California Fault Line Map
Thick red lines show the extent of historic ruptures. This new map is a reminder of california s quake risks.
California Fault Line California Fault Map Geology California
This updated map of california fault lines shows 50 new california surface faults.
California fault line map
. The red line on this map follows the surface trace of the san andreas fault across california. The arrows show the directions of relative motion along the fault. Skip to main content. Most californians live within 30 miles of an active fault 15 700 known faults in california and scientists continue to discover new ones select your county from the dropdown menu above or click on your county on the california map to the left to learn more about california earthquake risk and faults near you.For example the last napa valley quake in august 2014 has created new surface fault lines in california. Information available includes the age of the most recent activity on each fault segment surface rupture areas and whether or not the faults are visible at the surface. Click here to use the california fault activity map. However experts say the 800 mile fault which passes through much of california including the san francisco bay area is overdue for a major earthquake along with the 70 mile hayward fault that.
This updated map of california fault lines shows 50 new california surface faults. Bold numbers show the average time between big earthquakes determined at paleoseismic sites triangles. Because of its scale it cannot be used as an index of specific faults or fault. The california geological survey s interactive map allows users to identify the location and classification of faults throughout california.
This map is a progress report. Preliminary map of young faults in the united states as a guide to possible fault activity. Areas to the west left of the fault are part of the pacific tectonic plate. The san andreas fault is the sliding boundary between the pacific plate and the north american plate.
This map gives an overview of geologically young faults and is intended to help in evaluation of the potential activity of faulting nationally. Map of faults in southern california. These quake hazard regions have been discovered over the last two decades and will help educate the public and aid in planning and quake preparadness. Areas to the east right of the fault are on the north american tectonic plate.
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