Within the IRIS Data Management System some data collection and processing nodes perform
picking of phase arrivals on seismograms as part of a their processing. These phase picks
are usually associated with origin estimates from the ISC, USGS NEIC or regional network
operators.
These data have also been added to the IRIS DMC's event tables and will eventually be
available from other interfaces such as SeismiQuery and the DMC's ws-event web service.
These products are presented here in the same format in which they were submitted to the DMC.
Usually this is the IASPEI Seismic Format (ISF) with DMC extensions, for more information on
this format please visit
http://www.iris.edu/data/event/isf_format.htm
