It emerged from the ocean about 300,000 years ago and is one of the five volcanoes that make up the island. This also presents a clear danger to the surrounding communities; for example, in the event of an eruption similar to that of 1801, Kailua-Kona, which is 15 miles (24 km) from the summit of the volcano, could be completely covered in a matter of hours. Hawaiian volcanoes are known as shield volcanoes because of the characteristic shape they take when lava flows out. 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.
The other three volcanoes, Mauna Loa, Hualalai and Kilauea, are active, however, the latter is the only one that is actively erupting. To develop the classifications, the USGS uses a 24-factor hazard and exposure matrix, evaluating explosive activity over the past 500 and 5000 years, the frequency of eruptions, and the level of impact that an eruption could have on local populations, aircraft, transportation and energy infrastructure. Hualalai volcano covers an area of 7,170 acres on the western side of Oahu and is the oldest shield volcano on the island. Looking south from Kohala Volcano 40 miles (64 km) north of Kona, the outskirts of Waimea (Kamuela) are visible in the foreground.
This explains why older volcanoes remain dormant and eventually die out in a fairly straight line along the bottom of the Pacific Ocean. A volcano and earthquake monitor is responsible for monitoring both volcanoes and earthquakes in the state of Hawaii.
Lava flows from Hualalai and Kohala volcanoes (along with coral deposits) have buried most of Mahukona volcano. 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. Hualalai, which last sprouted in 1801, rises above the city of Kailua-Kona, but is relatively low compared to neighboring Mauna Loa and Mauna Kea. Approximately once every 1000 years, the Huallai volcano on the island of Hawaii produces a two- to three-stage eruption.