Mauna Loa volcano erupted on November 27, 2022, after 38 years of quiescence, marking the first eruption of the world’s largest active volcano since 1984. Precursory activity was characterized by escalating seismicity and ground deformation, with increased unrest beginning in mid-September 2022. At 22:24 HST, tilt and seismic alarms alerted Hawaiian Volcano Observatory staff to escalating activity, signaling an imminent erupti...