Transportable Array

Incorporated Research Institutions for Seismology (IRIS)

The Transportable Array (TA) is one of four key observatories that make up IRIS’s Earthscope USArray. The TA is a network of 400 broadband seismographs and atmospheric sensors that have been operated at temporary sites across the United States from west to east in a regular grid pattern, beginning in August 2007. The Transportable Array is currently using Trillium 120 vault seismometers, Trillium 240 vault seismometers, Trillium 120 posthole seismometers and Titan accelerometers.