PASSCAL Experiments http://www.passcal.nmt.edu/rss/experiments en Sev Array http://www.passcal.nmt.edu/scheduledetails/exptnumb/201525 Continuous recording of Thumper signals in the Sevilleta Wilderness Area. North Texas Earthquake Study http://www.passcal.nmt.edu/scheduledetails/exptnumb/201519 Recording earthquakes in North Texas in order to refine the locations and depths. All data to be immediately open. Waves-2 http://www.passcal.nmt.edu/scheduledetails/exptnumb/201561 We are trying to measure the coherent (hopefully) ambient noise wave field that's produced by breaking waves in the surf zone. 2015 IAS http://www.passcal.nmt.edu/scheduledetails/exptnumb/201506 Imaging the Socorro Fault. Peru Hydrology http://www.passcal.nmt.edu/scheduledetails/exptnumb/201526 As the tropical alpine glaciers of the world are melting due to climate change sensitivity, there is an increased strain on water resources that are provided by seasonal glacial melt water. The Rio Santa in Peru currently flows regularly year-round, despite the six months of the year in which there is very little precipitation. This river is the source of water for agricultural, industrial, and personal use, as well as hydroelectric power generation, for a large portion of Peruvian population that occupies the surrounding watershed. As the glaciers of the Cordillera Blanca disappear (and many will be completely gone within decades), the dry season discharge of the alpine streams will be reduced. In order to understand the groundwater storage capacity of the surrounding valleys, we will be conducting seismic refraction surveys in the high alpine valleys, especially focused on the structure of buried talus and rock slide deposits, potential storage aquifers that can release water slowly throughout the year. The geophysical surveys will serve to better understand groundwater storage capacity and residence time in the watershed, and will be used to inform a predictive groundwater model involving the storage of precipitation in the absence of glaciers. LaMa http://www.passcal.nmt.edu/scheduledetails/exptnumb/201507 Deploy 30 PASSCAL broadband stations in late 2015 or early 2016 for approximately 18 months to complement 12 UW broadband stations that will be deployed in late 2014 or early 2015, subject to the NSF IES project being funded. The project goal is to image the magma chamber beneath the Laguna del Maule volcanic center. Laguna del Maule has the potential to become the site of a caldera-forming eruption. Lehigh EES Instruction http://www.passcal.nmt.edu/scheduledetails/exptnumb/201558 Requesting GEODE, cables, geophones, and laptop for geophysics instruction RAMP1 http://www.passcal.nmt.edu/scheduledetails/exptnumb/201520 We will be completing seismic surveys over a known relay ramp in the Alvord Basin along with ground temperature surveys aimed at characterizing heat flow in active geothermal areas. SJFZ_SAF http://www.passcal.nmt.edu/scheduledetails/exptnumb/201512 The San Jacinto fault zone is the most seismically-active branch of the San Andreas system in southern California, with accelerated activity of M5+ events in recent years. We propose integrated multi-scale multi-signal studies of spatio-temporal variations of earthquake sources, geodetic motion, rock properties, stresses and fluids within and around the SJFZ, deformation of its ductile root, geometry of the underlying Moho, and lateral connections to the San Andreas fault. The studies will provide fundamental quantitative information on the system behavior of a major branch of the plate-boundary in southern California having high current seismic hazard. The project will augment excellent regional and local infrastructure with key seismic, geodetic, and magneto-telluric observations aiming to provide state-of-the-art knowledge on coupled evolution of earthquakes and fault zone properties. Rupture-meters consisting of creep meters and accelerometers will span several fault sections where large events are expected. We will develop a detailed structural model integrating scales ranging from interfaces and damage zones comprising the internal fault zone structure to the regional plate-boundary framework and the underlying ductile substrate. The model will be derived using joint analyses of travel time and waveform tomography of local earthquakes, ambient seismic noise, fault zone head and trapped waves, seismic anisotropy and attenuation, magneto telluric data, receiver functions, and additional analyses of reflected/transmitted phases from prominent horizontal and vertical interfaces. The structural model will be linked to geodetic data characterizing the steady and transient strain fields, locking depths, and deformation in the downward continuation of different fault sections. The various types of geophysical data will provide, in conjunction with theoretical analyses, strong constraints on the stresses, fluids, and effective rheology. Accurate local and regional seismicity catalogs will be used to characterize geometrical properties of all seismically active volumes and evolutionary seismicity patterns. The project will establish a unique natural laboratory for studying connections between the SAF and SJFZ, processes and conditions preceding M>7 type events on a continental transform fault, and co- and post-seismic fields associated with such an earthquake if/when it occurs (we intend to leave as many instruments as possible in the field beyond the project duration by integrating them into existing networks). The research will phase in over five years, will leverage UNAVCO resources and related collaborations to be cost-effective, and will complement studies by other investigators focusing on other major fault zones. CWU Seismology http://www.passcal.nmt.edu/scheduledetails/exptnumb/201515 Graduate Level Seismology Class Laboratory Component