A 6.4-magnitude earthquake jolted southern Taiwan on Thursday morning, according to the U.S. Geological Survey. There were no immediate reports of injuries or deaths but some damage has occurred to buildings and major bridges, and power was cut off near the epicenter.

The quake struck at about 8:20 a.m. (7:20 p.m. Wednesday ET) in a mountainous region about 25 miles northwest of Taitung, on the southeast coast, and 40 miles east of Tainan and Kaohsiung on the southwest coast.

The region, which includes Maolin National Scenic Area, is recovering from a direct hit by Typhoon Morakot that killed hundreds in August. The typhoon dumped more than two feet of rain, causing serious mudslides in the south, including one that buried the village of Shiao Lin under 50 feet of mud.

Thursday’s quake was followed by several aftershocks, the largest reaching 4.8. The initial 6.4 quake rumbled to the surface from 14 miles deep.

The Taiwan Ministry of Interior and the National Fire Agency said electricity was cut off near the epicenter but had no further information.

Source – CNN

• Comments

The Feb. 27 magnitude 8.8 earthquake in Chile may have shortened the length of each Earth day.

JPL research scientist Richard Gross computed how Earth’s rotation should have changed as a result of the Feb. 27 quake. Using a complex model, he and fellow scientists came up with a preliminary calculation that the quake should have shortened the length of an Earth day by about 1.26 microseconds (a microsecond is one millionth of a second).

Perhaps more impressive is how much the quake shifted Earth’s axis. Gross calculates the quake should have moved Earth’s figure axis (the axis about which Earth’s mass is balanced) by 2.7 milliarcseconds (about 8 centimeters, or 3 inches). Earth’s figure axis is not the same as its north-south axis; they are offset by about 10 meters (about 33 feet).

By comparison, Gross said the same model estimated the 2004 magnitude 9.1 Sumatran earthquake should have shortened the length of day by 6.8 microseconds and shifted Earth’s axis by 2.32 milliarcseconds (about 7 centimeters, or 2.76 inches).

Gross said that even though the Chilean earthquake is much smaller than the Sumatran quake, it is predicted to have changed the position of the figure axis by a bit more for two reasons. First, unlike the 2004 Sumatran earthquake, which was located near the equator, the 2010 Chilean earthquake was located in Earth’s mid-latitudes, which makes it more effective in shifting Earth’s figure axis.

Second, the fault responsible for the 2010 Chiliean earthquake dips into Earth at a slightly steeper angle than does the fault responsible for the 2004 Sumatran earthquake. This makes the Chile fault more effective in moving Earth’s mass vertically and hence more effective in shifting Earth’s figure axis.

Source – NASA

• Comments

The earthquake in Chile was far stronger than the one that struck Haiti last month — yet the death toll in this Caribbean nation is magnitudes higher.

The reasons are simple.

Chile is wealthier and infinitely better prepared, with strict building codes, robust emergency response and a long history of handling seismic catastrophes. No living Haitian had experienced a quake at home when the Jan. 12 disaster crumbled their poorly constructed buildings.

And Chile was relatively lucky this time.

Saturday’s quake was centered offshore an estimated 21 miles underground in a relatively unpopulated area while Haiti’s tectonic mayhem struck closer to the surface — about 8 miles — and right on the edge of Port-au-Prince, factors that increased its destructiveness.

Source – FOX News

• Comments

Google on Saturday activated an online “person finder” tool to help relatives and friends to find loved ones following the huge earthquake in Chile.

The “Person Finder: Chile Earthquake” from the California-based Internet giant is located at Chilepersonfinder.appspot.com and offers users the choice of using it in English and Spanish.

It asks users “What is your situation?” and gives them the choice between “I’m looking for someone” and “I have information about someone.”

• Comments

Surveillance cameras captured images of Chile as it shook violently as the nation was hammered by an 8.8 magnitude earthquake Saturday morning.

Raw Video: Quake-Stricken Chile in Ruins

History of Chile’s Earthquakes
The largest earthquake ever recorded struck the same area of Chile on May 22, 1960. The magnitude-9.5 quake killed 1,655 people and left 2 million homeless. The tsunami that it caused killed people in Hawaii, Japan and the Philippines and caused damage to the west coast of the United States.

Saturday’s quake matched a 1906 temblor off the Ecuadorean coast as the seventh-strongest ever recorded in the world.

• Comments