Texans are powered with D-cell batteries which drain rather quickly. The Array of Arrays experiment was an unusual application for Texans, which are normally used in active-source experiments. Students Katie Foster, Patricia MacQueen, and Aaron Wech are programming the Texans with a laptop computer.
#CASCADEA SUBDUCTION INSTALL#
Here, Noel Barstow and Abhi Ghosh install a solar-powered station at the Cat Lake array (right). All others used aircell batteries, which were easier to transport and set up.
#CASCADEA SUBDUCTION HOW TO#
Noel trains the crew (Maisie Nichols, Katie Foster, and Jessica Hawthorne) how to program the RT130 dataloggers with a Sony Clie (right).Īfter a hearty breakfast each morning, the crew met at a rented storage unit to load equipment into their vehicles (left).ĭue to vandalism concerns, only a handful of RT130 stations used solar panels for power. Assisting are Joan Gomberg, Steve Malone, Maisie Nichols, and PASSCALian Noel Barstow.
Principle Investigator Ken Creager helps unpack the PASSCAL shipment (left). The precise location of each tremor event can then be found via "beamforming", a process which reveals vectors pointing to the source of the disturbance.Īpproximate location of the arrays in the upper Cascadia deployment region, and a sense of the higher terrain.
The Cascadia Subduction Zone is where the oceanic Juan de. The CSZ is part of the infamous Pacific Ring of Fire where over 90 of the world’s earthquakes occur. It stretches 700 miles from Northern California to British Columbia. The dense clustering of instrumentation within each array yields improved signal-to-noise ratios and higher-resolution results. The Cascadia Subduction Zone (CSZ) lies off the coast of the Pacific Northwest underneath the Pacific Ocean. Eight arrays, each consisting of 10 Texan (single channel) and 10 RT130 (triple channel) data recorders were deployed across the northern Olympic Peninsula in hopes of catching the next event. The PASSCAL Instrument Center supported research by the UW team, staging out of Sequim, Washington in June 2009. One such region, the Cascadia subduction zone under the Puget Sound, is the focus of an experiment by Ken Creager's group at the University of Washington (UW), called Array of Arrays. Similar to earthquakes but much smaller in magnitude, ETS events are associated with the subduction zone of some convergent plate boundaries. ETS, or 'episodic tremor and slip', is a recently discovered phenomenon in seismic research.
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