PASSCAL Experiments http://www.passcal.nmt.edu/rss/experiments en 2014 IBD http://www.passcal.nmt.edu/scheduledetails/exptnumb/201410 The IRIS Interns will deploy three BB sensors behind the PIC and leave them deployed for ~5 days. Taku Glacier http://www.passcal.nmt.edu/scheduledetails/exptnumb/201441 Taku Glacier is an advancing tidewater glacier. We will use GPS, borehole instrumentation, and seismometers to investigate the relationship between glacial erosion, subglacial hydrology, and glacier dynamics. DC Shake http://www.passcal.nmt.edu/scheduledetails/exptnumb/201437 A ~30-station array in the Washington, DC area to measure variations in ground shaking (site response) due to local variations in the shallow geology. Teacher Training http://www.passcal.nmt.edu/scheduledetails/exptnumb/201440 A brief refraction experiment in the field behind PASSCAL. We will be using two Geode multichannel units with 24 take-out cables, and also the PEG (Propelled Energy Generator). The experiment/demo is expected to take about an hour. The demo will illustrate wave fields measured with the Geodes, and how to infer layering underground. The date may change by a day or two, but will definitely be during the week of October 13th-17th. POLENET2 mini array http://www.passcal.nmt.edu/scheduledetails/exptnumb/201401 We propose to continue and expand GPS and seismic studies in the ANET-POLENET Phae 2 project in order to advance understanding of geodynamic processes and their influence on the West Antarctic Ice Sheet. The work will, include the continental West Antarctic Rift System (WARS) and its shoulder along the Transantarctic margin of East Antarctica. In partnership with UK colleagues, we propose a new high-resolution crustal and mantle seismic transect that traverses the deepest subglacial basins, including the glacio-dynamically critical Pine Island and Thwaites Glacier regions. Crust and mantle structure of the deepest WARS basins and the Ellsworth-Whitmore mountains crustal block will be resolved by this transect. A nominal plan to reduce ANET by approximately half to a longer-term community 'backbone network' in the final 2 years of this project is presented, contingent on future funding. Note: this instrument request applies to the additional temporary seismic stations needed by POLENET2, and does not describe the 2 additional stations and other upgrades and servicing activities associated with the "backbone" stations. UPPA-GL http://www.passcal.nmt.edu/scheduledetails/exptnumb/201403 This project is aimed at studying the crust and mantle structure under Greenland, which reflects the Precambrian to modern tectonic assembly of the island. Seismological data provide important constraints that are otherwise unavailable due to the thick ice sheet that covers most of Greenland. Knowledge of such structure allows us to test hypotheses about the tectonic history of Greenland, the causes of current ice flow, and lateral variations in elastic and viscous strength that control patterns of glacial isostatic adjustment. It also provides important information about the lower boundary condition for the ice sheet, including heat flux, and allows accurate prediction of seismic wave propagation, needed for analysis of earthquake source processes. Sweetwater http://www.passcal.nmt.edu/scheduledetails/exptnumb/201429 Collaborative experiments with NodalSeismic and Nanometrics to conduct a mix phase array of continuous recorded nodes with broadband sensors. Kansas CO2 http://www.passcal.nmt.edu/scheduledetails/exptnumb/201419 Small-scale CO2 injection in Wellington, KS will be monitored using seismometers, continuous GPS, InSAR, downhole CASSM, crosshole tomography, acoustic (pseudo high resolution VSP) and differential temperature with fiber optic (well and surface installation), and U-Tube sampling of fluids. Project funding provided by DOE. Man Made Maars http://www.passcal.nmt.edu/scheduledetails/exptnumb/201434 A series of field-scale chemical blasts will be performed in order to investigate the relationship between scaled depth of burial and the seismoacoustic wavefield. We look forward to elucidating the transition from gas release dominated to ground acceleration dominated acoustic regimes as burial depth is increased, as well as clarifying the different mechanisms by which buried explosions produce sound. Broadband seismometers, accelerometers, and high speed imagery will constrain the ground motion during each explosion. Results from this study will aid in the interpretation of seismoacoustic signals from volcanoes as well as buried chemical and nuclear explosions. Cascadia Initiative http://www.passcal.nmt.edu/scheduledetails/exptnumb/201430 This deployment of approximately 15 broadband instruments is to complement the focused OBS array of the Cascadia Initiative. Beginning in July 2014, 20 OBS will be deployed offshore this region with approximate station spacing of 10-15 km. We want to record on land with a comparable station spacing for as long as possible during the 12-15 month OBS deployment.