Island of Hawaii

                             Mauna Loa

The Long Mountain in Hawaiian, or the Mauna Loa, which is located on the island of Hawaii. In the 1832, the Mauna Loa is erupted in 39 times, in 1984 was its last eruption. In accordance to the finding of the U.S Geological Survey(USGS), this volcano has erupted in an average of once every 6 years in the past 3000 years. The Hawaiian Volcano Observatory celebrated the 30th anniversary of Mauna Loa's last eruption on the march 25, 2014, underscoring that it has been a realtively quite 3 decades at the world's largest active volcano. The Mauna Loa is actually a big and tall mountain. Which are at 60 miles long and 30 miles wide, which makes up the half of the entire land. When we consider the flanks of Mauna Loa which sit on the sea floor which is about 5,000 M, (16,400 ft) deep, and in this the height of these volcano is relative to the sea floor or to the neighboring land which is like 9,170 m (30,080 ft). The largest active volcano in the wold is the Mauna Loa. We know all large land masses, mountains also push down the Earth's crust because of there enormous weight, so the Mauna Loa the sea floor on which it sits is depressed by additional 8000 m (26,000 ft). So if we want to say the thick at its center which makes the lava pile that make up by the Mauna Loa, we must also consider to add its above sea level height, and the thickness of its depression in the Pacific sea floor. After experiencing a brief swarm deep long period earthquake the summit of Mauna Loa began inflating slowly between 2002 and 2005 after a decade of slight deflation. Earthquakes activity increased in early July 2004 and continued through Fall 2004, but then slowed significantly throughout 2005 and remained at a level of about 10 a week. Activity peaked in Sept. 2004 (for instance, there were more than 350 "long-period" earthquakes beneath Mauna Loa’s summit and the upper southwest rift zone during the first week of that month, most which were deep (35 to 50 km) below the ground surface). That earthquake swarm was the greatest number of such earthquales since the beginning of the modern HVO earthquake catalog in the 1960s. HVO scientists continue to monitor the volcano closely. In an HVO press release on 26 Mar 2009, Frank Trusdell, an HVO geologist who has studied the volcano for nearly two decades, is quoted as saying that "Mauna Loa will erupt again, and there's a good chance that it will be during your lifetime." He and others are interesting in alerting Big Island of Hawaii residents about how to live safely and be aware of the potential hazards posed by Mauna Loa. Mauna Loa is a "shield volcano", which means it is a gently sloping mountain produced from a large number of generally very fluid lava flows. The volcano has been erupting for at least 100,000 years (possibly more) from a primary volcanic center that is presently manifested by Moku'aweoweo crater at the mountain's summit. It has produced both a'a and pahoehoe flows, and lesser amounts of pyroclastic deposits. The volcano is constructed of a rock type known as tholeiitic basalt. Mauna Loa shares the Hawaiian hot spot with its smaller active siblings Kilauea and Loihi seamount. The oldest remnants of subaerial Mauna Loa are to be found in an interesting rock formation known as the "Ninole Volcanic Series". It is a series of steep-sided hills, consisting of thin layers of pahoehoe and a'a lava. These hills form the so-called "Ninole Shield" which is thought to be either the remnants of a pre-Mauna Loa volcano, or uplifted blocks of old Mauna Loa from within the Honuapo-kaoiki fault system. Either way, they are some of the oldest exposed rocks on the southern part of the island.

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