Godlike Productions - Discussion Forum
Users Online Now: 1,748 (Who's On?)Visitors Today: 38,212
Pageviews Today: 76,575Threads Today: 39Posts Today: 627
01:03 AM


Rate this Thread

Absolute BS Crap Reasonable Nice Amazing
 

Himalayas and Pacific Northwest could experience major earthquakes

 
Rain-Man
Offer Upgrade

User ID: 30046145
Bosnia and Herzegovina
12/16/2012 01:26 PM
Report Abusive Post
Report Copyright Violation
Himalayas and Pacific Northwest could experience major earthquakes
Himalayas and Pacific Northwest could experience major earthquakes, Stanford geophysicists say

Although Caldwell emphasized that his research focuses on imaging the fault, not on predicting earthquakes, he noted that the MHT has historically been responsible for a magnitude 8 to 9 earthquake every several hundred years.

"What we're observing doesn't bear on where we are in the earthquake cycle, but it has implications in predicting earthquake magnitude," Caldwell said. "From our imaging, the ramp location is a bit farther north than has been previously observed, which would create a larger rupture width and a larger magnitude earthquake."

"We think that the big thrust vault will probably rupture southward to the Earth's surface, but we don't expect significant rupture north of there," Klemperer said. The findings are important for creating risk assessments and disaster plans for the heavily populated cities in the region.

[link to news.stanford.edu]
Rain-Man  (OP)

User ID: 30046145
Bosnia and Herzegovina
12/16/2012 01:28 PM
Report Abusive Post
Report Copyright Violation
Re: Himalayas and Pacific Northwest could experience major earthquakes
Measuring small tremors in the Pacific Northwest

The Cascadia subduction zone, which stretches from northern California to Vancouver Island, has not experienced a major seismic event since it ruptured in 1700, an 8.7–9.2 magnitude earthquake that shook the region and created a tsunami that reached Japan. And while many geophysicists believe the fault is due for a similar scale event, the relative lack of any earthquake data in the Pacific Northwest makes it difficult to predict how ground motion from a future event would propagate in the Cascadia area, which runs through Seattle, Portland and Vancouver.

"We can't predict when an earthquake will occur, but we can try to be very prepared for them," Baltay said. "Looking at these episodic tremor events can help us constrain what the ground motion might be like in a certain place during an earthquake."

[link to news.stanford.edu]
Rain-Man  (OP)

User ID: 30046145
Bosnia and Herzegovina
12/16/2012 01:31 PM
Report Abusive Post
Report Copyright Violation
Re: Himalayas and Pacific Northwest could experience major earthquakes
Cascadia quake simulations

The slow slip and tremor events in Cascadia are also being studied by Stanford geophysics Professor Paul Segall, although in an entirely different manner. Segall's group uses computational models of the region to determine whether the cumulative effects of many small events can trigger a major earthquake.

"You have these small events every 15 months or so, and a magnitude 9 earthquake every 500 years. We need to known whether you want to raise an alert every time one of these small events happens," Segall said. "We're doing sophisticated numerical calculations to simulate these slow events and see whether they do relate to big earthquakes over time. What our calculations have shown is that ultimately these slow events do evolve into the ultimate fast event, and it does this on a pretty short time scale."

One thing that makes Segall's work difficult is a lack of data from actual earthquakes in the Cascadia region. Earlier this year, however, earthquakes in Mexico and Costa Rica occurred in areas that experience slow slip events similar to those in Cascadia. Segall plans to speak with geophysicists who have studied the lead-up to those earthquakes to compare the data to his simulations.

[link to news.stanford.edu]
Rain-Man  (OP)

User ID: 30046145
Bosnia and Herzegovina
12/16/2012 01:35 PM
Report Abusive Post
Report Copyright Violation
Re: Himalayas and Pacific Northwest could experience major earthquakes
Great Nepalese quake of 1255 points to Himalayan risk

Experts from Nepal, France and Singapore mapped deposits of river sediment displaced along part of the fault line where the Indian subcontinent slams into the Asia tectonic plate at up to 50 millimetres (1.97 inches) per year. With the help of carbon dating, they found that the soil movement in one place was caused by a huge quake that coincided with the great event of July 7 1255. More than six centuries later, there was another surface-breaking event, correlating to a magnitude 8.2-event in 1934. The finding is important because until now there had been no evidence of surface ruptures from the collision of these plates.

December 16, 2012 A mega-quake in 1255 that wrecked the Nepalese capital, wiped out a third of the population of Kathmandu Valley and killed the country's monarch, King Abhaya Malla, was of a kind that may return to the Himalayas, seismologists reported on Sunday.

Surface ruptures are not only extremely violent—they also tend to release most or all of the accumulated strain. "Blind" quakes are ones that do not break the surface, and tend to be more frequent.

[link to phys.org]

Last Edited by Rain-Man on 12/16/2012 01:35 PM
Rain-Man  (OP)

User ID: 30046145
Bosnia and Herzegovina
12/16/2012 01:43 PM
Report Abusive Post
Report Copyright Violation
Re: Himalayas and Pacific Northwest could experience major earthquakes
Seismic Hazard and Mitigation
Activities in Nepal - with Emphasis
on Kathmandu Valley
B.N. Upreti and Masaru Yoshida

[link to saarc-sdmc.nic.in]
Rain-Man  (OP)

User ID: 30046145
Bosnia and Herzegovina
12/16/2012 01:49 PM
Report Abusive Post
Report Copyright Violation
Re: Himalayas and Pacific Northwest could experience major earthquakes
The 1934 Bihar earthquake was one of the worst earthquakes in India's history. Some 30,000 people were said to have died

What are the chances of an earthquake like the 1934 one happening again? “It always is a possibility,” said Mr. Bellini. “But it can also be another 100 years.”

Mr. Bellini said that since seismology is a young science, there is not sufficient data to give accurate estimates of what the historical frequency of earthquakes is. However, he estimated that “80 years wouldn’t be an unreasonable number for recurrent rate” for large earthquakes. That falls in line with popular beliefs in Nepal.

[link to en.wikipedia.org]
LindaE

User ID: 28582441
United States
12/16/2012 01:56 PM
Report Abusive Post
Report Copyright Violation
Re: Himalayas and Pacific Northwest could experience major earthquakes
bump
Rain-Man  (OP)

User ID: 30046145
Bosnia and Herzegovina
12/16/2012 02:02 PM
Report Abusive Post
Report Copyright Violation
Re: Himalayas and Pacific Northwest could experience major earthquakes
Next Himalayas-Nepal EQ will probably be shallow one again and think stronger of M 7.2 + ..

Earthquake Risk Perception among Citizens in Kathmandu, Nepal

[link to www.massey.ac.nz]

[link to www.lalitpur.org.np]

Last Edited by Rain-Man on 12/16/2012 02:24 PM
Rain-Man  (OP)

User ID: 30061108
Bosnia and Herzegovina
12/16/2012 02:23 PM
Report Abusive Post
Report Copyright Violation
Re: Himalayas and Pacific Northwest could experience major earthquakes
1988 Nepal earthquake

1988 Nepal earthquake occurred in 1988 in Nepal near the Indian border, affecting much of northern Bihar. The magnitude 6.6 earthquake shook the region on August 21, 1988, killing about 1467 persons (282 in India and 900 in Nepal) and injuring more than 16,000. The earthquake struck in two installments of 10 seconds and 15 seconds each and left cracks in 50,000 buildings, including Raj Bhavan and the old Secretariat Building in Patna, Bihar.

[link to en.wikipedia.org]





GLP