Posts Tagged ‘Himalayas’

Himalayan earthquakes did break the surface in 1255 and 1934

December 30, 2012

The Indian Tectonic Plate split from Godwana some 140 million years ago and started colliding into the Eurasian Plate some 40 – 50 million years ago. The Indian Plate is being subducted under the Eurasian Plate. The collision is still going on with the Indian Plate moving North East at about 6 -7 cm per year while the Eurasian Plate is moving Northwards at about 2 cm per year. The region is geologically active and earthquakes are not uncommon as the Himalayas continue to grow. It was thought that Himalayan earthquakes rarely, if ever, broke the surface and were “blind quakes”. But a new paper describes field work with novel imaging and dating techniques which show that at least the earthquakes of 1255 and 1934 have left discernible ruptures.

S. N. Sapkota, L. Bollinger, Y. Klinger, P. Tapponnier, Y. Gaudemer, D. Tiwari. Primary surface ruptures of the great Himalayan earthquakes in 1934 and 1255Nature Geoscience, 2012; DOI: 10.1038/ngeo1669

Wikipedia: The Indo-Australian plate is still moving at 67 mm per year, and over the next 10 million years it will travel about 1,500 km into Asia. About 20 mm per year of the India-Asia convergence is absorbed by thrusting along the Himalaya southern front. This leads to the Himalayas rising by about 5 mm per year, making them geologically active. The movement of the Indian plate into the Asian plate also makes this region seismically active, leading to earthquakes from time to time.

Even blind quakes can be devastating as with the Kashmir quake of 2005:

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Settled science? Karakoram glaciers, polar bear and emperor penguin numbers are all growing – not disappearing

April 16, 2012

A settled science? Global warming was going to melt all the Himalayan glaciers by 2035, polar bears were going to be exterminated and emperor penguins populations were going to be devastated. But the climate models are proving to be just the wishful thinking of an alarmist creed.

1. The Guardian: The glaciers flowing between the towering peaks of the Karakoram range on the Pakistan-China border have grown in size in the last decade, according to new research. The impact of climate change on the ice in the greater Himalaya range has been controversial because of an unfounded claim by the United Nations’ climate science panel over the rate of melting in the region. However the melting of vast volumes of ice into the sea in most other parts of the world has been clearly demonstrated. In March, scientists showed that far less ice was being lost across the Himalayas than had been estimated from sparse ground surveys on the remote slopes.

The new study shows that glaciers in one important part of the mountain range are growing. “We provide a detailed glacier-scale evaluation of mass changes in the central Karakoram,” said Julie Gardelle, at CNRS-Université Grenoble, who led the research published in Nature Geoscience on Sunday. …

2. Polar bear populations have never been as large as they are now.

3. Emperor penguin populations are twice the size they were once thought to be.

It is time for the climate brigade and their hangers-on to develop a little humility and acknowledge that the chaotic, turbulent layer around the earth which creates our climate is far from being understood.

Time to ditch some of the models.


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