( 1908 )-Available online at this USGS webpage.

* The Parkfield, California, Earthquake Experiment at the USGS

* San Andreas Fault at Wallace Creek — Kite Aerial Photography from the USGS

The USGS also publishes 1: 100, 000 maps covering 30 minutes latitude by one degree longitude, 1: 250, 000 covering one by two degrees, and state maps at 1: 500, 000 with California, Michigan and Montana needing two sheets while Texas has four.

Image: Mount Marcy New York USGS topo map 1892. jpg | The Mount Marcy area of New York State in 1892 in a 15 minute quadrangle at 1: 62, 500.

Image: Mount Marcy New York USGS topo map 1979. JPG | The same area about a century later ( 1979 ) in a 7. 5 by 15 minute metric map at 1: 25, 000.

In other areas USGS digital map revisions may omit geographic features such as ruins, mine locations, springs, wells, and even trails in an effort to protect natural resources and the public at large, or because such features are not present in any public domain database.

The USGS stream gauge ( NWS identifier AUSG1 ) at Lithia Springs is considered to be " near Austell " by the National Weather Service, however, even though that city is further away and in Cobb and not Douglas.

According to the USGS Bostonia is located at ( 32. 8075509 ,-116. 9364153 ).

According to the USGS it is located at ( 32. 8072739-116. 8680800 ).

According to the United States Census Bureau Crest is located at ( 32. 805918 ,-116. 867405 ), approximately 500 feet to the southeast of the USGS location.

According to the USGS, Granite Hills is located at

According to the United States Geological Survey ( USGS ) Harbison Canyon is located at ( 32. 8203296 ,-116. 8300236 ), which is near the intersection of Harbison Canyon Road and Frances Drive.

The United States Geological Survey ( USGS ) places Spring Valley at ( 32. 7447740 ,-116. 9989160 ).

The United States Census Bureau places Spring Valley at ( 32. 734318 ,-116. 981372 ), which is approximately two miles southeast of where the USGS places it.

* Kerr Hill is identified as a populated place by the USGS GNIS at.

A USGS survey marker at the old Haywood County Courthouse in downtown Waynesville lists the elevation as above sea level.

* Other references embedded as external links include: Crary memoir, snowfall data, fossil evidence, USGS place names and locations, text of presidential speech at Lake Farmpark, April 15, 2005.

* Great Egret at the USGS

* Aerial view of the San Andreas fault in the Carrizo Plain, Central California, from " How Earthquakes Happen " at USGS

" at USGS

Seismic activity is monitored by the USGS Cascades Volcano Observatory located in Vancouver, Washington, which issues weekly updates ( or daily updates when significant eruptive activity is occurring at a Cascades volcano ).

* Northern Shoveler at USGS Patuxent Bird Identification InfoCenter

* Charles Richter interview, at USGS

Unfazed, Brady subsequently revised his forecast, stating there would be at least three earthquakes on or about July 6, August 18 and September 24, 1981, leading one USGS official to complain: " If he is allowed to continue to play this game ... he will eventually get a hit and his theories will be considered valid by many.

USGS map colored by Paleogeology | paleogeological areas and demarcating the sections of the U. S physiographic regions: Laurentian Upland ( area 1 ), Atlantic Plain ( 2-3 ), Appalachian Mountains | Appalachian Highlands ( 4-10 ), Interior Plains ( 11-13 ), Interior Highlands ( 14-15 ), Geography of the United States Rocky Mountain System | Rocky Mountain System ( 16-19 ), Intermontane Plateaus ( 20-22 ), & Pacific Mountain System ( 23-25 )

* Topographic map of Marquette Mountain from USGS via Microsoft Research Maps

The Geographic Names Index System ( GNIS ) of the USGS indicates that the official name of this feature is Magazine Mountain, not " Mount Magazine ".

According to the USGS, the Cumberland Mountain range is long and wide, bounded by the Russell Fork on the northeast, the Pound River and Powell River on the southeast, Cove Creek on the southwest, and Tackett Creek, the Cumberland River, Poor Fork Cumberland River, and Elkhorn Creek on the northwest.

