Mexico earthquake

On the 21st September 2017, a magnitude 7.1 earthquake struck 71 miles from Mexico City. The quake struck at 1:14 p.m. local time.

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Source: BBC News
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Source: PA

The quake came just hours after the annual earthquake drill in Mexico City, marking the anniversary of the magnitude 8 earthquake which struck the city 32 years ago, killing 9,500 people.

1985 Mexico City earthquake documentary

Why is Mexico so prone to earthquakes?

Mexico is prone to major earthquakes because it is one of the earth’s subduction zones. The Cocos plate is forcing its way beneath the North American plate, which increases the risk of major earthquakes.

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Source: geology.com

Mexico has a long history of destructive earthquakes. It is one of the world’s most seismically active regions.

The mayor of Mexico City reported that buildings in at least 44 locations had collapsed or been severely damaged , including supermarkets and blocks of flats. As a result of gas pipes rupturing, fires were also reported across the city.

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Source: BBC News

Among the casualties were at least 21 children who died when their primary school collapsed, trapping them inside.

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Source: PA

Enrique Rebsamen school before the quake

mexico school before
Source: Google Street View

Enrique Rebsamen school after the quake

mexico-earthquake school
Source: nydailynews.com


Are Mexico’s two September earthquakes connected? Find out more here.

Why did some buildings collapse, whilst others remained intact? Find out here


Capital built on ancient lake bed, amplifying the shaking, seismologists say. Read more here

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The search for survivors continues as the death tolls rises 3 days after quake

Download note-taking template here:

Mexico earthquake report

Additional resources and sources

 

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Nepal earthquake 2015

An earthquake with a magnitude of 7.9 struck Nepal on Saturday 25th April 2015 at 11.41 am (local time), the worst in 81 years. A state of emergency was declared as over 7,000 fatalities were reported by the following Saturday. The epicentre of the earthquake was 2km below the ground. As a result of the shallow nature of the earthquake, the impacts have been devastating, toppling buildings, opening gaping cracks in roads and sending people rushing into the open as aftershocks rattled their damaged homes.

Where do major earthquakes happen and why? view here

Source - BBC News
Source – BBC News
Seismologists have expected a major earthquake in western Nepal, where pressure has been building from the grinding between tectonic plates — the northern Eurasia plate and the up-thrusting Indian plate.

The quake caused dozens of buildings in Kathmandu to collapse, including the historic Dharahara Tower. The city’s main hospital was overwhelmed by casualties and residents faced a nights on the streets with nowhere to go. Most of the Nepalese fatalities were from the Kathmandu Valley.

The earthquake caused avalanches on Mount Everest. An Indian army mountaineering team has found 18 bodies on Mount Everest.

The avalanche had buried part of the base camp and two tents had been filled with casualties.

Ministry officials estimated that at least 1,000 climbers, including about 400 foreigners, had been at base camp or on Everest when the earthquake struck.

At least 34 deaths occurred in northern India. Buildings swayed in Tibet and Bangladesh.

View a series of before and after slider images here

Nepal is one of the poorest countries in the world. As a result, it is not best placed to deal with such a major natural disaster GNP per capita of Nepal is $730 (2013), whereas the GNP per capital of the UK is $41,680 (2013).

Political instability does little to boost Nepal’s resilience. “This earthquake is the nightmare scenario. The country has … suffered terrible conflicts, poor governance, and heart-wrenching poverty, all of which created and perpetuated the vulnerability which has been devastatingly exposed.” (Ian Kelman of the UCL Institute for Risk & Disaster Reduction).

Why is Nepal vulnerable to earthquakes?

ANIMATION – Plate tectonics. The Himalayas

The government had made some improvements in making some buildings more robust and reinforcing vulnerable ones, but many larger buildings, such as hospitals and older homes, remained extremely vulnerable. In addition, rapid urbanisation in cities like Kathmandu has meant that many homes have been built at a high density.

However, it appears that newer buildings fared better and withstood the quake, whereas the older buildings were worse affected. On the positive side, the earthquake struck on a Saturday, when schools were not in session, which may have reduced the death toll.

VIDEO – What caused the earthquake?

Meanwhile a powerful aftershock was felt on Sunday in Nepal, India and Bangladesh, and more avalanches were reported near Everest.

The 6.7 magnitude tremor, centred 60km (40 miles) east of Nepal’s capital Kathmandu, sent people running in panic for open ground in the city.

