The Hilina Slump is outlined in red.

The Hilina Slump is a 4,760 cubic mile (20 kilometre³) chunk of the big island of Hawaii on the south slope of the Kilauea volcano which is breaking away from the island and slipping into the Pacific Ocean at an average rate of 4 inches (100 mm) per year. The State of Hawaii ( or həˈwaɪʔiː Hawaiian: Mokuāina o Hawaii) is a state in the United States located on an Archipelago in the Kīlauea (kiːlauea is an active Volcano in the Hawaiian Islands, one of five Shield volcanoes that together form the Island of Hawai{{okina}}i Plate tectonics and hotspots Divergent plate boundaries At the The Pacific Ocean is the largest of the Earth 's Oceanic divisions The slump has the potential of breaking away at a faster pace in the form of an underwater landslide. A landslide is a geological phenomenon which includes a wide range of ground movement such as rock falls deep failure of slopes and shallow debris flows which can occur In Hawaii, landslides of this nature are called debris avalanches. A landslide is a geological phenomenon which includes a wide range of ground movement such as rock falls deep failure of slopes and shallow debris flows which can occur If the entire Hilina Slump did slide into the ocean at once, it could cause an earthquake in excess of a 9 in magnitude and a tsunami 1,000 feet (300 m) tall, threatening the entire Pacific Rim. An earthquake is the result of a sudden release of energy in the Earth 's crust that creates Seismic waves Earthquakes are recorded with a Seismometer A tsunami ((tsuːˈnɑːmi is a series of waves created when The Pacific Rim refers to the countries and cities located around the edge of the Pacific Ocean.

On April 2, 1868, an earthquake in this area with a magnitude estimated between 7. Events 68 - Galba, Governor of Hispania, names himself legatus senatus populique Romani, breaking the line of Year 1868 ( MDCCCLXVIII) was a Leap year starting on Wednesday (link will display the full calendar of the Gregorian Calendar (or a Leap 25 and 7. 75 rocked the southeast coast of Hawaii. It triggered a landslide on the slopes of the Mauna Loa volcano, five miles north of Pahala, killing 31 persons. Mauna Loa is the largest volcano on earth and one of five volcanoes that form the Island of Hawaii in the U Plate tectonics and hotspots Divergent plate boundaries At the Pāhala is a Census-designated place (CDP in Hawai{{okina}}i County Hawai{{okina}}i, United States. A tsunami claimed 46 additional lives. The villages of Punaluu, Ninole, Kawaa, Honuapo, and Keauhou Landing were severely damaged. For the black sand beach on the Big Island, please see Punaluu Black Sand Beach. According to one account, the tsunami "rolled in over the tops of the cocoanut trees, probably 60 feet high . . . inland a distance of a quarter of a mile in some places, taking out to sea when it returned, houses, men, women, and almost everything movable. "^[1]

On November 29, 1975, a 37 mile (60 km) wide section of the Hilina Slump plunged 11 feet (3 m) into the ocean, widening the crack by 26 feet. Events 1777 - San Jose California, is founded as el Pueblo de San José de Guadalupe Year 1975 ( MCMLXXV) was a Common year starting on Wednesday (link will display full calendar of the Gregorian calendar. This movement caused a 7. 2 magnitude earthquake and a 48 foot (15 m) high tsunami. Oceanfront properties were washed off their foundations in Punaluu. Two deaths were reported at Halape, and 19 other persons were injured.

References

1. ^ Tsunami! by Walter C. Dudley (ISBN 0-8248-1125-9)

External links

• Science Frontiers article: The hilina slump also known as "the big crack"
• University of Hawaii report on the slump