Magnitude 7.2 temblor caused by same tectonic shifts that created Baja Peninsula.
Published April 5, 2010
Centered on Mexico’s Laguna Salada Fault in Baja California, the earthquake was triggered by the same processes that drive temblors on the San Andreas Fault, which runs all the way from Southern California to north of San Francisco. (See a California map.)
“On the scale of the Earth, it’s all one fault zone: the plate boundary between the Pacific plate and the North American plate,” said Mark Benthien, communications director for the Southern California Earthquake Center in Los Angeles. (Find out more about plate tectonics.)
As the Pacific plate grinds northward against the western edge of the North American plate, most of the motion occurs along the San Andreas Fault. But the plate boundary doesn’t create a single, tidy fault line. (Related: “Deadly San Andreas Fault Longer Than Thought.”)
“Southern California [and northern Mexico are] a whole series of blocks sliding past each other,” Benthien said.
The same motion also caused the Baja Peninsula to start rifting away from mainland Mexico about five million years ago, subsequently opening up the entire Gulf of California. (See a Mexico map.)
“This is one of the classic places to study the early stages of the opening of ocean basins,” said Seth Stein, a geophysicist at Northwestern University in Evanston, Illinois.
Mexico Earthquake’s Aftershocks Raise “Some Concern”
The Baja California earthquake killed at least one person but did relatively little damage, because the epicenter was in a lightly populated area 38 miles (60 kilometers) south-southeast of Mexicali, Mexico.
Aftershocks, however, are propagating into the U.S. along the Elsinore and San Jacinto Faults, the California earthquake center’s Benthien said.
These weaker aftershocks don’t necessarily mean that a big temblor is brewing along those fault systems, Benthien said, but they do raise “some concern.”
Small earthquakes can sometimes precede larger temblors, because the little ones can cause a fault to slip until it reaches a point where a major slip releases a “Big One.”
In fact, a magnitude 4.4 temblor had rocked the same region in Baja California about a day before yesterday’s earthquake, and there had been other rumblings in the region “in the threes and fours all week,” Benthien said.
In addition, a separate magnitude 4.4 temblor had jolted the Los Angeles Basin on March 16, centered near the northern end of the Elsinore Fault system. But that earthquake was probably unrelated to yesterday’s temblor, Benthien said.
“A 4.4 is a pretty run-of-the-mill earthquake that we can have at any time in Southern California,” he added.
Source: National Geographic
By Mary Wisniewski
CHARLESTON, Missouri | Tue May 3, 2011 6:40pm EDT
(Reuters) – The effort to protect river towns in Illinois and Kentucky from rising floodwaters by blowing open a levee and inundating more than 100,000 acres of Missouri farmland appeared to be slowly working on Tuesday.
Tuesday, May 3, 2011
An explosion lights up the night sky as the the U.S. Army Corps of Engineers blows an 11,000 foot hole in the Birds Point levee in Mississippi County, Mo. on Monday, May 2, 2011. Army Corps of Engineers’ Maj. Gen. Michael Walsh gave the order to blow a two-mile hole into the Birds Point levee in southeast Missouri, which will flood 130,000 acres of farmland in Missouri’s Mississippi County but protect nearby Cairo, Ill.
(AP Photo/St. Louis Post-Dispatch, David Carson)
When the levees broke following Hurricane Katrina, many looked at the Army Corp of Engineers and wondered why they hadn’t upgraded the levees over the years. A report found the Corp responsible for their failures and they apologized.
At the same time, outside engineers reported the Army Corp of Engineers was “dysfunctional and unreliable.” Their dysfunction resulted in massive flooding and death in New Orleans.
Yesterday, a levee was breached in Atchison County, Missouri which will result in the flooding of Hamburg, Iowa. At this time, Fort Calhoun Nuclear Power Plant near Omaha, Nebraska has over 16 inches of water across its protected area. The Missouri river is expected to continue to rise because Gavins Point Dam in Yankton, South Dakota is releasing a record 150,000 cubic feet per second. Read more…
May 2nd, 2011
The U.S. Army Corps of Engineers will blow up a levee at the confluence of the Mississippi and Ohio rivers due to record high-water levels in both rivers, with work beginning Monday night, said Maj. Gen. Michael Walsh, president of the Mississippi River Commission.
