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We decided to go to Hawaii.
Reasons:
Because there are many islands there to choose from and many places to sightseeing. ''We are also going to Oahu, the island in Hawaii that gives us tons of oppoturnities to shopping. Especially, our mother, if she knows this, she defitnitely would go as she loves shopping.''
Hawaii weather suits us too! ''Especially the Big Island. The weather there does not rain and gives us shinning sunny warm sun while we're under the blue sky''
Hawaii is always festive.
And the volcanoes there around those islands are almost safe.
By volcano activity Active Volcanoes: Active volcano is dangerous as active volcano is volcano that had erupt recently.
Currently, there are 2 active volcanoes in Hawaii, known as Mauna Loa and Kilauea. The video of Volcano Kilauea erupting:
Dormant Volcanoes: Not so safe, and not so dangerous as dormant volcano had not erupt for a long time but it shows signs of possible eruption in the future.
Extinct Volcanoes: Safe as it had not erupt for a thousand of years and it lost traces of volcanic activity.
By the structure of volcanoes: Shield Strato
The Big Island is made up of Five Shield Volcanoes: Kohala, Mauna Kea, Hualalai, Mauna Loa, and Kilauea. The difference between a Shield Volcano and the more common Strato Volcano is the way that the Volcanoes are formed. Sheild Volcanoes lava is of a lower viscosity, meaning that it is thinner and more fluid. This makes the eruptions less volatile, as pressure does not build up as much. Or shield volcano looks like a soldier's shield, and that is how it got its name. It's slopes are made by liquid basalt lava that pushes up from a vent under the ground. Shield volcanoes do not have sharp steep slopes. They are the largest volcanoes on Earth. Stratovolcanoes have steep sides with cones that stick out like huge bumps. They are built up when eruptions of viscous lava, tephra, and pyroclastic flows happen. It takes thousands of years for the pressure to build up enough in stratovolcanoes to cause an eruption. More than one kind of magma builds up in stratovolcanoes. They are basalt, andesite, dacite, and rhyolite magma. All of those magmas cause explosive eruptions except basalt magma. There are a lot of different vents around stratovolcanoes. Some of the vents are cinder cones and domes low on the sides of the volcano. Sometimes stratovolcanoes are called compositecones. The slopes of a Sheild Volcano are long and Broad. The pictures below illustrate this pretty clearly. All Volcanoes in Hawaii are Sheild Volcanoes. Below the pictures are some links with more info on sheild volcanoes and strato volcanoe.
Hawaii is positioned in the pacific 'ring of fire' which refers to the borders of the pacific tectonic plate. The mantle of the earths core is constantly moving and shifting creating outlets for the hot molten rock and gasse's beneath the surface of the earth. The molten rockor lava finds its way to the surface through cracks in these plates especially where they border other plates, creating a buildup of lava that eventually emerged from the ocean floor, creating the Hawaiian islands and other volcanic islands in the Pacific ocean. Some of these volcanoesare among the most active in the world. ''Volcanoes in Hwaii are formed by hot spots. Hot spots are areas of constant volcano activity. They are derived from unusually hot areas in the mantle. The overlapping mantle forms plumes of magma that rise and form volcanoes.''
Magma Chamber – A magma chamber is a large underground pool of molten rock sitting underneath the Earth’s crust. This magma is less dense than the surrounding mantle and so it seeps up to the surface through cracks and flaws in the crust. When it reaches the surface, it results in a volcanic eruption.
Lava – Lava is the rock expelled from a volcano during an eruption. When it first comes out, the lava can have a temperature higher than 700 degrees C. It then flows downhill from the eruption point until it cools and hardens.
Main Vent – A volcano’s main vent is the point in the Earth’s crust where hot magma has reached the surface. The familiar cone-shaped volcano builds up as ash, rock and lava ejected during eruptions fall back to Earth around the vent.
Crater – A volcanic crater is a circular depression in the ground caused by volcanic activity. A volcano’s vents are located at the bottom of the crater.
Pyroclastic Flow – Pyroclastic flows are fast moving currents of hot gas and rock with travel down hill from a volcano, reaching speeds of 700 km/hour. The gas can reach temperatures of more than 1,000 degrees C, and is one of the greatest dangers from volcanic eruptions.
Ash Cloud – Volcanic ash consists of small pieces of pulverized rock and glass created during volcanic eruptions. These fragments are so small, and heated to such a temperature that they can be carried in the air for many kilometers.
Volcanic Bombs – Volcanic bombs are chunks of lava blasted into the air which solidify before they reach the ground. Some bombs can be extremely large, measuring 5-6 meters in diameter and landing more than 500 meters from the volcanic vent.
Secondary Vent – On large volcanoes, magma will reach the surface through several different vents, and not just the main vent. This can form cones, eject lava, and cause destruction.
Secondary Cone – Secondary cones build up around secondary vents on larger volcanoes.
The state of Hawaii is made up of a group of volcanic islands. It is located in the central Pacific Ocean.
Map of Hawaii:
Flag of hawaii:
Meaning of the flag ''
The canton of the flag of Hawaiʻi contains the Union Flag of the United Kingdom, prominent over the top quarter closest to the flag mast. The field of the flag is composed of eight horizontal stripes symbolizing the eight major islands (Hawaiʻi, Oʻahu, Kauaʻi, Kahoʻolawe, Lānaʻi, Maui, Molokaʻi and Niʻihau). A ninth stripe was once included representing the island of Nihoa.[citation needed] The color of the stripes, from the top down, follows the sequence: white, red, blue, white, red, blue, white, red. The colors were standardized in 1843, although other combinations have been seen and are occasionally still used.[1][2]
