PASSCAL Experiments http://www.passcal.nmt.edu/rss/experiments en DRRISWIV - WINTER (DRIS) http://www.passcal.nmt.edu/scheduledetails/exptnumb/201424 Ocean gravity waves are dynamic, changeable elements of the global ocean environment, affected by ocean warming and changes in ocean and atmospheric circulation patterns. Their evolution may thus drive changes in ice-shelf stability by both mechanical interactions, and potentially increased basal melting, which in turn feed back on sea level rise. Our proposed research is intended to discover, through field observations and numerical simulations, how ocean wave-induced vibrations on ice shelves in general, and the Ross Ice Shelf (RIS), in particular, can be used to infer spatial and temporal variability of ice shelf mechanical properties. The mechanical forcing to be examined involves a broad spectrum of surface gravity waves spanning local wind seas (at periods less than 10 s), sea swell (in the 10 - 30 s period band), and infragravity (IG) waves (periods from about 50 to 300 s). ENAM CSE http://www.passcal.nmt.edu/scheduledetails/exptnumb/201407 The project is an active-source and broadband, onshore and offshore seismic experiment that is focused on the East Coast margin around Cape Hatteras. The study area, encompasses the rifted margin, from unextended continental lithosphere onshore to mature oceanic lithosphere offshore, as well as along-strike changes in margin structure and two major fracture zones that are associated with significant offsets at the modern Mid-Atlantic Ridge. The study also covers several features representing the post-rift modification of the margin by slope instability and fluid flow. HWO http://www.passcal.nmt.edu/scheduledetails/exptnumb/201361 A series of rocket motor explosions to be conducted at EMRTC (Socorro, NM) for the purpose of improving understanding of ground and atmospheric coupling. The experiments will be conducted in four different seasons to study climate variability on atmospheric signals. Mount St Helens aka iMUSH http://www.passcal.nmt.edu/scheduledetails/exptnumb/201406 A 70-element broadband array will be deployed for two years, in a 50-km-radius pattern surrounding the Mount St. Helens volcano. This array will be used for a variety of analyses, both of Earth structureand seismicity. The 10-15 km station spacing is designed to optimize imaging from the middle crust to slab, and to provide a substantial boost in our ability to detect small earthquakes and deep long-period earthquakes. P- and S-wave tomography using both earthquake and active sources will be applied to direct and Moho-reflected arrivals to image the volcano. Receiver functions analysis will reveal wavespeed discontinuities in the mid crust, Moho and subducting slab. Ambient Noise Tomography will provide constraints on the shear wavespeeds throughout the crust and upper most mantle. 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. 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. UOFG2014 http://www.passcal.nmt.edu/scheduledetails/exptnumb/201408 Field geophysics class. Purpose is to collect shallow reflection and refraction data over landslides in the Coast Range and active faults in central Oregon. ENAM CSE http://www.passcal.nmt.edu/scheduledetails/exptnumb/201407 The project is an active-source and broadband, onshore and offshore seismic experiment that is focused on the East Coast margin around Cape Hatteras. The study area, encompasses the rifted margin, from unextended continental lithosphere onshore to mature oceanic lithosphere offshore, as well as along-strike changes in margin structure and two major fracture zones that are associated with significant offsets at the modern Mid-Atlantic Ridge. The study also covers several features representing the post-rift modification of the margin by slope instability and fluid flow. 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. 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.