Here are some of the articles that have been recently posted to the PASSCAL website:

Polar Programs

 

PASSCAL currently supports approximately 60 experiments per year worldwide, with 5-10% currently funded by the National Science Foundation (NSF) Office of Polar Programs (OPP). Polar projects commonly require a level of support that is several times that of seismic experiments in less demanding environments inclusive of very remote deployments (e.g. Tibet). In order to ensure OPP funded Antarctic projects the highest level of success, we have established a PASSCAL Polar Program and have secured funds from OPP to support new and ongoing experiments in Antarctica.

The primary focus of PASSCAL’s Polar support efforts are:

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Governing Policies

A variety of policies govern the use of EPIC and EarthScope Flexible Array equipment, and the support provided by the EPIC. These policies are vetted by the EPIC Standing Committee and the USArray Advisory Committee (see http://www.iris.edu/hq/about_iris/governance for more information about EarthScope govenance and committee membership and charge). Links to EPIC policies are listed below:

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List of PASSOFT Applications

The 24 applications provided in the latest PASSOFT installation include the following.

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PH5: What is it?

 

 

PH5 is the recommended archival format for active source data sets.  EPIC has transitioned from SEG-Y to PH5, EPIC's implementation of the hierarchical data format, version 5 (HDF5) data model, as the preferred archival format for active source data sets.  The strengths of HDF5 made it an attractive model for an active source archival data format.

HDF5:

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Bighorn Arch Seismic Experiment: Results

In 2010, a group of seismologists deployed several hundred sensors across Wyoming and Montana as part of EarthScope's Bighorn Project and the Bighorn Arch Seismic Experiment (BASE). EarthScope/EPIC supplied instruments and expertise as part of this large effort, which included scientists from CIRES at University of Colorado Boulder(1), the Department of Geology at Colorado College(2), the Department of Geology and Geophysics at the University of Wyoming(3), and the Department of Geology and Geophysics at Texas A&M University(4). The Principal Investigators included Anne F. Sheehan(1), Megan L. Anderson(2), Eric A. Erslev(3), Kate C. Miller(4), and Christine S. Siddoway(2). William L. Yeck(1), the lead graduate student from UC Boulder, provided analysis and support included in this article. Additionally, numerous students contributed to the effort. The team's recent publication, "Structure of the Bighorn Mountain region, Wyoming, from teleseismic receiver function analysis: Implications for the kinematics of Laramide shortening," is available from AGU Publications (Full, PDF).

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Ensemble Cast Supports Socorro Magma Body Experiment

During February 2015, EPIC staff assisted Principal Investigators Sue Bilek, Rick Aster, Brandon Schmandt, and Lindsay Worthington with the installation of numerous single-channel nodes in conjunction with seven EPIC broadband stations (data) to image the Socorro Magma Body (SMB) beneath the Sevilleta National Wildlife Refuge in central New Mexico. 

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Sercel L-22 Short Period Sensor

Salient Features: This 3-channel sensor has a frequency of 2.0Hz, damping of 0.707 critical and sensitivity of 88V/m/s. Best used for (but not limited to) measuring local earthquakes, teleseisms, and some active source. Types of Projects include: determination of site response, determination of crustal structure, volcanic studies, aftershock studies, and glacial studies. Manufacturer Documents:

Link to Sercel seismometer page

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Programming RT130's

The RT130 can be configured using any PalmOS device that has a serial interface and the program PFC-130, but the EPIC exclusively uses and provides Sony Cliés.

 

The following is an example outline of an RT130 configuration using the PFC-130 program. The outline is intended as a quick reference guide only and is not a substitute for training or reading the official manufacturer's manual. For detailed information on programming the RT130 using PFC-130, consult the manufacturer's RT130 information page and brochure.

PFC-130 Quick Reference Guide to Programming

Note: Items marked with * are information that will be written to the log file, but will not affect the operation of the RT130.

Sercel L-28-3D High Frequency Sensor

  Salient Features:  This 3-channel sensor has a frequency of 4.5Hz, is critically damped at .707 and has a sensitivity of 30.4 V/m/s.  Used for (but not limited to) active source (land and off-shore excitations), glacial movements, local earthquake and aftershock studies. Manufacturer Documents  http://www.sercel.com/products/Lists/ProductSpecification/Geophones_brochure_Sercel_EN.pdf

Download the Brochure to obtain information about the L-28 geophones.

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