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Maunaloa volcano

Updated: Dec 4, 2022 08:54 GMT -
Shield volcano 4170 m / 13,681 ft
Big Island, Hawai'i, 19.48°N / -155.61°W
Current status: erupting (4 out of 5)
Last update: 3 Dec 2022 (Fissure 4 is sluggish, Fissure 3 flows still travel on flat ground)
Mauna Loa volcano with the gentle slopes of a typical shield volcano
Mauna Loa volcano with the gentle slopes of a typical shield volcano

Maunaloa (officially renamed as one word from Mauna Loa) is the world's largest and one of its most active volcanoes - a giant shield volcano on the Big Island of Hawai'i.

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Typical eruption style: Dominantly effusive.
Maunaloa volcano eruptions: 1832, 1843, 1849, 1851, 1852, 1855-56, 1859, 1865-66, 1868, 1870(?), 1871, 1872, 1873, 1873-74, 1875, 1876, 1877, 1879, 1880, 1880-81, 1887, 1892, 1896, 1899, 1903, 1907, 1914-15, 1916, 1919, 1926, 1933, 1935-36, 1940, 1950, 1975, 1984, 2022 (Nov-ongoing)

Latest nearby earthquakes

TimeMag. / DepthDistance/Location
Sunday, December 4, 2022 GMT (4 quakes)
Dec 3, 2022 6:59 pm (GMT -10) (Dec 4, 2022 04:59 GMT)
2.0

2.4 km
3.4 km (2.1 mi)
30 Km E of Honaunau-Napoopoo, Hawaii
Dec 3, 2022 4:04 pm (GMT -10) (Dec 4, 2022 02:04 GMT)
2.1

33 km
37 km (23 mi)
4 Km S of Pāhala, Hawaii
Dec 3, 2022 2:28 pm (GMT -10) (Dec 4, 2022 00:28 GMT)
2.0

2.1 km
1.5 km (0.9 mi)
Hawaii Region, Hawaii
Dec 3, 2022 2:16 pm (GMT -10) (Dec 4, 2022 00:16 GMT)
2.7

0.9 km
3.9 km (2.4 mi)
27 Km E of Honaunau-Napoopoo, Hawaii
Saturday, December 3, 2022 GMT (1 quake)
Dec 3, 2022 11:19 am (GMT -10) (Dec 3, 2022 21:19 GMT)
2.3

35 km
37 km (23 mi)
4 Km SSW of Pāhala, Hawaii
Tuesday, November 29, 2022 GMT (1 quake)
Nov 29, 2022 3:26 am (GMT -10) (Nov 29, 2022 13:26 GMT)
4.0

32 km
38 km (24 mi)
9 Km E of Pāhala, Hawaii
Monday, November 28, 2022 GMT (2 quakes)
Nov 27, 2022 11:51 pm (GMT -10) (Nov 28, 2022 09:51 GMT)
4.0

3 km
2.9 km (1.8 mi)
Island of Hawaii, Hawaii
Nov 27, 2022 10:56 pm (GMT -10) (Nov 28, 2022 08:56 GMT)
4.3

5 km
2.7 km (1.7 mi)
29 Km E of Honaunau-Napoopoo, Hawaii

Background

Mauna Loa, world's largest mountain and volcano, is a archetype of a basaltic shield volcano in its late mature stage of life, and only about 600,000-1,000,000 years old. Although not erupting as frequently as its younger neighbor Kilauea, it is also one of the most active volcanoes of the world. When it erupts, its eruptions are usually huge and produce large rivers of lava that have repeatedly threatened the town of Hilo.
Mauna Loa rises almost 9 km above the sea floor and the weight of the massive mountain has depressed the oceanic crust down by about 8 kilometers, so the whole pile of volcanic rocks produced from Mauna Loa is probably about 8+5+4=17 kilometers! It has eruptions both from its summit, occupied by a large caldera, and its NE and SW rift zones on the flanks. Almost 90% of Mauna Loa's surface is is covered by lavas less than 4000 years old, while about 50% of its surface is covered by lavas no older than about 1500 years old, while about 25% are covered by lava flows younger than about 750 years, i.,e. emplaced after the formation of the Mokuaweoweo summit caldera.


See also: Sentinel hub | Landsat 8 | NASA FIRMS

Maunaloa volcano tours

Oahu-Kauai-Maui-Hawai'i (USA)
Hawaii - Birthplace of Islands
14 days walking and study tour to Oahu, Kauai, Maui, Hawai'i
14 days / 13 nights - Moderate
Price 4990 €
31 Aug - 13 Sep 2023
Wed, 30 Nov 2022, 15:00

Mauna Loa volcano (Hawaiian Islands, USA) - Smithsonian / USGS Weekly Volcanic Activity Report for 23 November-29 November 2022 (New Activity / Unrest)

An eruption at Mauna Loa began at about 2330 on 27 November in Moku'aweoweo, the summit caldera, prompting HVO to raise the Aviation Color Code to Red (the highest level on a four-color scale) and the Volcano Alert Level to Warning (the highest level on a four-level scale). A thermal anomaly and a plume of sulfur dioxide gas were identified in satellite images at the onset of the eruption, according to NOAA's National Environmental Satellite, Data, and Information Service (NESDIS). Hawai'i Volcanoes National Park closed the summit area to visitors. ... Read all
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