Extensometers

Vibrating-wire extensometer (RST Instruments, model EXSR-1300) data from two sensors that spanned the active earthflow margin, one (MX1049) approximately two meters away from the shear zone piezometer (SNAP) and the other (MX1048) is on the same shear margin, but 125 downhill. MX1048 is in line with the UNAVCO ORE2 GPS station, which is in the center of the earthflow. MX1049 is in line with the UNAVCO OREO GPS station, which is in the center of the earthflow. The extensometers were buried to a depth of 20 cm and the long axis was oriented as close to parallel to the strike of the slickensided shear zone as possible, with the flanges located diagonally across from one another. The folder below contains matlab processing scripts for the raw extensometer data.