Halley, California

The same ground, surveyed 84 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.

1915 1999

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.

• 1915 USGS Westley quadrangle1:31680, 3 printings
• 1941 USGS Modesto West quadrangle1:62500, 3 printings
• 1947 USGS San Jose quadrangle1:250000
• 1952 USGS Westley quadrangle1:24000
• 1956 USGS San Jose quadrangle1:250000
• 1962 USGS San Jose quadrangle1:250000, 4 printings
• 1966 USGS San Jose quadrangle1:250000
• 1969 USGS Westley quadrangle1:24000, 2 printings
• 1989 USGS Stockton quadrangle1:100000, 2 printings
• 1991 USGS Westley quadrangle1:24000
• 1999 USGS Westley quadrangle1:24000

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 165 fires within 5 miles of Halley (historical) between 1992 and 2019, burning about 5,272 acres in total. None started naturally. 10 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:

• Solyo
• Grayson
• Westley
• Ohm
• Tuolumne City (historical)

Every fire recorded in Stanislaus County

Regional context, not property-specific evidence. The federal mineral resources record lists 4 workings within 5 miles of Halley (historical): 2 occurrences, 2 unknowns. None of them still produces. What was taken out: Sand and Gravel, Construction, Stone, Dimension, Limestone, General. 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 Stanislaus County

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

This settlement is recorded in the Geographic Names Information System as feature 1702960. 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.