Santa Susana Knolls, California

The same ground, surveyed 76 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.

1903 1979

Matched by testing this settlement's coordinate against the published boundary of every sheet in the United States Geological Survey's historical collection. Each opens the scanned sheet at the Survey.

• 1903 USGS Camulos quadrangle1:125000, 5 printings
• 1903 USGS Santa Susana quadrangle1:62500, 8 printings
• 1925 USGS Chatsworth quadrangle1:24000
• 1927 USGS Chatsworth quadrangle1:24000
• 1929 USGS Chatsworth quadrangle1:24000
• 1933 USGS Chatsworth quadrangle1:24000
• 1940 USGS Chatsworth quadrangle1:24000
• 1941 USGS Santa Susana quadrangle1:62500, 2 printings
• 1943 USGS Santa Susana quadrangle1:62500
• 1949 USGS Los Angeles quadrangle1:250000, 2 printings
• 1951 USGS Santa Susana quadrangle1:24000, 5 printings
• 1951 USGS Simi Valley East quadrangle1:24000
• 1955 USGS Los Angeles quadrangle1:250000
• 1959 USGS Los Angeles quadrangle1:250000, 3 printings
• 1966 USGS Los Angeles quadrangle1:250000
• 1975 USGS Los Angeles quadrangle1:250000, 2 printings
• 1979 USGS Los Angeles quadrangle1:100000

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 54 fires within 5 miles of Santa Susana Knolls between 2005 and 2020, burning about 136,831 acres in total. None started naturally. 3 were recorded as arson. Distance is straight-line from the map coordinates, so a fire counted here may appear on a neighbouring settlement's page as well.

The most recent of them, most recent first, with the day each was reported and the service that recorded it.

Settlements close enough to share some of these fires:

• Corriganville
• Santa Susana
• Chatsworth Lake Manor
• Community Center
• Simi Valley
• Moorpark

Every fire recorded in Ventura County

Regional context, not property-specific evidence. The federal mineral resources record lists 8 workings within 5 miles of Santa Susana Knolls: 7 past producers, 1 producer. 1 still produces. What was taken out: Stone, Dimension, Stone, Crushed/Broken, Flagstone, Stone. Distance is straight-line from the map coordinates, so a quarry counted here may appear on a neighbouring settlement's page as well.

Every working recorded in Ventura County

The eight closest, with where each one stands in the county. Distances are straight-line, computed from the Geographic Names Information System coordinates.

Matched on this settlement's Geographic Names Information System number rather than its name, so it cannot be a different place of the same name in another state.

This settlement is recorded in the Geographic Names Information System as feature 1661406. The sheet list is computed by point-in-boundary test against the United States Geological Survey's historical topographic inventory. Both are works of the United States government and carry no copyright under 17 U.S.C. 105.

Wildfire. Short, Karen C. 2022. Spatial wildfire occurrence data for the United States, 1992-2020 [FPA_FOD_20221014]. 6th Edition. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2013-0009.6 Collected with United States Government funding and usable without additional permissions or fees.

Mines and quarries. USGS Mineral Resources Data System (MRDS) https://mrdata.usgs.gov/mrds/ A work of the United States government, no copyright under 17 U.S.C. 105.