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

RefTek RT 130 Datalogger

The RT130 is a 3 or 6 channel high resolution datalogger. It is low power and highly configurable for a wide range of applications and sensors. It is housed in a plastic clamshell-style enclosure which is nearly waterproof and has internal data storage in the form of two compact flash cards. The RT130 can simultaneously record to the CF cards and transmit data in near-realtime using either ethernet or serial based telemetry. It has built-in sensor controls, scheduled mass recentering, and calibration functions. The RT130 is programmed with a PalmOS program called PFC-130 via the serial port.


PASSCAL Student Employees

Just who are those energetic students padding the halls of IRIS/PASSCAL? Here are our student interns and emergency hires.




Mia Cordova

Warehouse Lab Tech




Tyler Davis

Warehouse Lab Tech

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Mt. Erebus Volcano Observatory (MEVO) Experiment 2008-2009

Brian Bonnett installs a MEVO station.

The PASSCAL Polar Program supported MEVO experiment was a seismic refraction experiment designed to image the magma chamber of the Mt. Erebus volcano in Antarctica. The Principle Investigators (PI's) and primary researchers involved with this experiment were Dr. Phillip Kyle, Dr. Richard Aster, Dr. Catherine Snelson, Dr. Daria Zandomeneghi and Hunter Knox. The project was funded through a grant awarded to the PI's by the National Science Foundation Office of Polar Programs. A paper that discusses this experiment has been published in EOS, Transactions, American Geophysical Union entitled: “Seismic Tomography of Erebus Volcano, Antarctica” authored by Zandomeneghi et al. (See the end of the article for details.)

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Lodging Information

Links for hotel/motel, dining and travel options: 


Visit Socorro - Hotels and Lodging 

Trip Advisor

If you would like additional information or you require assistance in making arrangements, please feel free to contact our office at (575) 835-5070. Our business hours are M-F, 8:00am - 5:00pm MST.

Transportable Array


The Transportable Array (TA) is a gridwork of broadband seismic instruments that are being installed across the continental United States (see a map of TA stations that have been installed to date).  They are laid out in a rectangular array with approximately 75 kilometer spacing between stations stretching from Canada to Mexico and from the Pacific Ocean eastward.

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Station Enclosure Drawings

Station Enclosure Drawings   Large Enclosure:  Insulated Hardigg AL3434-2807 External dimensions:  37" x 37" x 37" Internal dimensions:  24" x 24" x 21" 2" thick vacuum insulation panel (VIP) sub-enclosure Protective polypropylene barrier between VIPs and electronics Integrated cable harness with external bulkhead connectors Year round operation with rechargeable AGM batteries   Detailed Drawings Hardigg AL3434-2807 Insulated:  Assembly Drawing with BOM

What was the Data Archiving Workshop all about?

PASSCAL provides a valuable service to the scientific community by loaning seismometers, data recorders, and other equipment to professional researchers. After the hardware installation and recovery for each experiment, the raw data are harvested from every recording disk. Sometimes there are thousands of them. The raw files are gathered and converted into standard forms called SEED or ph5 formats. The final phase of the research process, which all our users consent to when they request our equipment, is the submission of their data results for archiving at the IRIS Data Management Center. It is not always a straightforward conversion, especially for new users and students. That's when the PASSCAL Data Group steps in to help.

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PIC Workshop for Antelope and its Interfaces with Matlab and Python



Antelope Toolbox for Matlab (8MB) The Python Interface to Antelope (8MB) Automatic Event Location with Antelope (6MB) Generalized Event-driven Processing with Antelope (1MB) Seismic Array Processing with Antelope (1MB)

The motivation for this workshop was born in March of 2009 foreseeing the need for a broader understanding of antelope tools and its interfaces by PASSCAL staff and a group of researchers from New Mexico Tech (NMT).

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Passcalians Attend AGU Fall Meeting

The annual Fall Meeting of the American Geophysical Union is one of the largest and most interesting scientific conferences in the world. Some 15,000 scientists - from students to professional researchers, from small environmental analysis groups to huge government entities like NASA and NOAA - and a small troop from IRIS - gathered at the Moscone Center in downtown San Francisco for a week in mid-December 2009 to share their studies and recent results with each other, and with anyone curious enough to listen in.

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Batholiths Onland 2009

In July 2009, several IRIS/PASSCAL 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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