RSAM plot from Jan 17 - Feb 8, 2010.
Real-time Seismic-Amplitude Measurement (RSAM) was developed by the USGS to summarize seismic activity during heightened volcanic activity. For more information on RSAM see the Alaska Volcano Observatory's RSAM page. Seismic data are provided by the National Science Foundation funded Plate Boundary Observatory operated by UNAVCO. Click on the
image for a larger version.