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Seismic Array

January 11, 2018

An array of seismographs provides an unprecedented look at the earth beneath the United States.



Peering into earths core. I’m Bob Hirshon and this is Science Update.

The Transportable Array is a network of 400 seismographs deployed in a grid across the United States. Together, theyre creating a subterranean snapshot.

KASEY ADERHOLD (Incorporated Research Institutions for Seismology):

You can think of it as like a CAT scan of the earth.


Thats seismologist Kasey Aderhold, from the Incorporated Research Institutions for Seismology, or IRIS.


These are all meant to be temporary, so theyre recording for at least two years, and thats enough time to get enough earthquake data recorded at that station to image whats beneath it.


Recently, she and her colleagues completed installation of 280 seismographs in Alaska, which will let them image huge sections of the earth that havent yet been explored. Revealing the planets hidden structure will help them understand volcanoes, earthquakes and plate tectonics. I’m Bob Hirshon, for AAAS, the science society.

Story by Bob Hirshon