Geo volcanoes

Ocean ridges

Where plates move apart and magma rises

Subduction zones

Where an oceanic plate sub ducts under continental plate

Rift valleys

Where constructive plate margins occur in continental areas

Hot spots

Volcanically active areas not on plate margins

1500

Amount of active volcanoes

23mm

How far mid Atlantic ridge diverges per year

Nuees ardentes

Dense pyroclastic flows

Lahars

Fast flowing volcanic mudflows

3000

How many small earthquakes preceded Eyjafjallajökull

317,000

Iceland population

800

How many people needed to be evacuated at Eyjafjallajökull

£32,000

EU GDP per capita in 2010

20/3/2010

When Eyjafjallajökull erupted

107,000

How many flights were cancelled by Eyjafjallajökull in the first 24 hours

£130 million daily

How much money airlines were losing

20%

How much of the Kenyan economy is based on exports of green vegetables

7 million

How many passengers were stranded worldwide

20,000

How many evacuated at pinatubo

847

How many dead at pinatubo

10,000

How many homeless at pinatubo

19km

Height of pinatubo ash cloud

4

VEI of Eyjafjallajökull

6

VEI of pinatubo