The seismograms reveal that things are quieter today at Yellowstone: few quakes, no tremor (see below). This earthquake swarm has been notable for its intensity, but there has been nothing about it that suggested magma movement. It’ll be interesting to see what the seismologists have to say about it when they have gathered their data and made their analysis. In the meantime, Yellowstone needs careful monitoring – but then, it always does.

Above: seismogram from Lake station, Yellowstone Park, for 4 January 2009. If volcanic catastrophe were imminent you would be able to see the face of God in this image.

News
Fears over earthquake ’swarm’ at Yellowstone National Park – The Times, 4 January 2009
Yellowstone earthquake swarm: latest supervolcano update – US News & World Report, 4 January 2009

Information
Global Volcanism Program: Yellowstone – information about the Yellowstone Plateau volcanic field (1205-01-)
Yellowstone Volcano Observatory – monitors activity at Yellowstone
University of Utah Seismograph Stations – UUSS home page, including Yellowstone updates
Yellowstone Region seismogram displays – near real-time seismogram traces for Yellowstone
USGS earthquake list for Yellowstone – constantly updated earthquake data for Yellowstone