Mount Wilson, California

The same ground, surveyed 101 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.

1894 1995

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.

• 1894 USGS Los Angeles quadrangle1:62500
• 1896 USGS Pasadena quadrangle1:62500, 2 printings
• 1900 USGS Los Angeles quadrangle1:62500, 4 printings
• 1900 USGS Pasadena quadrangle1:62500, 10 printings
• 1901 USGS Southern California Sheet No. 1 quadrangle1:250000, 6 printings
• 1904 USGS Southern California Sheet No. 1 quadrangle1:250000, 2 printings
• 1934 USGS Mt. Wilson quadrangle1:24000
• 1939 USGS Mt. Wilson quadrangle1:24000, 4 printings
• 1949 USGS Los Angeles quadrangle1:250000, 2 printings
• 1953 USGS Mt. Wilson quadrangle1:24000, 3 printings
• 1955 USGS Los Angeles quadrangle1:250000
• 1959 USGS Los Angeles quadrangle1:250000, 3 printings
• 1966 USGS Los Angeles quadrangle1:250000
• 1966 USGS Mt. Wilson quadrangle1:24000, 4 printings
• 1975 USGS Los Angeles quadrangle1:250000, 2 printings
• 1979 USGS Los Angeles quadrangle1:100000
• 1995 USGS Mount Wilson quadrangle1:24000

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 181 fires within 5 miles of Mount Wilson between 1992 and 2020, burning about 7,333 acres in total. 11 started naturally. 29 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:

• Kinneloa Mesa
• Sierra Madre
• Altadena
• Chapman
• Santa Anita
• Arcadia

Every fire recorded in Los Angeles County

Regional context, not property-specific evidence. The federal mineral resources record lists 8 workings within 5 miles of Mount Wilson: 4 occurrences, 3 past producers, 1 producer. 1 still produces. What was taken out: Gold, Sand and Gravel, Construction, Molybdenum, Gold, Silver, Copper, Molybdenum. 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 Los Angeles 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 1661072. 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.