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.

  How long will it take? Training at the PASSCAL Instrument Center takes an average of 2 days to cover a typical experiment.    The first day involves an overview from the PI, a discussion of proposed logistics, introduction or review of project instrumentation and a practice site installation.  The second day covers station servicing and demobilization, the PASSCAL suite of software for data download and review, and introduction or review of PASSCAL preferred database and data archiving procedures. What can you expect from us?  Training on the hardware that PASSCAL Instrument Center will provide for your experiment.  This will include the Digitizer, Sensor(s), Handheld controllers, and Power Systems.

Courtesy Jana Pursley, NMT

Seismicity in central New Mexico, southwestern United States, is dominated by earthquakes occurring above the mid-crustal Socorro Magma Body (SMB). The SMB is a sill-like feature ≥ 3400 km2 in area, with a top surface at 19-km depth spanning the inner Rio Grande rift half-graben system. Inflation of the magma body at rates of several mm/year, perhaps coupled with shallow transport of aqueous fluids, is the prevailing model for the region’s long-standing and anomalous seismicity. Clustered swarms of small magnitude earthquakes have been noted since the 1860s throughout this region, and have been recorded instrumentally since the early 1960’s (Figure 1, blue squares, Sanford et al., 20021).

PASSCAL Data Archiving Workshop San Francisco, California Gallery Room, Palomar Hotel December 13, 2009 Preliminary Agenda Agenda contents and schedule subject to change. updated 9/18/09

 
Morning Session: Passive-Source Processing and Data Archiving