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Earthquakes are measured with the Richter Magnitude Scale developed by Charles F. Richter of California Institute of Technology in 1935. Here is a summary of the Richter scale:
Magnitude less than 3.5: Generally not felt, but recorded.
Magnitude 3.5-5.4: Often felt, but rarely causes damage.
Magnitude under 6.0: At most slight damage to well-designed buildings over small regions.
Magnitude 6.1-6.9: Can be destructive in areas up to 100 kilometers across where people live.
Magnitude 7.0-7.9: Major earthquake. Can cause serious damage over larger areas.
Magnitude 8 or greater: Great earthquake. Can cause serious damage in areas several hundred kilometers across.
Earthquakes are also measured by the Mercalli Intensity Scale which is a longer, more detailed scale. Both the Richter Scale and the Mercalli Scale can be seen on the U.S. Geological Survey website.

Source: United States Geological Survey.
 

The Saffir-Simpson scale measures the intensity of a hurricane. Wind speed is measured on a scale of 1-5 to give an estimate of potential property damage and flooding along the coast. The Categories are as follows:
Category One Hurricane: Winds 74-95 mph.
Category Two Hurricane: Winds 96-110 mph.
Category Three Hurricane: Winds 111-130 mph.
Category Four Hurricane: Winds 131-155 mph.
Category Five Hurricane: Winds greater than 155 mph.

Source: National Hurricane Center of the National Oceanic and Atmospheric Administration.
 

The Hurricane Research Division of the Atlantic Oceanographic and Meteorological Laboratory has listed these hurricanes in their Frequently Asked Question section.

Source: Atlantic Oceanographic and Meteorological Labortory
 

The Olympic Motto is Citius, Altius, Fortius.
This is Latin for Faster, Higher and Braver.

Source: World Almanac 1997, p.865. 
 

According to the International Olympic Committee, the five rings linked together represent the sporting friendship of all peoples. The rings also symbolize the five geographic areas of the world: Europe, Asia, Africa, Australia and the Americas.

Source: World Almanac 1997, p.867. 
 

 In the Northern Hemisphere, spring begins on the vernal equinox (also called the spring equinox), when daylight length (the interval between sunrise and sunset) is the same everywhere in the world (approximately 12 hours and 8 minutes). (In the Southern Hemisphere the autumnal equinox occurs on this same day.)

In the Northern Hemisphere, autumn begins on the autumnal equinox, when daylight length is the same everywhere in the world, again approximately 12 hours and 8 minutes (In the Southern Hemisphere, the spring equinox occurs on this same day).

Source: Chase's Calendar of Events 1998, pp. 176, 489
 

In the Northern Hemisphere, between the equator and the Arctic Circle, the winter solstice indicates the beginning of winter and occurs when the sun rises and sets on the horizon farthest south for the year, and daylight length is at a minimum, ranging from 12 hours and 8 minutes at the equator, to no sunlight at all at the Arctic Circle. (In the Southern Hemisphere the summer stolsice occurs on this same day.)
In the Northern Hemisphere, between the equator and the Arctic Circle, the summer solstice occurs when the sun rises and sets farthest north on the horizon for the year, and the length of daylight is maximum, ranging from 12 hours, 8 minutes at the equator to 24 hours at the Arctic Circle. (In the Southern Hemisphere, the winter solstice occurs on this same day.)

Source: Chase's Calendar of Events 1998, pp. 332, 619. 
 

Currently, Arizona, Hawaii, the eastern time zone portion of Indiana, Puerto Rico, the U.S. Virgin Islands and American Samoa do not observe Daylight Saving Time.

Source: World Almanac and Book of Facts 2005, p. 387.  California Energy Commission web site.
 

Shan Gray, an Edmond artist and youngest son of an Osage father and European-mix mother, is the designer of the proposed 21-story sculpture, called "The American".
The 217 foot monument made out of 350,000 pounds of bronze will sit on a four-story, limestone-concrete base, bringing the height to 21 stories that will be built to withstand an F3 tornado. At one time, the proposed site for the monument was Holmes Peak.  According to a KOTV report (4/17/12), the city of Sand Springs is interested in working with Gray. 
The sculpture depicts a young American Indian warrior with his hair being blown across his face. His right arm is raised as a bald eagle, wings spread, lands on his shroud-covered forearm.
Visitors will be able to ride an elevator to a platform in the sculpture's mid-section, where plasma television screens will project a 360-degree view from outside. From there, visitors can travel up to an observation area in the head.
According to the proposal, the sculpture will stand 5 feet taller than the Statue of Mother Russia in Volgograd, Russia, which claims to be the world's largest free-standing sculpture. It will be 60 feet taller than the Statue of Liberty.
The estimated $38 million monument will be privately funded, and once construction starts, it will take about 42 months to complete.
Source: KOTV online article, 4/17/12;  Sand Springs Leader, September 26, 2010, p.2; Tulsa World, October 18, 2008, p.A11; Tulsa World, January 13, 2008, p.A8; Tulsa World, April 25, 2007, p.A11. 
 

Go the USPS web site and click on the "Find a Locations" link. Type in your zip code, or, the zip code of the Post Office you wish to contact. Then, click on the "See More Results" link.  Choose the post office you wish to contact, click on the name, and the local phone number should appear.

