Volcanos

Some facts about Thinking about volcanos people imagine a moutain toped with a smoking crater.

But it doesn’t always look like this. They may be very different.

Some blaze with fire, other throw clouds of ashes, steam and ashes up high in the sky.

Some blow up with terrible noise, some just hiss quietly.

Some are flat and wide, some are high and steep. It’s not easy to say if volcano is active or dormant.

Active ones Are blowing up constantly or have been blowing up not long ago.

To be called active exhaling hot ashes or gases or spilling out lava is enough.

Nowadays it’s about 600 active volcanos on Earth. e.g. Etna in Italy, Hekla on Iceland, St, Helens in USA

Mount Hekla (eksplosion in 1991) Active volcanos Etna

Italy. On the east coast of Sicilia.

Nowadays the most active volcano in Europe.

Height - about 3340m above sea level.

Has many side craters.

Developed approximately half million years ago.

It’s supposed it blew up about 200 times since then. Dormant volcanos

Were active in history, but it doesn’t mean they will not explode someday against all expectations.

They can exhale only cold gases.

They can become active again even after thousends of years and then they eruption is very violent.

e.g. Fuji in Japan, Mouna Kea Amazing clouds over Fuji on Hawaii, Orizaba in Mexico. Dormant volcanos

Orizaba

Mexico

The highest mount in Mexico Hight – 5636 m above sea level.

It has three craters.

It’s cover by forest.

Top is covered by glacier. Extinct volcanos. Have been active very long ago and they should not explode ever again, but you can’t be hundred percent sure.

People living on isle Tristan da Cunha were suprised in 1961 by eksplosion volcano which was meant to be extinct. e.g. Mount Ararat in Turkey, Kilimanjaro in

Tansania, Mount St. Mount Sleza in Poland Anna in Poland, Elbrus in Russia Extinct volcanos

Mount Ararat

Turkey, near the border with Armenia and Iran.

Height – 5137m above sea level.

Covered with glacier. LOCALISATION

Volcanos a mostly located on borders of continents and over hot spots under continents e.g. Hawaii and Easter Isle on Easter Isle Pacific Ocean, Iceland, Azores on Atlantic, Yellowstone in USA

Hawaii LOCALISATION

Vast majority of volcanos is located on ocean’s bottom. They are mostly small and not dangerous, hidden undersea surface along underwater mountains.

Only some of them are visible over waves (e.g. Tamu Massif, the biggest extinct volcano on Earth, bottom Pacific Ocean. Last time erupted about 144 millions years ago ) LOCALISATION

The biggest group of most active and dangerous volcanos forms so called Ring of Fire around Pacific Ocean. LOCATION OF VOLCANOES RING OF FIRE

Thank you

for

watching

Greg D.