PASSCAL Experiments http://www.passcal.nmt.edu/rss/experiments en 2014 IAS http://www.passcal.nmt.edu/scheduledetails/exptnumb/201411 Description:Imaging the Socorro Fault. Swells http://www.passcal.nmt.edu/scheduledetails/exptnumb/201454 A feasibility study. We are measuring the frequency of seismic energy generated by ocean waves generated as they break on the beach. Teton Dam http://www.passcal.nmt.edu/scheduledetails/exptnumb/201438 Buried several hundred pound shot. Study designed to look at source physics. Shot scheduled for 4-5 Sept. 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. Banda Arc http://www.passcal.nmt.edu/scheduledetails/exptnumb/201412 Eastern Indonesia is one of the least well understood geological domains of our planet, and yet the region provides a truly remarkable natural experiment for unraveling the complex dynamics of convergent tectonics. 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. Ross Ice Shelf (RIS) http://www.passcal.nmt.edu/scheduledetails/exptnumb/201425 We will deploy 18 autonomous broadband seismographs provided by the IRIS PASSCAL program for two continuous years on the Ross Ice Shelf (RIS) between Ross Island and MBL to constrain the mantle structure and dynamics of the Ross Sea Embayment. These stations would take advantage of the presence of the ice shelf to fill a major ocean-covered geological gap within Earth's least studied extensional continental province and would link data sets collected in the TAM transition/Plateau region (TAMSEIS) and in West Antarctica (POLENET) to greatly improve resolution of mantle features beneath Antarctica. Deployment on the ice shelf offers the opportunity to collect seismic data without the expense, logistical complexity, and iceberg hazards associated with ocean bottom seismograph deployments, and limited pioneering deployments on the ice shelf show excellent recording of P waves and 8-50 s Rayleigh waves. Tomographic models developed from this data will be used to choose between competing models for the dynamics of the Ross Sea. In particular, we will investigate whether low velocity hot mantle is localized in the vicinity of Ross Island and the MBL Dome. Alternatively, a broad region of hot mantle, including the Eastern Ross Sea, would indicate distributed recent tectonic activity and call into question models proposing that Eastern Ross extension ceased during the Mesozoic. These data will also allow us to investigate the deeper structure (gt 200 km) to evaluate the possible role of mantle plumes and/or small- scale convection in driving regional volcanism and tectonism across the region. 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. Blood Falls http://www.passcal.nmt.edu/scheduledetails/exptnumb/201316 On Taylor Glacier, as part of a past study we discovered seasonal seismicity localized on the crevasse out of which the unique Blood Falls feature flows, accompanying ground penetrating radar suggests that this feature is underlain by a fault in the subglacial material. This new project is aimed at discovering the source for Blood Falls and its relation to the seismicity and subglacial fault. We request 3 broad band seismometers which will be deployed for just over 2 years (3 summers). We also request 3 temporary short period seismometers to deploy during the summer months while we are on site. These will provide better source locations. The broad band stations will be deployed in sediments or on rock (stable boulder or bedrock) depending on availability. NAPA2 RAMP http://www.passcal.nmt.edu/scheduledetails/exptnumb/201452 August 24 2014 West Napa Earthquake Aftershock Deployment RAMP