Penn State - Earthquake Seismology

A Simple Seismic Station Animation

The link below is to a simple animation of seismic station distributions for the last 40 years or so. These are only the stations that are listed in the IRIS data base, many stations from places such as Japan and China are not included. Still, enough stations are included to give you a "feel" for the field-based efforts in observational earthquake seismology.

The large green symbols are permanent stations in the IRIS GSN and GeoScope seismic networks that have been operating more or continuously since the early 1990's (for the most part). These are the highest quality stations with the broadest bandwidths and often, but not always, relatively lower noise levels. The GSN/GeoScope stations are not the only permanent high-quality stations, a number of regional seismic networks have been operating for roughly the same time period.

You have to watch the animation a few times to see all the interesting patterns in seismometer deployment, including the increasing size of temporary deployments, the growth of regional networks, the substantial US Array undertaking, etc.

Links to the Animations. Clicking on these links will begin a download of fairly large files.

Citation: A simple seismic station history, 1975-2016, Charles J. Ammon, Penn State.

Penn State Earthquake Seismology

Department of Geosciences