“That could of course change in the future, but we’re using this as an opportunity to encourage people on the Island of Hawai‘i, especially in areas that could be impacted by an eruption, to revisit their (emergency) plans,” she said. The volcano’s alert level hasn’t changed from advisory since 2019 and Mulliken said the observatory sees no signs of an imminent eruption. ![]() “Signals that have preceded eruptions include upward migration of earthquakes, sustained strong harmonic tremor, accelerated deformation and overall increase in earthquakes.”īecause of that heightened unrest, however, the Hawaiian Volcano Observatory changed its messaging from weekly to daily updates. “The locations of recent shallow earthquakes are similar to those prior to the 19 Mauna Loa eruptions, but other precursory signals are missing,” according to the Frequently Asked Questions about Mauna Loa Volcano. However, no significant surface deformation has been seen in the past week. Global positioning system instruments at the summit and on the volcano’s flanks also continue to measure inflation at rates elevated since mid-September. Both regions have historically been seismically active during periods of unrest on Mauna Loa. The update said 43 small-magnitude earthquakes from 2-3 miles below Mokuʻāweoweo caldera and 4-5 miles beneath the upper-elevation northwest flank of Mauna Loa were detected from Thursday to Friday. “As the reservoir expands, it is triggering small earthquakes directly beneath Mokuʻāweoweo caldera and in a region just to the northwest of the caldera.” “The unrest is likely caused by renewed input of magma into Mauna Loa’s summit reservoir system,” the observatory said in its Mauna Loa daily update Friday. Seismic activity below the volcano’s summit and caldera spiked in late September, with Hawaiian Volcano Observatory instruments recording as many as 100 quakes a day at certain points. It’s been nearly 40 years since the volcano last erupted and it has been in a period of heightened unrest since September. Geological Survey Hawaiian Volcano Observatory monitoring Mauna Loa is no reason for travelers to alter their travel plans to Hawai‘i Island or any of the Hawaiian Islands at this time,” the state tourism agency said in its Oct. “Mauna Loa volcano is not erupting at this time and recent news of the U.S. Trails into the Hawaiʻi Volcanoes National Park to the Mauna Loa summit originate at the end of the road.The hype has even been enough for the Hawai‘i Tourism Authority to put out a message reassuring travelers and reminding them that Hawai‘i is a dynamic and ever-changing place. The Observatory facilities are not open to the public. Under optimum conditions, the islands of Kahoʻolawe, Lānaʻi, and Molokaʻi can be seen. Clear weather provides a spectacular view of Mauna Kea, Kohala, Haleakalā (Maui), Hualālai, and the Pōhakuloa saddle. This observatory has been providing global carbon dioxide (and climate change) data since the 1950s. This paved, winding, rolling, single lane, two wheel drive road proceeds roughly south for about 3 miles, then southeast for 5 miles, then west over nearly barren lava flows, rising steadily to the NOAA Earth System Research Laboratory at the 11,150' elevation on the north slope of Mauna Loa. Herbicide may be used to remove weeds prior to striping. This paved road is one-lane with numerous blind turns and is at a high elevation. Staff, volunteers, and Boy Scouts will be striping the road. ![]() Motorists should drive with extra caution along the Mauna Loa Observatory Road.
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