California faults
The known active fault segments shown on the index map
came from Figure 25 of
USGS Open-File Report 96-532: "National Seismic Hazard
Maps, June 1996:
Documentation" by Arthur Frankel, Charles Mueller,
Theodore Barnhard, David
Perkins, E.V. Leyendecker, Nancy Dickman, Stanley Hanson,
and Margaret Hopper.
For northern California, the potential sources of earthquakes
larger than magnitude 6 are
documented in Open-File Report 96-705 by the Working Group
on Northern California
Earthquake Potential (chaired by Jim Lienkaemper).
For the state as a whole, see "Probabilistic seismic
hazard assessment for the State of
California" by Petersen, M. D., Bryant, W.A., Cramer,
C.H., Cao, T., Reichle, M.S.,
Frankel, A.D., Lienkaemper, J.J., McCrory, P.A., and Schwartz,
D.P, 1996 (California
Division of Mines and Geology Open-File Report 96-08; [published
jointly as] U.S.
Geological Survey Open-File Report 96-706).
The faults and fault zones described in these reports are
known to have been active in the last 2 million years and
are thought to pose a measurable hazard. For California
the faults on the individual zoomed-in and special maps
come from the three categories of faults believed to have
been active in the last 700,000 years shown on the "Preliminary
Fault Activity Map of California" by C.W. Jennings
(1992, California Division of Mines and Geology Open-File
Report 92-03). This map has been superseded by Jennings,
C.W., 1994, Fault activity map of California and adjacent
areas, with locations and ages of recent volcanic eruptions:
California Division of Mines and Geology, Geologic Data
Map No. 6, map scale 1:750,000.
Nevada faults
For Nevada, the faults on the individual zoomed-in and
special maps come from USGS Open-File Report 96-532 mentioned
above.
