These gif files offer a quick-look at recent recordings of the BDSN . Your Own Seismogram tool and illustrate the last 24 hours of data from the vertical component seismometer at each station. We will change the stations from time to time, to reflect areas of activity as well as to avoid problems with telemetry outages.
Noise characteristics vary from site to site, and from day to day.
Much of the current background noise is due to the winter storms in California. The long period nature of these records will emphasize large, distant earthquakes rather than small, local events. We hope to provide additional seismograms in the future which will show local events more clearly. And the scale factor is now 0.001.