Hualālai last erupted in 1801 and, more recently, had a damaging seismic swarm in 1929 that was probably the result of a superficial magma intrusion. During this period, no microearthquake swarms or harmonic tremors (both indicative of magma migration) have been recorded, although each year the hualalai experiences several magnitude 4 earthquakes. To be considered active, a volcano will have erupted at least once in the past 10,000 years, and there is still enough seismic activity below the surface to suggest that another eruption may occur in the next 1000 years or less.
Due to this and the fact that more than 200 years have passed since its last eruption, Hualalai volcano is considered a potentially dangerous volcano on the island of Hawaii that is delayed for an eruption. For additional information on Hualalai Volcano. No magma-related seismicity or soil deformation has been detected recently in Hualalai, making it difficult to say if and when the next eruption could occur. In 1929, intense seismic activity below the surface, which lasted several weeks, was probably caused by increased magma.
For residents of the Kona area, keep in mind that Hualalai hasn't erupted since 1801; Mauna Loa is considered active but hasn't erupted since 1984.The most recent documented activity was a seismic swarm in 1929, which probably corresponded to a magma intrusion into the volcano. Alkaline eruptions in Hualalai have generally been much less explosive than those at neighboring Kohala and Mauna Kea volcanoes. Of course, things can change at any time with an active volcano in Hawaii, depending on the whims of Pelé, the goddess of fire and Hawaiian volcanoes. Lava flows represent by far the greatest danger in a possible future Hualalai eruption, because although explosive pyroclastic eruptions have occurred during the Holocene epoch (the last 10,000 years), they are relatively rare and cover only limited parts of the volcano.
