PASSCAL Experiments http://www.passcal.nmt.edu/rss/experiments en 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. 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. 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. 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. SEGMeNT http://www.passcal.nmt.edu/scheduledetails/exptnumb/201302 This experiment will acquire a family of geophysical, geochemical and geological observations in and around northern Lake Malawi to test fundamental hypotheses regarding continental rupture. Together, these data will allow us to characterize extensional deformation and magmatism at depth in the crust, mantle lithosphere and upper asthenosphere. These include seismic reflection data, onshore/offshore wide-angle seismic reflection/refraction data, passive seismic data (including body waves and surface waves), seismicity, long-period and wide-band MT data, continuous GPS data, InSAR data, and geochemical data. The IRIS PASSCAL component consists of 40 BB stations and 16 IP stations deployed for a period of 18 months. Mt St Helens http://www.passcal.nmt.edu/scheduledetails/exptnumb/201405 Seismic tomography experiment of the Mt St Helens volcanic system. Project consists of 2 orthogonal refraction profiles and 4 areal surveys to record 24 shots. Target goals are to illuminate the upper, middle, and lower crust of the Mt St Helens volcanic system. Mt St Helens http://www.passcal.nmt.edu/scheduledetails/exptnumb/201405 Seismic tomography experiment of the Mt St Helens volcanic system. Project consists of 2 orthogonal refraction profiles and 4 areal surveys to record 24 shots. Target goals are to illuminate the upper, middle, and lower crust of the Mt St Helens volcanic system. 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. 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. 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.