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Random pictures
Mauna Loa volcano with gentle slopes typical of a shield volcano.
Mauna Loa volcano with gentle slopes typical of a shield volcano.

Mauna Loa activity update:
Source: US Geological Survey
Saturday, Oct 05, 2019
During the past week, approximately 40 small-magnitude earthquakes (all smaller than M2.5) were detected beneath the upper elevations of Mauna Loa. Most of the earthquakes occurred at shallow to intermediate depths of less than 10 km (~6 miles) below ground level. ... [more]
Earthquakes under Manua Loa during the past week (image: HVO / USGS)
Wednesday, Jul 03, 2019
The alert level for the volcano has been raised to yellow two days ago. This doesn't mean that an eruption is expected to occur in a near future, but acknowledges that the volcano is currently preparing itself for its next eruption, which will come, sooner or later, but currently without possibility to indicate a specific time frame. ... [more]

Mauna Loa volcano

Shield volcano 4170 m / 13,681 ft
Big Island, Hawai'i, 19.48°N / -155.61°W
Current status: restless (2 out of 5)
Mauna Loa webcams / live data | Reports
Mauna Loa volcano books | Tours
Last update: 5 Oct 2019 (Seismicity above background, continued summit inflation. Volcano is not erupting.)
Typical eruption style: Dominantly effusive.
Mauna Loa 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
TimeMag. / DepthDistanceLocation
Mon, 14 Oct 2019
Mon, 14 Oct 01:02 UTCM 2.0 / 1.6 km7 km23km E of Honaunau-Napoopoo, Hawaii (USA)
Sat, 12 Oct 2019
Sat, 12 Oct 17:56 UTCM 2.3 / 1 km4 km26km E of Honaunau-Napoopoo, Hawaii (USA)
Fri, 11 Oct 2019
Fri, 11 Oct 15:03 UTCM 2.7 / 1.7 km2 km28km E of Honaunau-Napoopoo, Hawaii (USA)
Fri, 11 Oct 09:09 UTCM 2.1 / 1.5 km12 km22km ESE of Honaunau-Napoopoo, Hawaii (USA)
Thu, 10 Oct 2019
Thu, 10 Oct 06:58 UTCM 1.3 / 1.3 km1 km27km E of Honaunau-Napoopoo, Hawaii (USA)
View all recent quakes
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.


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.

Mauna Loa Photos:

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