active or active volcanoes are the subject of many discussions volcanologists.Scientists have expressed their different views and ambiguous point of view on this definition.Some propose to refer to those active volcanoes, the eruption of which there is at the moment, as well as those that exhibit various signs of activity.This can be increased or abnormal seismic activity as well as an increase in fumarole activity.For other professionals active volcanoes - the ones that erupted in historical time.Different regions are monitoring the volcanic activity at certain time intervals, and they in turn are very different.It may be 200 and 3000 years.
There is a program for the study of global volcanism.It carried the world's largest museum complex and research - the Smithsonian Institution.Participants of the program decided that the volcano should be considered valid, if the eruption occurred in the last 10,000 years of history.
Currently, the Globe has about 1,500 active volcanoes activity.Each year, about 50 of them erupt, thus emits large amounts of toxic gases, ash, steam and lava.Accompanied by earthquakes, they can cause irreparable damage.In 2011, the world's active volcanoes erupted in Japan, Chile, Italy, Iceland and Indonesia.Most current or active volcanoes is concentrated in Hawaii and Alaska.
volcanoes, dormant for decades, can suddenly wake up, as it was in the south central part of Chile.Europe's highest volcano Etna, located on the island of Sicily, erupted lava flows in the summer of last year.
Active volcanoes attract great attention of tourists.Being in an uninhabited part of the Virunga National Park, Democratic Republic of the Congo without posing danger to the endangered mountain gorilla, the fall of 2011 became more active volcano Nyamulangira.He drew a large number of tourists with its spectacular views of slowly flowing rivers of molten lava.It is beautiful and at the same time terrifying.Nature does not get tired periodically remind about their rights and that it is not a lifeless object of consumption.These reminders come in the form of disasters, one of the causes of which are active volcanoes in the world.
Powerful Pacific ring of volcanoes includes a large element of Kamchatka with 28 and 39 Kuril volcanoes.A large number of them hidden under the water.In the inactive state, they look pretty peaceful, but do not forget about the processes occurring in their interiors.One of the largest active volcanoes in Kamchatka is Sheveluch, but the highest active volcano in Eurasia is located in Kluchevskoy.From the very beginning of its activities and to the present time it is not known long periods of decay.Perfectly symmetrical, snow-covered volcano is often called the "fiery mountain".Its height varies after successive eruptions.The last happened in 2009, brought him to the top of the 5000 meter mark.
Columbia Nevado del Ruz - the highest active volcano, located in the Andes, and the Ojos del Salado is the highest in the world.It is located on the border of Chile and Argentina in South America.The base diameter is 30 km, and the height of the various data ranges from 6880 m to 6908 m.
Volcanoes may be not only "hot", but the "cold" or mud.In Azerbaijan, a representative of Gobustan, which is considered curative.
Active volcanoes extremely interesting, as confirmed by numerous facts.For example, it is known that the eruption accelerate the evolutionary process, and climatic conditions on the planet have changed many times due to the volcanic activity.Animals and plants had evolved, adapting to these changes.
