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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)
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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
Typical eruption style:
Dominantly effusive.
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Volcano news: Mauna Loa volcano (Big Island, Hawaii)

Mauna Loa volcano (Hawai'i): HVO weekly report

Thursday Jul 30, 2020 22:31 PM | BY: MATTHEW
Location of earthquakes under Mauna Loa over the past week (C) U. S. Geological Survey
Location of earthquakes under Mauna Loa over the past week (C) U. S. Geological Survey
The depth of earthquakes under Mauna Loa over the past week (C) U. S. Geological Survey
The depth of earthquakes under Mauna Loa over the past week (C) U. S. Geological Survey
Tiltmeter data from Mauna Loa (C) U. S. Geological Survey
Tiltmeter data from Mauna Loa (C) U. S. Geological Survey
The Hawaiian Volcano Observatory recorded 105 small-magnitude earthquakes on Mauna Loa’s summit and upper-elevation flanks over the past week. Most of these earthquakes occurred at shallow depths of less than 8 kilometers (~5 miles) below ground level.

There is continued slow summit inflation, consistent with magma supply to the volcano's shallow storage system. Gas concentrations and fumarole temperatures at the Summit and Sulphur Cone monitoring sites remain stable (below 2 ppm SO2, ~98 C respectively). Webcams show no changes to the landscape.
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Links / Sources:
  • https://volcanoes.usgs.gov/vhp/updates.html#calvo
Previous news
Friday, Jun 05, 2020
Middle part of Southwest Rift Zone at Mauna Loa volcano (image: HVO)
During the past week the Hawaiian Volcano Observatory (HVO) recorded 65 small-magnitude earthquakes on the volcano's summit and upper-elevation flanks. Most of these earthquakes occurred at shallow depths of less than 8 km (~5 miles) below ground level. The largest earthquake was with magnitude M 3.2 event that occurred below the volcano's Southwest Rift Zone on 2 June. ... read all
Tuesday, May 26, 2020
Southwest Rift Zone at Mauna Loa volcano (image: HVO)
During the past week the Hawaiian Volcano Observatory (HVO) recorded 63 small-magnitude earthquakes on the volcano's summit and upper-elevation flanks. Most of these earthquakes occurred at shallow depths of less than 8 km (~5 miles) below ground level. ... read all
Saturday, May 16, 2020
The Hawaiian Volcano Observatory (HVO) recorded 92 small-magnitude earthquakes on Mauna Loa’s summit and upper-elevations. Most of these earthquakes occurred at shallow depths of less than 8 kilometers (~5 miles) below sea level. Slow summit inflation continues which HVO claim is “consistent with magma supply to the volcano's shallow storage system.” Gas concentrations and fumarole temperatures remain stable. ... read all
Friday, May 15, 2020
Southwest Rift Zone at Mauna Loa volcano (image: HVO)
During the past week the Hawaiian Volcano Observatory (HVO) recorded 92 small-magnitude earthquakes on the volcano's summit and upper-elevation flanks. Most of these earthquakes occurred at shallow depths of less than 8 km (~5 miles) below ground level. ... read all
Monday, May 11, 2020
Southwest Rift Zone at Mauna Loa volcano (image: HVO)
During the past week the Hawaiian Volcano Observatory (HVO) recorded 74 small-magnitude earthquakes on the volcano's summit and upper-elevation flanks. Most of these earthquakes occurred at shallow depths of less than 8 kilometers (~5 miles) below ground level. ... read all

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