![]() In an HVO press release on, Frank Trusdell, an HVO geologist who has HVO scientists continue to monitor the volcano closely. That earthquake swarm was the greatest number of such earthquales since the beginning of the modern HVO earthquake catalog in the 1960s. 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). This doesn't mean an eruption is imminent, but signs are consistent with magma entering the shallow part of the magmatic system at the volcano.Įarthquakes 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. Im late Aug 2015, HVO raised the alter level at Mauna Loa because of long-term increased seismicity rates and inflation of the summit (as measured by cross-caldera difference). Then inflation slowed again in 2006, ceased in late 2009, and resumed slowly in late 2010, continuing through mid-2015 (i.e., to date). Inflation wasn't constant, with slowdowns in winter 2002-2003, Spring 2003, and since sept 2005.īut, inflation was fairly steady in 2004 and the first half of 2005 following a more intense swarm of several thousand deep earthquakesin late 2004, all of which suggested that the magma reservoir within the volcano was swelling. The summit of Mauna Loa began inflating slowly between 20 after a decade of slight deflation, after experiencing a brief swarm of deep long-period earthquakes. "How high is Mauna Loa volcano" at the HVO website. For more details about estimation of theĪctual thickness of Mauna Loa volcano, see the write up on Height, and the thickness of its depression in the Pacific sea floor. Would need to add its above sea level height, its sea floor to sea level Thick (at its center) is the lava pile that makes up Mauna Loa, one So, directly beneath Mauna Loa, the sea floor on which it sits is depressedīy and additional 26,000 ft (8000 m). In the Himalaya mountain range, sit higher relative to sea level).Īll large land masses (such as mountains)Īlso push down upon the Earth's crust due to their enormous weight. Height, it is one of the tallest mountain in the world (although Is more like 30,080 ft (9,170 m)! Mauna Loa is the largest active The "height" of this volcano relative to neighboring land (the sea floor) Of Mauna Loa sit on sea floor that is about 16,400 ft (5,000 M) deep, How Tall? Mauna Loa is a REALLY tall and big mountain.Īt 60 miles long and 30 miles wide, it makes up half of the entire island. ![]() Learn all about the hazards associated with this eruption history at the HVO website The view is looking towards the west, with Hilo qt the bottom center, Kilauea at left, and Kona coast on the north. The image at right shows Mauna Loa lava flows since 1832 (warm colors) overlain on a 3-d digital elevation model. Since 1843 it has erupted 33 times producting lavas that have covered over 800 km 2. How active? Mauna Loa is one of Earth's most active volcanoes. Underscoring that it has been a realtively quite 3 decades at the world's largest active volcano. The Hawaiian Volcano Observatory celebrated the 30thĪnniversary of Mauna Loa's last eruption (in 1984) on March 25, 2014, Since 1832, Mauna Loa has erupted 39 times its last eruption was in 1984.Īccording to USGS estimates, the volcano has erupted an average of once everyĦ years over the past 3000. Seamount, some 30 km or so to the south). (4,170 m) above sea level (this photo was taken from over Loihi ![]() Hawaiian, is located on the island of Hawaii. Tweets about Mauna Loa Loa, or "Long Mountain" in (image from USGS HVO website)įollow site author on Twitter and see his recent Mauna Loa erupted from NE rift zone vents high on the volcano in the early AM of 6 July 1975 lava flowed toward Mauna Kea. (Edited and color balanced image from USGS HVO image library) Mauna Loa lava flows tend to be larger and move faster than at nearby Kilauea.
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