At 4 p.m. Monday, water levels outside Cairo, Illinois, were 61.4 feet – well above the flood stage of 40 feet – according to the National Weather Service. Walsh ordered the intentional breach to alleviate pressure in the river system and to protect Cairo, even though it may lead to the flooding of 130,000 acres of mostly farmland in Missouri.
Missouri officials have been fighting the proposed levee breach.
Two dams have greatly affected the Missouri River in North Dakota since the expedition of Lewis and Clark. Those dams are Garrison Dam between Pick City and Riverdale, North Dakota, and Oahe Dam near Pierre, South Dakota.
The Missouri River drains one–sixth of the United States and flows 2,341 miles from its headwaters at the confluence of the Gallatin, Madison, and Jefferson Rivers at Three Forks, Montana, to its confluence with the Mississippi River at St. Louis, Missouri (U.S. Geological Survey, 2001).
One–third of the Missouri River has been transformed into lake environments, due to six dams built in Montana, North Dakota, South Dakota, and Nebraska (U.S. Geological Survey, 2001). Four of these dams, Fort Peck in Montana, Garrison in North Dakota, and Oahe and Fort Randall in South Dakota, are among the world’s largest dams in terms of volume (The Learning Network, Inc.). The remaining dams are Big Bend in South Dakota and Gavins Point on the South Dakota–Nebraska border.
Source: USGS Read More
BY VALERIE RAPPJuly 25, 2011
In 1910, Thomas Aldwell began building the first of two dams across the Elwha River on Washington’s Olympic Peninsula. His dream was to provide clean, cheap hydropower to nearby Port Angeles. This September, the federal government will start to blow up those dams. Native Americans and fish biologists dream of freeing the river and seeing the Elwha’s legendary wild salmon runs return.
Bold, visionary action or federal boondoggle? You can find people who feel both ways about the biggest dam removal ever in the United States. Read More
Thursday, August 23, 2012 Mort Amsel
I have been following the efforts by the federal corporation that operates under fraud as the “federal government”, especially in the area of water. Water rights, water access and water availability are seriously threatened by both factions of the political crime syndicate that is the federal corporation a.k.a., “the Federal Government”. There is no such entity, only a massive and hostile corporation that is foreign and hostile to the states. At issue now is our water. Read More
Posted on: 9:54 pm, March 6, 2013, by Gia Vang
ST. JOSEPH, Mo. – The 2011 flooding scarred thousands of acres and damaged countless businesses and homes and farms. But now the U.S. Army Corps of Engineers brace for a court fight.
Property owner Kenneth Reeder can point to how high the water got in his home next to the Missouri River. The water stayed there for several weeks and he is still recovering. Reeder puts some of the blame on the Army Corps for mismanaging the river.
“We helped solve far greater damage. Well in that case if you look at it, then maybe there should be a certain amount of compensation,” Reeder said.
He might get just that. Reeder, who also owns land along the river and serves on a federal study group for the corps, said he will be among hundreds of others treading the same water in a lawsuit against the corps for that flood season.
The effort is being handled by the St. Joseph law firm, Murphy, Taylor, Siemens & Elliott P.C. Nancy Potter, a lawyer with the firm, said they are still seeking clients, even with the hundreds they have currently.
“We have hundreds of clients up and down the Missouri River from South Dakota through Nebraska and Iowa, Missouri and Kansas,” Potter said.
The U.S Supreme Court ruled unanimously in an Arkansas case in December, saying under the Fifth Amendment, flooding there constituted a
“taking” of land for public purposes and warrants compensation.
Potter said the firm was watching that case closely. Now, they hope to have the same outcome.
“It’s a huge undertaking and I think that it will change a lot that happens a long the Missouri River,” Potter said.
But for Reeder, it’s not just about winning.
“At this point, it’s that that we have broken or cracked that bubble with the glass ceiling that the
Corps of Engineers operates unaccountable to taxpayers,” Reeder said.
A spokesperson for the area’s U.S Army Corps of Engineers said they’ve rehabilitated many levees in the area after the flood, but she could not comment on the possibility of a lawsuit over flood damage.
ABQ District Corps of Engineers and Army Divers work on the John Martin Dam
Published on Oct 18, 2012
The District employed an Army dive team to help us with operations and maintenance work on the bulkheads at theCorp’s John Martin Dam in southeastern Colorado.
Look at this water as only temporary.
Watch full video here>>> https://vimeo.com/68241867