Donated data 2020-637-DD

Identifier 2020-637-DD
Data provider Seismic data collected on land and donated by Carl Wentworth
Location Central California
Summary "A geophysical transect 140 km long, framed around two overlapping, 15 s reflection lines, extends from exposed Franciscan rocks in the Coast Ranges, across the Great Valley, and onto exposed Sierran granitic rocks. The reflection profiles were Collected using an 800-channel system that permitted both close group spacing (30 m) and long offset (12 km-0-12 km) (Zoback & Wentworth 1986). More than 500 km of associated refraction profiling were collected, using a system of 120 portable instruments, to supplement the pre-existing line in the Diablo Range. Interpretation involved two-dimensional ray tracing and some amplitude analysis. Adequate geologic maps and excellent gravity and magnetic surveys were already available for the region." From Carl M. Wentworth, Mark D. Zoback, Andrew Griscom, Robert C. Jachens, Walter D. Mooney Geophysical Journal International, Volume 89, Issue 1, April 1987, Pages 105–110
Info derived Seismic reflection profiles
on foot
walking survey, generally with GPS backpack
Start (port not specified) 1983-01-01
End (port not specified) 1983-12-31
West -121.5
East -119.75
North 37.5
South 37


USGS, Geology, Minerals, Energy, & Geophysics Science Center
Crew members
Information specialist(s)
Ray W Sliter
Specialist, Information

Data types and categories

Data category: Location-Elevation, Seismics
Data type: Navigation, Multichannel

Equipment used

Equipment Usage description Data types Datasets
GPS Navigation (no data reported)
vibroseis Multichannel (no data reported)
geophone Multichannel (no data reported)


Samples collected during this field activity