map of controlled-source seismic line
map of controlled-source seismic line
Snake River gorge, where the seismic line crosses the Idaho-Oregon boundary
sign in a ranching valley near Midvale, Idaho
Long Valley, Idaho; the mountains in the background are the Western Idaho Shear Zone
another flat tire, being changed by Lindsay Sabey (Virginia Tech grad student)
the Sawtooth Mountainns, central ID, in the Idaho Batholith
deploying under a menacing cloud of smoke from the Halstead fire, central Idaho
the Lost River Valley and Lost River Range, eastern Idaho; this region is actively extending
bees on a desert flower near the Snake River canyon
Most of the 61-person IDOR Controlled-Source Seismic crew were volunteers, mostly students, from 22 different universities.
the shot loading and stemming crew, led by Steven Harder (professor at University of Texas, El Paso), in front of the explosives pump truck
the survey crew, led by Kathy Davenport (graduate student at Virginia Tech), surveyed the seismometer sites prior to arrival of the deployment crew
George Slad (staff at IRIS-PASSCAL) training the crew how to deploy a seismometer (ground shaking sensor - orange) and seismomograph (recording unit - in plastic bag; this device is nicknamed a "Texan")
Strawberry Mountain, near Prairie City, Oregon; these mountains are comprised of island-arc terranes accreted to North America
Maureen Kahn (undergrad volunteer from Carleton College) deploying a Texan seismograph in eastern Oregon
Messan Folivi (undergrad volunteer from Southern University) deploying a Texan seismograph in western Idaho
one of two occasions that a vehicle had 2 flat tires simultaneously; it was a ~5-hour walk out in 95-degree sun
Ray Russo (IDOR project PI; professor at Univerity of Florida) enjoying the view from Snowbank Mountain, on the Western Idaho Shear Zone
Rich Gaschnig (postdoc volunteer from the University of Maryland) meeting all Forest Service requirements for road work
Basil Tikoff (IDOR project PI; professor at University of Wisconsin, Madison) and Annia Fayon (professor at University of Minnesota) teaching the crew about the Idaho Batholith and Western Idaho Shear Zone during a mid-project field trip
Jennifer All (undergrad volunteer from Radford University) leading a crew of seismometer deployers on a 16-km hike, crossing the Deadwood River, Idaho
the Halstead fire, central Idaho, as viewed from the seismic line; seismometers were not deployed as originally planned along the road in the foreground
when picking up the Texan seismographs, one was found under a piece of heavy machinery; it can be seen poking out at the end of the shovel
Borah Peak in the Lost River Range, eastern Idaho; the range front is the fault scarp of the 1983 magnitude 6.9 Borah Peak earthquake; this fault is actively extending
Band-pass filtered data from one shot.
The image shows strong P-wave and S-wave energy that has refracted (turned) in the crust,
energy that has reflected from the mid-crust and the Moho, and energy that has refracted in the uppermost mantle.