VIDEO – Drone footage shows extent of damage

VIDEO – More drone footage was filmed in the Sindhupalchok district, 80 kilometres (50 miles) from Kathmandu, near the epicentre of the earthquake

The problems were compounded by erratic internet and mobile phone communications. Many roads were blocked by rubble, there were landslides as well. As a result, getting aid to places that needed it was more difficult.

VIDEO – Nepal declares state of emergency

Offers of aid: 

  • The US sent a disaster response team and released an initial $1m (£0.7m) according to the US aid agency USAid
  • India sent several aircraft, carrying medical supplies and a mobile hospital, as well as a 40-strong disaster response team, including rescuers with dogs 
  • The UK is sent an eight-strong team of humanitarian experts 
  • Pakistan is sent four C-130 aircraft carrying a 30-bed field hospital and army doctors and specialists; urban search-and-rescue teams equipped with radars and sniffer dogs; and food items, including 2,000 meals, 200 tents and 600 blankets
  • Norway promised 30 million krone (£2.5m; $3.9m) in humanitarian assistance
  • Germany, Spain, France, Israel and the European Union also pledged to send aid


How inflatable hospitals are saving lives in Nepal

  

  


    More details on the earthquake:

    What are the challenges of disaster relief? Read about them here

    VIDEO – Was Nepal prepared for a major earthquake?

    Article – A disaster that shows quakes don’t kill people, buildings do

    Five facts that explain Nepal’s devastating earthquake here.

    VIDEO – Nepal Sherpas worry about their livelihoods as tourist season is cancelled


    View INTERACTIVE MAP showing areas and population likely to be affected by future earthquakes in Nepal.

    After four days, frustration evident in Nepal over pace of response to the disaster. Read and watch video report here

    How crisis mapping is helping the relief effort.

    After several weeks, attention turned to the longer term impacts, as questions were asked as to whether the economy of Nepal can recover from this major event. Read here

    Images before and after – ArcGIS story maps show how things have changed.


    Additional resources:

    CLICK HERE to view You Tube video playlist of reports from Nepal.

    Visit the BBC News NEPAL EARTHQUAKE – SPECIAL REPORT page for more in depth coverage.

    Sources and more information: BBC News, Al Jazeera, The Guardian, New York Times, World Bank, Reuters, ITV news, Channel 4 News

    More info here:

    Boxing day Tsunami – 10 years on

    On the 26th December 2004, a 9.2 magnitude earthquake occurred off the western coast of Northern Sumatra, Indonesia. The thrust was so violent, it released the energy equivalent of 23,000 Hiroshima-type atomic bombs.

    BBC News map
    Source – BBC News website

    It was the fourth largest earthquake in recent times. 14 countries were affected including Indonesia, the Maldives, Myanmar, Sri Lanka, Thailand and Bangladesh. Among the worst-hit regions was Aceh, an Indonesian province on the northern tip of Sumatra. 30 metre high waves travelled inland, killing approximately 130,000 people, whilst more than half a million were displaced.

    10 years on, this BBC News video takes a closer look at the scale of the disaster

    According to Oxfam, five million people were affected of which 1.7m were made homeless, half a million were injured and more than 230,000 were killed.

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    Source of map above and more details here – Views of the World

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    BBC News report from 26th December 2004. Including explanation about how it happened.

    The BBC News website created a Special report page to highlight the extent of the devastation

    Documentary – The wave that shook the world

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    Ten years on

    Then and Now – You can view a collection of interactive images here which allow you to see how things have changed since the tsunami by toggling on the images for before and after shots.

    VIDEO – This collection of images shows the changes 10 years on.

    This selection of images also shows the extent of the impact and how people and the environment have recovered since

    Sky News documentary – 10 years after the wave:

    The World Health Organization estimates that up to 20 percent of a population may suffer stress-related disorders in the aftermath of a calamity like the Indian Ocean tsunami.

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    Impact on tourism

    Many were concerned that the tsunami would have a long term impact on the tourism industry in places like Indonesia and Thailand. However, Phuket recovered within 6 months according to those involved in tourism in the area. Read more here 

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    Fertility boom

    In communities where the tsunami cost lives, research suggests there has been a fertility boom. Mothers who lost children during the disaster were much more likely to have more children in the 5 years after the event, than those who did not suffer a death. Read more about the research here.

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    Learning the lessons

    The tsunami prompted a rethink of Indonesia’s disaster management procedures. In the aftermath of the disaster, laws were passed making it mandatory for new homes, buildings and schools to include disaster mitigation plans.

