In the project we would like to use all 2100 Texans with vertical geophones to do a dense deployment across about 1/4 of the Shale Hills Critical Zone Observatory, which is located a few miles from Penn State University. Stations will be spaced 2 to 5 m apart. Hammer and shotgun sources will be used and spaced a few meters apart over the entire survey area. Shot timing will be provided by Verif-I gps synchronizers (Galen tells me that he has several). Shooting will be done in one day, with data being recorded continuously. The data will be used for a 3D P-wave tomography of the shallow subsurface. After collecting the active source data, the Texans will be redeployed to record ambient noise for a couple of days. Some of the Texans will also be used with 3-component (L-28s) sensors to collect a few dense 2D profiles for S-wave tomography after the 3D survey has been completed.
EarthScope Consortium operates the NSF National Geophysical Facility (NSF NGF).
Any opinions, findings and conclusions, or recommendations expressed in this
material do not necessarily reflect the views of the U.S. National Science
Foundation.
NSF SAGE Facility has been
certified as a trustworthy data repository
by the CoreTrustSeal Standards and Certification Board
