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Quote:Berkland says that the approaching seismic window is one of the largest in many years. He sees it developing between the 19th to the 26th of March 2011.
In the FOXNews interview he stressed, "I'm saying we just had a massive fish kill. Maybe a million fish died in Redondo Beach. They had a massive fish sweep in Mexico. We just had a bunch of whales come in close to San Diego."
Berkland is convinced that subtle changes in the magnetic field are the precursors to large earthquakes.
"Changes in the magnetic field often precede larger earthquakes. Most animals have the mineral magnetite in their bodies, including people." Magnetite, a form of ferrous oxide, is very sensitive to magnetic fields.
"Just before the World Series quake," he explained, "there was very unusual beaching of rare whales in the Ocean Beach, in San Francisco. Just after that, an equally rare pygmy sperm whale washed up at Santa Cruz, within about five miles of the epicenter of the World Series quake. That kind of beaching had never occurred before nor since. So we're looking for strange fish coming into from deep water to the shallow water, wild animals coming into cities.
"I used to just scoff at these kinds of things, because I was a mainstream geologist until I found out that earthquakes are fitting a pattern. The big earthquake in the Indian Ocean followed massive beachings of whales in Taiwanââ¬âand not [just] Taiwan, but New Zealand and Australia and Tasmania. And then within couple of days, they had a 8.3 in south of New Zealand, and then came the 9.1 in the Indian Ocean, with the big tsunami, on the very day of the full moon."
The last really big quake that occurred on the northeastern rim of the ring of fire occurred in Alaska.
"The previous big quake and tsunami was in Alaska, which was a 9.2 magnitude event, on the day off the full moon, on the 27th of March."
That mega-thrust earthquake, known today as The Great Alaskan Earthquake, hit at 5:36 P.M. Alaska Standard Time on Good Friday, March 27, 1964. The ground split open, highways buckled, entire buildings collapsed and several tsunamis were generated. About 131 people died.
When asked if the quake that's coming will be another 9.0 event, Berkland admitted he just didn't know.
09-22-2011, 07:57 AM (This post was last modified: 09-22-2011, 07:58 AM by sumishi.)
[size="3"]An article from TOI (B K Mishra TNN) of 20/09/2011 says:[/size]
Quote:Bigger quake round the corner Bihar fears worst yet to come
Temblor Threat In Foothills,Gangetic Plains
...
...
[color="#0000ff"]{a}[/color] N Dayal,former director of the Geologial Survey of India,says ...Coronal mass ejections... that are ejected from the sun for several hours,are absorbed in active faults, increasing chances of an earthquake in March-April ...
[color="#0000ff"]{b}[/color] He adds that with pronounced climatic changes and global warming,the rate of plate movement has been changing,leading to increased stress build-up....The melting of glaciers is also reducing the load on the Himalayas,creating an isostatic imbalance and shaking the earth
[url="http://dailypioneer.com/pioneer-news/top-story/8961-when-the-earth-pushed-west.html"]When the earth pushed west[/url]
Quote:So far, it has been known that Indiaââ¬â¢s landmass is inching slowly up, moving in the north and north-easterly direction. The interaction of this moving landmass with the Eurasian tectonic plate ââ¬â one getting below the other ââ¬â in the Himalayas is what causes most of the tremors in the region. The September 18 earthquake, however, was not the result of a forward pushing of the Indian plate; it was caused by lateral movements.
ââ¬ÅThe initial analysis of the Sikkim earthquake suggests that it wasnââ¬â¢t caused by one plate thrusting beneath another, but by so-called ââ¬Ëstrike-slip faultingââ¬â¢, a mechanism where fault systems slide side-to-side when two tectonic plates butt heads. Geologists suspect that the earthquake was due to an intra-plate fault within the upper Eurasian plate or the underlying Indian plate, rather than the interface between the two plates,ââ¬Â says Prof RB Singh of the Department of Geography, Delhi School of Economics.
HR Wason, Head of the Department of Earthquake Engineering at IIT Roorkee, is surprised to see the lateral movement in the region. ââ¬ÅSuch movements are not known to happen in the Himalayas,ââ¬Â says he. Prof Paul Segall of Stanford University, however, believes thereââ¬â¢s nothing new in all this. ââ¬ÅIt is not atypical to have diverse types of fault movement even in an area dominated by convergence of two plates,ââ¬Â he says. Roger G Bilham of Colorado University takes Segallââ¬â¢s argument forward, when he says: ââ¬ÅThe slip in this earthquake is an indication of ââ¬Ëdifferentialââ¬â¢ northward motion of the Indian plate and possibly the subsequent adjustment of the Tibetan Plateau above it.ââ¬Â
But, do all these make the region more vulnerable to earthquakes?
ââ¬ÅIntra-plate earthquakes do not occur near plate boundaries, but at the location of ancient failed rifts, because such old structures may present a weakness in the crust where it can easily slip to accommodate regional tectonic strain. The earthquake caused by sideways movement of plates, therefore, is generally located in the stable interior parts of continents which are believed to be less vulnerable to hazards,ââ¬Â says Singh.
The recent event of intra-plate earthquake in Sikkim has, thus, pushed the hazard line to further south of the Himalayas. ââ¬ÅI believe the Sikkim quake should serve as a reminder that more parts of the region than actually thought of are prone to earthquakes and planning should account for this risk,ââ¬Â says Segall.
Currently, as far as earthquakes are concerned, the country has been divided into five zones. The Northeast, Jammu & Kashmir, and a significant portion of Himachal Pradesh and Uttarakhand come under Zone V, which is the most volatile of the earthââ¬â¢s seismic centres. Uttar Pradesh, Delhi and a part of Uttarakhand fall in Zone IV. Central India is bracketed under Zone III; and, south India comes under Zone II. Now, after the Sikkim tremor, the entire zone system has to be reorganised, and the threat perception recast.
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![[Image: map_plate_tectonics_world.gif]](http://vulcan.wr.usgs.gov/Imgs/Gif/PlateTectonics/Maps/map_plate_tectonics_world.gif)
