Sunday, February 13, 2011

The volcanoes in Hawaii are safe.

The volcanoes of Hawaii are considered safe by geologists, due to the fact that they’re always venting. A volcano that holds all of that pressure inside is like a natural time bomb, but the Hawaiian variety have no problem belching out hot magma and smoke from time to time. 
fast-lava-flow
Credit:http://www.bigislandhawaii.org/volcanoes

But there was a PBS documentary which identified a volcano in Hawaii, Kilauea,as the most dangerous volcano in the world. Eruptions of Kilauea are very amazing and spectacular, although relatively few people have been killed by its eruptions, as it is ussually possible to get out of its way.

Credit: http://www.ldeo.columbia.edu/users/menke/talks/dangerous_volcano_files/dangerous_volcano.html

Names of the volcanoes on Hawaii that are active,dormant and extinct.

Volcanoes of Hawaii.

Active volcanoes 
  • Kilauea Volcano 
    Its is is the youngest volcano on the Big Island of Hawaii, and it is one of the most active volcanoes in the world. 
Kilauea volcano, Hawaii, the world's most beautiful volcano.  Credit:http://dyezra.blogspot.com/2010_05_01_archive.htm
  •          Mauna Loa Volcano

    This huge volcano covers half of the Big Island of Hawaii. It has erupted 33 times since its first documented eruption in 1843, and its most recent eruption was in 1984. 
                
Credit:http://climatehistories.innerasiaresearch.org/?page_id=112
  •        Hualalai

    This volcano on the west central coast of the Big Island is the third most active volcano on that island. Hualalai last erupted in the early 1800's.
The Summit of the Hualalai Volcano.
Credit:
http://www.drgeorgepc.com/Earthquake2006Hawaii.html
  •          Lo'ihi

    This Hawaii's youngest active undersea volcano. It is located on the sea floor south of Kilauea, about 30 miles off shore.
1 of the 5 most devastation underwater volcanoes
Credit:http://www.weirdlyodd.com/5-most-devastating-underwater-volcanoes/
 Dormant 
  •  East Maui Volcano (Haleakala)
    This volcano on the island of Maui is considered domant, since it last erupted sometime between 1500 and 1800, but it is not yet considered extinct.
Credit:http://hippobean.blogspot.com/2006/11/east-maui-volcano.html

  •       Mauna Kea

    This volcano located on the north coast of the Big Island is the tallest volcano in Hawaii. It probably began forming about 1 million years ago, and its most recent eruption was probably between 4,000 and 6,000 years ago.
Extinct
·        

  •      Kohala

    This volcanoon the northwest tip of the Big Island is the oldest volcano on that island. It emerged above sea level about 500,000 years ago and it last erupted about 120,000 years ago.
     
Credit:http://satftp.soest.hawaii.edu/space/hawaii/nav/ap.kohala.html

  •         Maui - West Maui Volcano
    The West Maui Volcano is the smaller of the two on Maui. It is considered to be extinct and is often referred to as the West Maui Mountains.
  •          Molokai - West Molokai Volcano
  •          Molokai - East Molokai Volcano
  •         Oahu - Koolau Volcano
  •          Oahu - Waianae Volcano
  •         Kauai Volcano

    It is a
    extinct volcanoes, last eruption: 400,000 years ago!
Credit:http://michaeljacksondied.in.com/10-000-ft-volcano/photos-1-1-1-76731731ceb654e771ccda83a7b52a76.html
  •       Kahoolawe Volcano

    Kahoolawe
     has not erupted in historic time and is considered to be extinc
Credit:http://volcano.oregonstate.edu/vwdocs/volc_images/north_america/hawaii/kahoolawe.html
  •       Lanai Volcano

    Located on the island of Lanai, the Lanai Volcano is an extinct volcano that last erupted 1.2 million years ago
  •          Niihau Volcano

    Niihau consists of one extinct volcano that had a large landslide to the east.




     

How the volcanoes on Hawaii were formed?

Credits: http://library.thinkquest.org/J003007/Disasters2/volcano/formed/formed.htm



The Hawaiian Islands were formed over a hotspot. Places where hot magma currents rises from deep in the earth are called hotspots. Rising magma from the center of the earth rises to the crust of the earth. When it encounters solid rock and cannot force it aside, the magma collects and pressure builds. Once in a while some pressure is let go, magma escapes, and eruptions happen. After many underwater eruptions, the volcano builds an underwater mountain. The mountain grows with each eruption and when it rises above sea level, it becomes an island.

Credits: http://library.thinkquest.org/J003007/Disasters2/volcano/formed/formed.htm




The oldest major Hawaiian island, Kauai, was formed over the hotspot 6 million years ago. The Pacific plate drifted away from the hotspot, the Kauai volcanoes died out, and another volcano rose in its place to create the island of Oahu.
Credits: http://library.thinkquest.org/J003007/Disasters2/volcano/formed/formed.htm




The process repeated and created a chain of similar islands. The volcanoes on the islands of Kauai and Oahu are extinct. Haleakala, on the island of Maui, is a dormant volcano. Volcanologists say that it is "due" for an eruption soon (within 100 years).
Credits: http://library.thinkquest.org/J003007/Disasters2/volcano/formed/formed.htm




The island of Hawaii has 3 active volcanoes -- Hualalai, Mauna Loa, and Kilauea at 4,000 feet on the southern slope of Mauna Loa. Kilauea is the most active and its crater, Hakema'uma'u, is the Hawaiian volcano goddess' (Pele) home. South of Hawaii, the seamount of Loihi is building and will become another island in 10,000 years.

Where is Hawaii located?

Hawaii, a land of crystal clear sea, and sun kissed beaches covered with pristine white sands, is situated on an archipelago in the central region of the Pacific Ocean. The archipelago is a section of the Polynesian sub-region of Oceania. It is located on the southwest region of the continent of North America. The location of Hawaii is on the southeastern side of Japan, and the north eastern side of Australia. Interestingly, Hawaii is the only state among the 50 states that is not located on the mainland.

 
Credit: http://coffee.wikia.com/wiki/Coffee_industry_of_Hawaii