This is data from Phase II of the recording. Three component geophones were recorded at the surface, 300 m, 1.5 and 2.9 km in the Cajon Pass drillhole. The recording lasted from November, 1993 to August, 1995.
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.