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    More details about tsunami preparations and how science is still learning from the 2004 event

    In Banda Aceh, signs now point out tsunami evacuation routes and in some places warning sirens have been installed.

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    The Aceh Tsunami Museum — housed in a building shaped like the prow of a ship — not only commemorates the disaster, but also serves as an emergency shelter should a tsunami ever hit the city again.

    Also, each year teachers take part in disaster training conducted by the government and the Indonesian Red Cross. Many schools also holds annual disaster drills to teach students what to do in the event of another major event.

    In Phuket, communities have taken responsibility for preparations in the event of another tsunami. VIDEO REPORT here:

    In 2010, Sri Lanka carried out its first major earthquake and tsunami drill. 14,000 people across 14 coastal areas were evacuated. Read more here

    More have been carried out since on a regular basis


    Meanwhile, 24 countries participated in a major Indian Ocean-wide mock tsunami drill on September 9th and 10th 2014 that was aimed at testing the Indian Ocean Tsunami Warning and Mitigation System (IOTWS). More details here 

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    Is the world better prepared for disaster?

    Read this article from CBS News

    Read this article from CNN

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    Find out more about Tsunamis on the BBC Earth page. Full of useful information here

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    Sources – BBC News; Sky News; Daily Telegraph; Oxfam; New York Daily News; Phuket Gazette; The Jakarta Globe; IRIN News; News First Sri Lanka; ABC News (Australia); CBS News; The Independent; Views of the world; Al Jazeera English

    Flooding on the Somerset levels 2014

    Sunday 25 January 2014

    A “major incident” has been declared for all areas affected by flooding in Somersetfollowing warnings of further heavy rain.

    BBC VIDEO REPORT – Villagers still cut off
    Residents in the village of Muchelney have been cut off for three weeks and have been reliant on volunteers in boats bringing them supplies. 

    17,000 acres of land are still underwater a month after the flooding began. The council is providing support to affected residents, including temporary toilets, sandbag collection points in local villages and deliveries to the most stranded properties.
    It has provided around 3,000 sandbags in the last few weeks. The council is also on standby to provide alternative temporary accommodation and set up rest centres if the situation gets worse.

    Monday 27 January 2014


    VIDEO – Somersetfloods: Ten tonnes of flood water pumped per second

    VIDEO – ‘River needs dredging properly’ say local people.

    Many people are still stranded. Many are now complaining that if The Environment Agency have dredged the rivers, the extent of the flooding would have been reduced. Meanwhile, The Environment Agency is continuing to pump water from the Somerset Levels and has extra pumps working on Northmoor and Saltmoor.

    Management strategies

    Somersethas set up a “tactical command group” to deal with the flooding emergency declared in the area. 
    The group will include representative from the emergency services, local authorities, health organisations and utilities and will use their expertise and knowledge to tackle the issues that have arisen.
    Devon and Cornwall Fire Service crews have been deployed in four wheel drive vehicles and rescue boats to provide safety advice to residents and map access routes across the affected areas.

    Villagers who have been cut off from the rest of the country by floods for more than three weeks have received help from a floating bridge.
    The pontoon has been set up along a country road linking the village of Muchelney to the rest of Somerset. The bridge allows villagers to walk part of the journey to dry land, however, the rest has to be completed by boat. Muchelney has been inaccessible by car and foot since 2 January 2014. Some parts of the surrounding area are 5 feet underwater.
    What does it mean when a ‘major incident’ is declared?

    A major incident is declared where there is a situation which could not be dealt with easily by the local council and could threaten lives, disrupt the community or damage property. It means the local authority can organise emergency evacuations, set up rest centres and mobilise voluntary organisations.
    The biggest pumping operation ever is under way on the Somerset Levels, but much of the water is going into already swollen rivers. Seven tonnes of water are being pumped away from the villageof Fordgate in Somerset every second, according to an Environment Agency spokesman.
    More homes on the Somerset Levels are facing flooding as water levels continue to rise, ahead of further predicted heavy rainfall this weekend. 
    VIDEO REPORT – Major incident declared
    The bad weather and flooding has left many farms covered by floodwater. In Somerseta lot of productive farmland has been lost, with more than 43 square miles flooded 
    Useful background information on data behind the flooding can be viewed here: http://notalotofpeopleknowthat.wordpress.com/2014/01/17/flooding-in-the-somerset-levels-a-case-study/

    Flooding on the Somerset levels is nothing new though. Watch this video from 2012:

    Sources: BBC News; Sky News; The Guardian; ITV News; The Environment Agency; The Telegraph; Aztec Media Skycam; Daily Mail