PASSCAL Experiments http://www.passcal.nmt.edu/rss/experiments en RIS- SUMMER http://www.passcal.nmt.edu/scheduledetails/exptnumb/201422 We are requesting at total of 25 L22 3-component geophone packages to be deployed for one month to augment a 10 station broadband array centered near -78.99, 180.575E. This a joint request with the Wiens, Aster, Nyblade earth sciences Mantle Structure and Dynamics of the Ross Sea from a Passive Seismic Deployment on the Ross Ice Shelf project. Sample rate desired is 200 samples/s. The L22 stations are to be deployed for approximately 1 month duration by snowmobile from a base camp located at the array center during deployment of broadband stations, and recovered prior to departing the base camp. The array dimensions are approximate. The array will effectively be contained in an approximate circle with about a 15km radius 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. 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. AZ RAMP http://www.passcal.nmt.edu/scheduledetails/exptnumb/201443 Temporary deployment of 5 - 6 short period stations to record and better locate the swarm of earthquakes that have been occurring since an M 5.2 occurred on 06-22-2014 near Duncan, Arizona. 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. WBSH http://www.passcal.nmt.edu/scheduledetails/exptnumb/201325 Flex array deployment in Wabash Valley seismic zone. The Wabash seismic zone is an intraplate seismic zone in the middle of the continent that has received little attention despite several magnitude 4.5-5+ events in the past 50 years. The seismic structure and many basic characteristics remain unknown. The experiment will comprise a line of 45 broad band instruments across the valley and three 9 component short period phased arrays to probe both the physical structure and the levels of background seismicity occurring in this enigmatic feature. 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. 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. 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.