Coach House Geography

Interesting Geography stuff for InterHigh

Archive for the ‘Hazards’ Category

September 30: Indonesian Quake Damages Java Homes

Posted by lindym on November 6, 2009

Sumatra

More than a thousand Sumatrans were dead in the wake of two strong earthquakes in as many days. Officials believe the death toll will rise further.

The initial quake registered a magnitude of 7.6 late Wednesday afternoon as it wrecked homes and other buildings, including hospitals, in the city of Padang.

The shaking also sparked fires and broke water mains, causing streets to flood across the city.

Thousands of victims were feared still buried beneath the rubble two days after the first quake struck.

Posted in Hazards, IGCSE, Tectonics | Leave a Comment »

Earthquake strikes southern Iran

Posted by lindym on November 5, 2009

iran map

An earthquake has struck southern Iran, with hundreds of people suffering injuries, a state news agency says.

There are no reported deaths but about 100 people needed hospital treatment, the Irna news agency said. The 4.9-magnitude quake in Bandar Abbas sent people streaming into open spaces and cut power cables in the city.

Iran straddles a major geological fault line, making it prone to tremors. In 2008, seven people were killed in an earthquake in the same region. On average one earthquake hits the country each day, although most are minor tremors and are often in sparsely populated regions.

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The Sahara greening? Is it possible?

Posted by lindym on August 13, 2009

Scientists are now seeing signals that the Sahara desert and surrounding regions are greening due to increasing rainfall.

Go to this link in the National Geographic to find out more.

Also worth a look is this link at the bottom of the page: a map of global warming’s impacts.) Click on each item and more explanation comes up about the effects of global warming

Posted in Fragile environments, Hazards, IGCSE, Water, Weather | Leave a Comment »

The power of water!

Posted by lindym on July 22, 2009

The Durham Grand Canyon: Flooding after heavy rain carves vast trench in farm land

By Neil Sears

Read more: http://www.dailymail.co.uk/news/article-1201388/The-Grand-Canyon-Durham-Flooding-heavy-rain-carves-vast-trench-farm-land.html#ixzz0M22H8sJp
Durham picOn Friday night, it was a perfectly ordinary, perfectly flat, cornfield.

By Saturday morning, it was riven in two by a vast trench up to 30m across, 5m deep and 200 metres long.

The enormous gully  -  so big that locals have called it ‘the Grand Canyon of Durham’  -  is believed to have been formed in a matter of minutes when millions of gallons of floodwater from surrounding farmland suddenly tore through the soil towards the River Wear.

Simultaneously, the high waters of the Wear had broken the banks at exactly the same point  -  and in an instant, a new tributary to the river was formed. Luckily, no buildings were near enough to be affected.

Durham mapNow the floodwater has drained away and the river has returned to its normal level, an almost empty canyon remains, with just a trickle of water at the bottom.

It is an extraordinary illustration of the power of nature  -  and shows that enough water, flowing with enough force, doesn’t need decades to carve a path through the earth.

In fact, it is estimated that the water carried into the river up to 12,000 cubic metres of soil, weighing 15,000 tons, the volume of 25 swimming pools.

Durham experienced 80mm of rain in 24 hours, ten times the average, helping to create the new feature in a field belonging to Houghall agricultural college in the village of Shincliffe.

Pete Whitfield, from the college, discovered the canyon on Saturday morning when he rushed to work to sort out the flooding problems, which were so bad several pigs were drowned.

He was early enough on the scene to see the water thundering into it from the field.

‘I heard this rushing like Niagara Falls,’ he said. ‘And I could see this water wearing away the land. The field was perfectly flat 25 acres before. Now there’s only about 18 acres left.

‘It’s an amazing phenomenon, but I estimate it’s the result of water from up to 120 acres of flooded land.’

Posted in Hazards, IGCSE, Physical Geography, Water, Weather, Y7/8 | Leave a Comment »

Italy Update

Posted by lindym on April 22, 2009

Could copy this but I won’t. Go to Kingsdown - a great geo site to find out what is going on in Italy

Posted in Fragile environments, Hazards, IGCSE | Leave a Comment »

Town Ignored warning of Earthquake

Posted by lindym on April 7, 2009

It has always been difficult to tell when an earthquake will hit.

But there had been earth tremors since mid-January in and around L’Aquila in Central Italy.

Giampaulo Giuliani worked at a physicist .  He claimed to have detected radon gas emissions which could only be released under intense pressure. However, the local mayor charged him with scaremongering which meant that he could no longer speak out about his fears of an earthquake.

But on Sunday, Giampaulo be came even more worried when his readings indicated immanent disaster. But he could do nothing with the information because of the injunction on him.

Since the last post the death toll has risen to 179.

Posted in Fragile environments, Hazards, IGCSE, Physical Geography | Leave a Comment »

Italian Earthquake 6 April 2009

Posted by lindym on April 6, 2009

Where?: Medieval city of L’Aquila, 95km (60 miles) from Romeitaly-1

When?: 0332 6 April 2009

How strong?: 6.3 magnitude at 0332 local time (lots of people asleep and therefore trapped)  preceded by a 4.6 magnitude quake (no reported damage)

Effects:  Initial reports state that 27 people have been killed, 30 unaccounted for, 3,000 to 10,000 builidngs damaged.  Many historical buildings have collapsed.  As of 1030 6 April 2009.

italy-2

Why? : Down the middle of Italy is the large Apennine Fault which is orientated NW-SE.  It is a complex geological area and the appenines is largely an accretinary wedge formed due to the process of subduction.  Essentially the region is both a collision zone and a subduction zone between the Eurasian and African plates as well as smaller microplates.  The US Geological Survey has extensive infrmation.

Italian Earthquake Map

Category 1 is the strongest (red)italy-3

Posted in Hazards, IGCSE, Physical Geography, Uncategorized | Leave a Comment »

Year 10 – unit 1B Hazards

Posted by lindym on January 6, 2009

A link to the IGCSE page about the San Andreas Fault – YouTube video

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