Earthquake causes sewer to collapse.  The biggest earthquake ever recored was in Deerfield, Kansas. An earthquake is the shaking of the ground caused by an abrupt shift of rock along a fracture in the Earth, called a fault. Within seconds, an earthquake releases stress that has slowly accumulated within the rock, sometimes over hundreds of years. Says CVO website (www.CVO.com) . Magnitude is a measure of the amount of energy released during an earthquake, and you've probably heard news reports about earthquake magnitudes measured using the Richter scale. The Richter scale was invented, logically enough, in the 1930s by Dr. Charles Richter, a seismologist at the California Institute of Technology.  Says New Mexico Bureau of geology and mineral Resources.

 

 

picture of charles richter and the first model of the richter scale. this is a picture of a earthquake in the ocean.this is a picture of 2006 JAC weekly DVOA performence.

 

 

 

 

 

 

 

 

 

 

 

this shows the magnitude of earthquakes on the coast of colmbia and where earthquakes mostly occur.

 

 

 

 

 

 

 

 

 

 

This is a 24-hour long seismic record.
Time progress left to right and from top to bottom, just like text on a printed page.
Each line is 15 minutes long.
The hour marks are visible as a vertical stripe parallel to the left edge of the record.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This great earthquake and ensuing tsunami took 128 lives (tsunami 113, earthquake 15), and caused about $311 million in property loss. Earthquake effects were heavy in many towns, including Anchorage, Chitina, Glennallen, Homer, Hope, Kasilof, Kenai, Kodiak, Moose Pass, Portage, Seldovia, Seward, Sterling, Valdez, Wasilla, and Whittier.

 

 

Anchorage, about 120 kilometers northwest of the epicenter, sustained the most severe damage to property. About 30 blocks of dwellings and commercial buildings were damaged or destroyed in the downtown area. The J.C. Penny Company building was damaged beyond repair; the Four Seasons apartment building, a new six-story structure, collapsed; and many other multistory buildings were damaged heavily. The schools in Anchorage were almost devastated. The Government Hill Grade School, sitting astride a huge landslide, was almost a total loss. Anchorage High School and Denali Grade School were damaged severely. Duration of the shock was estimated at 3 minutes.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The earthquake was accompanied by vertical displacement over an area of about 520,000 square kilometers. The major area of uplift trended northeast from southern Kodiak Island to Price William Sound and trended east-west to the east of the sound. Vertical displacements ranged from about 11.5 meters of uplift to 2.3 meters of subsidence relative to sea level. Off the southwest end of Montague Island, there was absolute vertical displacement of about 13 - 15 meters. Uplift also occurred along the extreme southeast coast of Kodiak Island, Sitkalidak Island, and over part or all of Sitkinak Island. This zone of subsidence covered about 285,000 square kilometers, including the north and west parts of Prince William Sound, the west part of the Chugach Mountains, most of Kenai Peninsula, and almost all the Kodiak Island group.

 

 

 

 

 

Five-story J.C. Penney Building, 5th Avenue and Downing Street, Anchorage, Alaska, partly collapsed by the March 28, 1964 earthquake. Note undamaged buildings nearby.

 

 

 

 

 

Landslide and slumping effects in the Turnagain Heights area, Anchorage, Alaska, caused by the March 28, 1964, earthquake.

 

 

 

 

 

This shock generated a tsunami that devasted many towns along the Gulf of Alaska, and left serious damage at Alberni and Port Alberni, Canada, along the West Coast of the United States (15 killed), and in Hawaii. The maximum wave height recorded was 67 meters at Valdez Inlet. Seiche action in rivers, lakes, bayous, and protected harbors and waterways along the Gulf Coast of Louisiana and Texas caused minor damage. It was also recorded on tide gages in Cuba and Puerto Rico.

This great earthquake was felt over a large area of Alaska and in parts of western Yukon Territory and British Columbia, Canada.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 this  is a picture of what happend after a earthquake happend.

 

 

 

 

 

 

 

 

 

 

 

 

 this is a picture of the san andreas fault. One of the words most active fault line in the world this is in California.

 

 

 

 

this is a picture of a famliy after a earthquake in South Asia. This famliy lost everything they owned. What they are living in right now is whats left of their house. They are sleeping under whats left of the roof.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Early Saturday morning an earthquake measuring 7.6 struck, and affected Pakistan, India and surrounding countries. It is now reported that over 30,000 people are feared dead, with tens of thousands injured and an un-estimated number displaced.  Entire villages in the North West Frontier Province (NWFP) and Pakistan-administered Kashmir, also known as Azaad Jammu and Kashmir (AJK), are said to have been destroyed or severely damaged.  Large-scale destruction of homes and schools are reported from areas in NWFP and AJK (see map of earthquake impact on the right).  Numerous aftershocks have continued to hit the affected region since Saturday morning’s earthquake. It has been immediately evident that the situation in India also represents a substantial operation. An initial assessment from Save the Children in India found heavy casualties, especially in the two most affected districts of Baramulla and Kupwara.

It is very clear that there is a great need for shelter and food on a large scale. Governments in the region are appealing for international assistance. As winter fast approaches the affected mountainous region, timely provision of assistance becomes even more critical.  Medical supplies and support are needed as the injured begin to trickle out of the worst-hit areas.  Migration of displaced populations has begun with reports of families packing their belongings and thousands moving by foot out of the worst affected areas.

As in most disasters, children are severely affected. The earthquake struck as the Saturday morning session of school was underway and many children and their teachers died in collapsed buildings. Towns and villages are speaking of a ‘lost generation.’ Children who survived or were not at school have lost family members and have been separated from their families; they have sustained injuries that require short and long term treatment; they have lost friends and play spaces, as well as access to education and health (http://www.savethechildren.org.au/australia/what_we_do_programs/emergencies/earthquake_south_asia.html)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Earthquakes in the San Francisco Bay Region result from strain energy constantly accumulating across the region because of the northwestward motion of the Pacific Plate relative to the North American Plate (Figure 1 ). The region experienced large and destructive earthquakes in 1838, 1868, 1906, and 1989, and future large earthquakes to relieve this continually accumulating strain are a certainty. For our study we define the SFBR as extending from Healdsburg on the northwest to Salinas on the southeast.  It encloses the entire metropolitan area, including its most rapidly expanding urban and suburban areas. We have used the term "major" earthquake as one with M>=6.7 (where M is moment magnitude). As experience from recent earthquakes in Northridge, California (M6.7, 1994, 20 killed, $20B in direct losses) and Kobe, Japan (M6.9, 1995, 5500 killed, $147B in direct losses), earthquakes of this size can have a profound impact on the social and economic fabric of densely urbanized areas. (says http://earthquake.usgs.gov/regional/nca/wg02/index.php)

 

 

 

 

Faults and plate motions in the San Francisco Bay Region. Faults in the region, principally the seven faults shown here and characterized in this report, accommodate about 40 mm/yr of mostly strike-slip motion between the Pacific and North American tectonic plates. Yellow lines show the locations of the 1868 M6.8 earthquake on the southern portion of the Hayward Fault and the 1989 M6.9 Loma Prieta earthquake near the San Andreas fault northeast of Monterey Bay (says http://earthquake.usgs.gov/regional/nca/wg02/index.php)