The University of Arizona Nodal Array


Nodal seismometers are portable enough to be deployed in large numbers over rugged terrain and can record continuously for ~35 days.  The University of Arizona FairfieldNodal Zland system includes 96 nodes, a 32-dock charging/harvesting rack, a PowerT Dell server, and two Trimble handheld devices for activating instruments in the field.  Each node houses lithium ion battery packs, three perpendicular 5 Hz geophones, a GPS receiver, and a datalogger.  A spike is attached to bottom of each node for coupling of the node to the surface or to the bottom of small holes when the instruments are buried.


Indian Heaven Volcanic Field (Aug.-Sept. 2017)

(Left) Sawtooth Mountain in the Indian Heaven Volcanic Field.  (Right) Node deployment around the periphery of the Indian Heaven Volcanic Field.  Red squares are node locations.  White triangles are volcanic vents.

Central Oregon Profile (June-July 2017)

(Left) Eric Kiser deploying a node in Oregon.  (Right) Node deployment through central Oregon that included University of Arizona, University of Utah, and PASSCAL nodes (174 in total).  Red squares are node locations.  

Santa Rita Fault (April-May 2017)

(Left) Ashlee Cowles and Danial Portner in front of the Santa Rita Mountains.  (Right) Node deployment over the Santa Rita Fault.  The red squares are node locations.  Each square represents an 8-node array (see inset).