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

EPIC Posters at 2014 EarthScope Workshop, June 8-11, in Sunriver, Oregon

There will be several presentations by EPIC staff at the 2014 EarthScope Workshop, June 8-11, in Sunriver, Oregon.  If you can't see these posters in person in Oregon, have a look at them via the links below.

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EarthScope EPIC Supports Fluvial Seismology Research in Grand Canyon

When and how do rivers transport sediment from eroding landscapes? New research by Brandon Schmandt and Karl Karlstrom of the University of New Mexico and Rick Aster of New Mexico Tech is shedding light on how seismology can address this fundamental problem. The EPIC provided several quick-deploy stations from its RAMP (Rapid Array Mobilization Program) pool in support of this innovative project. The panoramic view of the Grand Canyon above was taken during a December 2012 data recovery trip.

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EarthScope/EPIC Intern Cuts Her Teeth on TESGM Project Fieldwork

EarthScope/EPIC summer intern Jennifer Tarnowski is learning the ropes of a seismology career by working at the EPIC at New Mexico Tech, and also by participating with hands-on efforts in the field.  Jennifer recently participated in fieldwork supporting the Topographic Effects in Strong Ground Motion project (TESGM, EPIC project 201109) in early July, along with principal investigators Brady Cox,  University of Arkansas, Adrian Rodriguez-Marek, Virginia Tech., graduate student Clinton Wood, University of Arkansas, Robert Kent of the Network for Earthquake Engineering Simulation (NEES), and Steve Azevedo, EarthScope/EPIC.

Batholiths Onland 2009

In July 2009, several EarthScope/EPIC scientists assisted with the Batholiths Onland project. This large group effort involved over 50 scientists and grad students, for the purpose of making "a seismic refraction and wide-angle reflection survey across the Coast Mountains batholith of British Columbia, Canada."

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Short-Period Sensors

EPIC Short-period Sensors: Sercel  L-22 Guralp CMG-40T-1 Features:

Short-period sensors are rugged three-component seismometers that cover the frequency band from 1 Hz to 100 Hz. These sensors are used in both passive and active-source experiments. EPIC's short-period sensors can be either feedback seismometers requiring power or conventional, passive seismometers requiring no external power.

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EPIC Obtains New Automated Seismic Source

EPIC has purchased its first fully automated seismic source, a Propelled Energy Generator, model: PEG-40Kg manufactured by R.T. Clark Companies, Inc. The system is light weight, and highly portable, and is designed to easily mount onto a truck or SUV hitch. Seismic energy is produced when  a large hammer mass weight is propelled by an elastomer band (i.e. a very large rubber band) onto an impact plate, producing an impact frequency range of 10-250Hz. The source is controlled with a hand held motor controller,  and can operate in single cycle or continuous cycle mode. The device is powered by a 12V large capacity battery (car battery).  The PEG-40Kg was received, assembled, and field-tested by  EPIC staff on June 23rd-28th, 2011.

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EarthScope/EPIC Dedicates Seismometer Testing Observatory to Jim Fowler

On March 28th, 2012, a beautiful Spring day, staff from the EarthScope/EPIC, Incorporated Research Institutions for Seismology (EarthScope), US Geological Survey, Sandia National Labs, and students assembled for the surprise dedication of the EarthScope/EPIC seismometer testing vault to Jim Fowler, founding Program Manager for EarthScope/EPIC (see "EarthScope/EPIC Celebrates Career of Jim Fowler", March 9th, 2012).

Before a large gathering of more than 75 people, Bob Woodward, EarthScope Director for Instrumentation Services emceed a series of speakers that included Rick Aster of NMT/EES and David Simpson, President of EarthScope.  David Simpson presented Jim's wife, Cynthia, with a bouquet of flowers in recognition for her contribution during Jim's 25 years of service.  Jim was then invited to the podium, where he thanked the staff of EarthScope/EPIC and EarthScope for "the easiest job he has ever had."

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Solar Equipment

Solar panels are used to produce the power to charge batteries needed to run a station.  The number and size of solar panels needed will depend on the amount of sunlight available at the site and the power draw of the station.  For stations at low to mid latitudes and at least moderate sun we recommend a power ratio of at least 20 to 1.  That is if the station draws 1 watt of power you need at least 20 watts of solar panel.  The Battery Usage Calculator  is helpful in determining power usage for stations.  To get the most power the solar panels need to be oriented to receive the maximum amount of sunlight using solar panel mounts.

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