Source: United States Postal Service web site
 

The coldest month in Tulsa is January, with an average daily high of 46 degrees and a low of 26 degrees Fahrenheit. The warmest month is July or August with an average daily high of 94 degrees and a low of 71 degrees Fahrenheit.
More information such as sunrise and sunset tables, daily temperatures (F6 link), rain fall, snow fall, and wind speeds for Tulsa can also be found at the National Weather Service - Tulsa web site.

Source: National Weather Service web site
 

Benjamin Franklin suggested people set their clocks ahead in the summer as far back as 1784. The first systematic use of Daylight Saving Time did not occur until the Germans began setting clocks ahead in World War I to conserve fuel. Soon, Britian and other Western European countries had also adopted "Summer Time."
The U.S. observed this time change nationwide in 1918 and 1919 and again in World War II from February 9, 1942, through September 30, 1945.
War times have been the only periods that Daylight Saving Time has been observed uniformly in this nation. Local ordinance or state legislation has determined its recognition otherwise.
In 1921 the entire state of Oklahoma was included in the Central Standard Time Zone. After World War II, "Summer Time" was not observed in Oklahoma. From September 30, 1945, through 1967, Daylight Saving again was not observed. In 1966, Congress passed the Uniform Time Act requiring that any state or U.S. territory wishing to observe Daylight Saving Time had to begin and end it on the same dates the federal government used--2 a.m. the first Sunday in April through 2 a.m. the last Sunday in October. Any state that did not take legal action went on Daylight Saving Time automatically. Therefore, on April 30, 1967, Oklahoma went on Daylight Saving Time and has remained so for the federally designated time period each year.

Source: Action Line, Tulsa World, November 1, 1999. 
Time Changes in the USA, 1966, by Doris Chase Doane.
 

According to the 1920 Tulsa City Directory, the address of the Drexel Building was 319 S. Main. This building is significant in Tulsa's history because according to the Tulsa Daily World, Wednesday, 6/1/1921, it was this building where Dick Rowland, a negro bootblack, was arrested for assaulting a white girl in an elevator. The Tulsa Race Riots broke out soon afterward.

Source: 1920 Tulsa City Directory 
 

USA - 308,745,539.
Oklahoma - 3,751,351.
Tulsa Metropolitan Statistical Area (MSA) - 937,478.
Tulsa County - 603,403.
Tulsa City - 391,906.
 

Source: US Census

USA - 281,421,906
Oklahoma - 3,450,654
Tulsa MSA - 842,920
Tulsa County - 563,299
Tulsa City - 393,049

Source:  US Census 
 

United States - 248,710,000.
Oklahoma - 3,146,000.
Tulsa Metropolitan Statistical Area (MSA) - 709,000.
Tulsa County - 503,300.
Tulsa City - 367,300.

Source:  Capital Improvements Plan: City of Tulsa, Oklahoma, 1997, p. 4. 
 

USA - 226,546,000.
Oklahoma - 3,025,300.
Tulsa MSA - 657,200.
Tulsa County - 470,600.
Tulsa City - 360,900.

Source: Capital Improvements Plan: City of Tulsa, Oklahoma, 1997, p. 4. 
 

USA - 203,302,000.
Oklahoma - 2,559,500.
Tulsa MSA - 525,900.
Tulsa County - 400,000.
Tulsa City - 330,400.

Source: Capital Improvements Plan: City of Tulsa, Oklahoma, 1997, p. 4. 
 

The following words are imbedded in the wall at the head of the staircase on the second floor of the Central Library and were written by American author, Clarence Day.  The Central Library opened in June 1965.

The World of Books…
Is the most remarkable creation of man
nothing else that he builds ever lasts
monuments fall
nations perish
civilizations grow old and die out
and after an era of darkness
new races build others
but in the world of books are volumes
that have seen this happen again and again
and yet live on
still young
still as fresh as the day they were written
still telling men’s hearts
of the hearts of men centuries dead.

Clarence Day
Dedicated June 1965

Source: Tulsa Tribune, May 22, 1965; Tulsa Tribune, June 29, 1965

Bixby - 20,884
Broken Arrow - 98,850
Collinsville - 5,606
Glenpool - 10,808
Jenks - 16,924
Owasso - 28,915
Sand Springs - 18,906
Skiatook - 7,397
Sperry - 1,206
Tulsa - 391,906
For additional Oklahoma demographic information, please search the Department of Commerce's website under - Data & Research, Demographic & Population Data.

Source: Oklahoma Department of Commerce, 2010 Census. Verified, 6/12. 
 

January 1 (Tuesday) - New Year's Day.
January 21 (3rd Monday in January) - Martin Luther King, Jr. Day.
February 12 (Tuesday) - Lincoln's Birthday.
February 17 (3rd Monday in February) - Washington's Birthday, or Presidents' Day, or Washington-Lincoln Day.
May 27 (last Monday in May) - Memorial Day, or Decoration Day.
July 4 (Thursday) - Independence Day.
September 2 (1st Monday in September) - Labor Day.
November 11 (Monday) - Veteran's Day.
November 28 (4th Thursday in November) - Thanksgiving.
December 25 (Wednesday) - Christmas Day.
In some states, the following will be legal or public holidays:
October 14 (2nd Monday in October) - Columbus Day, or Discoverers' Day, or Pioneers' Day.
November 5 (1st Tuesday after 1st Monday in November) - Election Day.
Source: Chase's Calendar of Events, p. 614.