Hazards Flashcards
Where is Nyiragongo?
Congo
On what boundary is Nyiragongo on?
East African Rift Valley - hot spot
What type of volcano is Nyiragongo?
Basaltic shield volcano
When did the volcano erupt?
2002
What happened in Congo in 2002?
A 13km fissure opened and lava flowed towards the city Goma
What hazards occurred at Nyiragongo?
Lava flows, ash fallout, gases, acid rain
How quickly did the lava at Nyiragongo flow?
97kmh
How many people were killed by Nyiragongo?
100
How many houses were destroyed by Nyiragongo?
20%
What were the secondary impacts of the Nyiragongo eruption?
120,000 homeless, cholera spread by refugees in Rwanda, lake polluted, looting of houses
What is the GDP of Congo?
$456 per capita
Why do people continue to live near the volcano?
Benefits of fertile soil, fatalistic views
Was there any mitigation to Nyiragongo?
No preparation - people only told to evacuate 5 minutes before, international aid provided
What was the short term response to Nyiragongo?
5 minute evacuation, emergency aid supplied by Oxfam and Christian Aid
What was created following the Nyiragongo eruption?
Goma volcanic observatory
How were local people helped in the long term after Nyiragongo?
Training of local scientists, education to 70,000 children about the risks
When was the Japanese earthquake?
2011
Where is Tohoku?
Japan
What plate boundary did the Japanese earthquake occur on?
The North American and Pacific plates
How tall was the tsunami?
10m high
How high was the sea wall protecting Sendai?
10m high
How was Japan prepared for the earthquake?
Evacuation routes and warning systems, sea wall
When did evacuation occur during the Tohoku earthquake?
Only minutes before as the wave arrived quicker than expected
What is the GDP of Japan?
Just under $40,000 per capita
What were the secondary hazards of the Tohoku earthquake?
Tsunami, 700 aftershocks, fires
What was the cost of damage of the Japanese earthquake?
$300 billion
What happened at the Fukushima power plant?
It was flooded by the tsunami causing radiation leaks
How many people were left homeless after then Japanese earthquake?
500,000
How many died/missing after the Japanese earthquake?
Nearly 20,000
How much land did the tsunami flood?
500km2
How many soldiers were sent out to organise aid and rescue after the earthquake in Japan?
100,000
Where did Japan receive emergency aid from?
USA and China
How was the warning system changed following the earthquake in Japan?
A new tsunami warning system was set up
How come rebuilding after the tsunami was so rapid?
The government relaxed planning regulations
What was used whilst the Fukushima plant was inactive?
Fossil fuels
Why does Australia have bushfires frequently?
The Indian Ocean Dipole causing droughts (stuck in positive high pressure phase)
What happened in 2002 in Australia?
The Dipole got stuck in the positive phase and temperatures reached 43 degrees C
What else contributed to the wildfires (not temp)?
Low humidity, hot winds of 78mph, lots of oil-rich dry vegetation
What triggered the first wildfire?
A power line broke
How many wildfires were created over the month?
25