Leads to loss of lives and property. Causes rising and lowering of the sea floor. Displaces parts of the earth’s crust. Causes landslide leading to devastation of cities or towns. Causes elevation of Coastal areas e.g. Coast of Alaska.
Great Lisbon earthquake, 1St NOV 1755 that claimed over 60,000 lives and buildings. San-Francisco earthquake 1906. Agadir Morocco in 1906 Yokohama and Tokyo city earthquake, 1St Sept, 1923 that claimed millions of lives and buildings. Kansu earthquake, China, 1920 and 1927. Iran 1968 Mexico in 1973. Nicaragua – Central America in Dec. 1972. Italy Earthquake …
EARTHQUAKES means the sudden shaking or vibration in the earth’s crust, which is caused by fracturing and cracking. They occur when natural forces shake the earth’s crust as a result of disturbance within and below the earth crust thus leading to landslide. Seismograph is the instrument used to measure and record information about earthquakes.
Volcanoes are frequently experienced in areas where folding and faulting had taken place. Such areas include: Along the coastal mountain of which consists of the offshore Island and in the midst of oceans. Around the pacific Islands and the cascade mountains of USA. Around the Rift Valley region in East Africa. Around the Atlantic Coast …
The nature of the vent-Is it linear or central vent? The type or nature of the lava -Is it a mobile or viscous lava? The character of the earth crust through which the lava escapes.
Volcanic eruption can be classified into three namely Active, Dormant and Extinct volcanoes: Active Volcanoes are volcanoes that are still and frequently erupting e.g. Cameroon Mountain, Fujuyama in Japan etc. Dormant Volcanoes are volcanoes that show sign of eruption in future: e.g. St. Helen, Canary Islands and Cape Verde Islands. Extinct Volcanoes are volcanoes that …