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

USArray

The Flexible Array is a pool of portable seismic instruments supported by the Array Operations Facility at the PASSCAL Instrument Center. The instruments are available for PI-driven research projects associated with the goals of Earthscope. The pool consists of broadband (325), short-period (100), accelerometer (20), and controlled source (1700) stations. 

2009-12-22
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Poles and Zeroes

All poles and zeroes in radians/sec

2009-12-08
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Streckeisen STS-2 Broadband Sensor

Salient Features: Flat response to velocity from 120 seconds to about 10 Hz Low power Installation Tips: Example of STS-2/RT130 Setup One-pager field sheet

 Troubleshooting Tips: If you cannot center the masses of even one of the 3 elements of the STS-2, all your data could be compromised. The document provided here will guide you to a 'manual' process for attempting to get those masses centered, IF and ONLY IF the masses do not center after repeated (a dozen tries) centering commands.
2009-12-07
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Quanterra Q330

The Q330 is a 3 or 6 channel high resolution datalogger. It is low power and highly configurable for a wide range of applications and sensors. The Q330 is housed in a sealed aluminum enclosure which makes it highly resistant to the environment. Telemetry is a main focus of the Q330, but it also has a robust on-site data storage system which uses external Balers. This makes it easy to swap out the data storage on-site for when servicing doesn't allow an extended visit. The Q330 can write data to four different receiving systems simultaneously. It also has built-in sensor controls, an automatic mass recentering feature, and calibration functions. The Q330 is programmed with a Windows program called Willard, it can also be controlled by a PalmOS program for when working in the field.

Features:

2009-10-30
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Directions to PASSCAL

The PASSCAL Instrument Center is located in Socorro, New Mexico, on the New Mexico Tech campus.

IRIS Committee Members: find travel tips, expense report forms, and more here.

The NM Tech Earth & Environmental Science Department map page, which has information and links regarding public transit information between Albuquerque, Belen and Socorro, can be found here.

Learn more about Public Transportation between Socorro and Belen, including connections to Railrunner Service from Belen to Los Lunas, Albuquerque, or Santa Fe.

CONTACTS

PASSCAL: (575) 835-5070
Rick Aster: (575) 835-5924, 835-4596

GATE CLOSURES

Gate 1: open from 6am to 6pm
Gate 2: open from 4am to 10pm

2009-10-28
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Weather in New Mexico

The Weather Channel Local Forecast for Socorro
2009-10-26
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Visiting Socorro

2009-10-13
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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/Sensors/seismometers.php

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

2009-10-13
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40Hz High Frequency Sensor

Salient Features:

PASSCAL owns two types of 40Hz vertical geophones.

The 40Hz geophones for the Multichannel Digitizer Systems are manufactured by Sercel and Geospace.  These vertical geophones are critically damped at 0.555 and have a sensitivity of about 21 V/m/s. The 40Hz geophones for the Texan Digitizers these geophones are manufactured by Sercel.  These vertical geophones are critically damped at 0.555 and have a sensitivity of 35.3 V/m/s

Uses primarily include active source studies.

2009-10-13
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Array of Arrays: Elusive ETS in the Cascadia Subduction Zone

ETS, or 'episodic tremor and slip', is a recently discovered phenomenon in seismic research. Similar to earthquakes but much smaller in magnitude, ETS events are associated with the subduction zone of some convergent plate boundaries. One such region, the Cascadia subduction zone under the Puget Sound, is the focus of an experiment by Ken Creager's group at the University of Washington (UW), called Array of Arrays.

2009-10-01
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IRIS - Incorporated Research Institutions for Seismology New Mexico Institute of Mining and Technology
IRIS PASSCAL Instrument Center
New Mexico Tech
100 East Road, Socorro, NM 87801
Telephone (575) 835-5070
Fax (575) 835-5079