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120th Meridian West

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Title: 120th Meridian West  
Author: World Heritage Encyclopedia
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Subject: Pacific Time Zone, Index of Canada-related articles, Index of California-related articles, Geographical coordinates, 58th parallel south
Publisher: World Heritage Encyclopedia

120th Meridian West

Line across the Earth
120th meridian west
The 120th meridian defines part of the border between British Columbia and Alberta in Canada, and approximately defines part of the border between California and Nevada in the United States.

The meridian 120° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, North America, the Pacific Ocean, the Southern Ocean, and Antarctica to the South Pole.

The 120th meridian west forms a great circle with the 60th meridian east.

In Canada much of the border between British Columbia and Alberta is defined by the meridian, and in the United States part of the border between California and Nevada approximately follows it.

The mean solar time at this meridian determines the time for the Pacific Time Zone (UTC−08:00) during standard time. Most of the year however, it is the meridian for Alaska Daylight Time, as daylight saving time is observed for nearly 2/3 of the year.

From Pole to Pole

Starting at the North Pole and heading south to the South Pole, the 120th meridian west passes through:

Co-ordinates Country, territory or sea Notes
Arctic Ocean
 Canada Northwest TerritoriesPrince Patrick Island
M'Clure Strait
 Canada Northwest TerritoriesBanks Island
Prince of Wales Strait
Amundsen Gulf
 Canada Nunavut
Northwest Territories — passing through Great Bear Lake
British Columbia / Alberta border — from
British Columbia — from Intersection Mountain at ; at this point the meridian meets the Continental Divide, and the boundary with Alberta diverts southeast
 United States Washington
Oregon — from
California / Nevada border (approximate) — from
California — from
Pacific Ocean Santa Barbara Channel
 United States CaliforniaSanta Rosa Island
Pacific Ocean
Southern Ocean
Antarctica Unclaimed territory

See also

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