Flowing around Stoney Mountain, the Alsea River receives Bear Creek and Lake Creek from the left, passes Blackberry Campground on the left, receives Grass Creek and Brush Creek from the left and Schoolhouse Creek from the right, passes Mike Bauer Picnic Grounds on the right and, shortly thereafter, a USGS gauging station on the right from the mouth.

The USGS GNIS defines the range with a simple list seven points in a line, running from approximately Paddy-Go-Easy Pass and Granite Mountain to approximately Blewett Pass and Naneum Creek.

According to the USGS GNIS, the state of Alaska in the United States has 10 peaks named Bear Mountain:

According to the USGS GNIS, the state of Colorado in the United States has 10 peaks named Bear Mountain:

According to the USGS GNIS, the state of Maine in the United States has 11 peaks named Bear Mountain:

According to the USGS GNIS, the state of New York in the United States has 11 peaks named Bear Mountain.

According to the USGS GNIS, the state of Washington in the United States has 9 peaks named Bear Mountain:

According to the USGS, variant names of Catoctin Mountain include Kittochiny Mountains, Kittockton Mountain, Kittocton Mountain, and South Mountain.

* Delaware River Valley and Kittatinny Mountain Region at USGS

* USGS Photo Glossary: Fumarole

Helium is the second lightest element and is the second most abundant element in the observable universe, being present at about 24 % of the total elemental mass, which is more than 12 times the mass of all the heavier elements combined.

The government of the United States set up the National Helium Reserve in 1925 at Amarillo, Texas, with the goal of supplying military airships in time of war and commercial airships in peacetime.

Helium has a negative Joule-Thomson coefficient at normal ambient temperatures, meaning it heats up when allowed to freely expand.

* Helium at the Helsinki University of Technology ; includes pressure-temperature phase diagrams for helium-3 and helium-4

Helium four is only solid at pressures above 25 bar.

But Dalton and other chemists of the time had not considered that some elements occur in monatomic form ( like Helium ) and others in diatomic form ( like Hydrogen ), or that water was H < sub > 2 </ sub > O, not the simpler and more intuitive HO — thus the atomic weights presented at the time were varied and often incorrect.

He tried to liquefy the last remaining gas, Helium, which condenses into a liquid at − 268. 9 ° C, but owing to a number of factors, including a lack of Helium with which to work, Dewar was preceded by Heike Kamerlingh Onnes as the first person to produce liquid helium, in 1908.

Helium did not have any practical applications at the time, but by 1917 the federal government was sponsoring extensive research into the possibility of using helium in airships.

The primordial helium in the universe experienced the same phase changes, but at different points in the history of the universe, and is usually referred to as Helium reionization.

Born in Montreal, Reeves obtained a BSc degree in physics from the Université de Montréal in 1953, an MSc degree at McGill University in 1955 ( with a thesis entitled " Formation of Positronium in Hydrogen and Helium " and then a PhD degree at Cornell University ( Ithaca, New York ) in 1960.

Helium at pressures in the 10 to 30 bar range is the working fluid.

Helium mixes may be made by partial pressure blending, mass fraction blending or compressing a premix blended at atmospheric pressure ( continuous blending ).

Helium analyzers also exist, although they are expensive at present, which allow the Trimix diver to find out the proportion of helium in the mix.

When partial pressure or mass blending is done at low flow rates the gases entering the cylinder are not moving fast enough to ensure good mixing, and particularly when blends contain Helium, they may tend to remain in layers due to density differences.

The Helium – neon or HeNe laser can be made to oscillate at over 160 different wavelengths by adjusting the cavity Q to peak at the desired wavelength.

Helium at high pressures produces nervous irritation (" anti-anaesthesia "), suggesting that the anaesthetic mechanism ( s ) may be operated in reverse by this gas ( i. e., nerve membrane compression ).

at: 7500000000 frompos: 60 tillpos: 71 width: 0. 5 color: teal # Helium flash

* Helium Cadmium, Blue laser emission at 442 nm and Ultraviolet at 325 nm