity in Texas. Image related. Heliplots are seismograms that are updated every 30 minutes on this site.
https://earthquake.usgs.gov/monitoring/operations/heliplot.php
https://earthquake.usgs.gov/static/earthquake-network-operations/Seismic_Data/telemetry_data/BW06_24hr.html
http://seis.sc.edu/SOD/
https://www.fdsn.org/networks/detail/US/
How to read seismograms and what they mean
http://www.geo.mtu.edu/UPSeis/reading.html
Earthquakes around the world in 3D
http://www.earthquake3d.com