Eruptions from the Mauna Loa volcano created its gentle slopes.Scientists use the The Richter scale for measuring eruptions and the most recent eruption in 1984. The 1984 eruption on the 13,680-foot volcano’s southeast flank produced a river of lava that came within four miles of the upper slopes of Hilo before stopping. In the first half of the 20th century Mauna Loa's eruptions destroyed villages and its most recent eruption occurred in 1984, threatening Hilo, a city built on lava flows dating to the 1800s. No recent eruptions of the volcano have caused fatalities, but eruptions in 1926 and 1950 destroyed villages, and the city of Hilo is partly built on lava flows from the late nineteenth century. Some of the complexities of actual lava flows are illustrated using the main flow system of the 1984 Mauna Loa eruption. The two rift zones are historically very active, sending out flows toward the city of Hilo in 1984 and South Kona in 1950 respectively. A series of 33 radial vents also extend to the northwest. The implications of the results to planetary geology are clear. I grew up on the Big Island of Hawaii. Mauna Loa as seen from the air. It’s been 30 years since Mauna Loa — the largest active volcano in the world — last erupted sending within 4.5 miles of Hilo. Within 2 to 3 hours, 80% of the crater was covered by lava and there was concern that lava might flow from the crater toward MLO. The 1984 Mauna Loa eruption began at about 1:30 a.m on March 25, with lava fountaining in the southwest corner of the summit crater. Hualālai is visible in the background. Mauna Loa's most recent eruption occurred from March 24, 1984, to April 15, 1984. In planetary geology, lava flows on the Moon and Mars are commonly treated as relatively simple systems. It was a 6.0 and the damage costed about 2.300,000,000 dollars. Mauna Loa awoke in the early morning hours 24 years ago this week, March 25, 1984.. Mauna Loa's July 1975 eruption was forewarned by more than a year of seismic unrest, with the HVO issuing warnings to the general public from late 1974; the 1984 eruption was similarly preceded by as much as three years of unusually high seismic activity, with volcanologists predicting an eruption within two years in 1983. Volcanic Air Pollution. The outline, brief narrative, and results given are based on a number of sources. Although Mauna Loa has been quiet since 1984, its sister volcano, Kilauea, continues to spew lava on an ongoing basis, producing what is known as "vog," or volcano smog. 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mauna loa eruption 1984

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