Mauna Loa shows warning signs before 2022 eruption, study finds

A new study confirms that Mauna Loa, the world's largest active volcano, showed warning signs before its eruption in November 2022. Researchers detected small earthquakes and ground swelling, indicating magma movement beneath the surface. The study found that about 70 days before the eruption, molten rock rose from depths of 1.9 to 3 miles to less than 1 mile below the summit. This aligns with the observations made by geologists at the time. While scientists cannot predict eruptions, they can forecast potential activity based on past behavior. Improved data may help refine these forecasts for future volcanic events.