The Pāhala swarm of earthquakes in Hawai‘i

A magma network may feed into different volcanoes, including Mauna Loa and Kīlauea On 27 November 2022, a short-lived hour of increased seismicity heralded the awakening of Mauna Loa Volcano in Hawai‘i after 38 years without eruption. The eruption began in the summit caldera before quickly transitioning into the Northeast Rift Zone, feeding lava flows for about 2 weeks before flows stalled less than 3 km from the island’s main east-west highway. A primary goal of volcano monitoring is to provide early and accurate warnings of impending eruptions. But even for volcanoes as robustly monitored as Mauna Loa and its neighbor, Kīlauea, both short-term (hours to days) and long-term (months to years) forecasting is challenging. On page 462 of this issue, Wilding et al. ( 1 ) present a catalog of relocated earthquake hypocenters (points of origin) for Hawai‘i, providing unprecedented detail on the possible pathways for magma (molten rock beneath Earth’s surface) from the mantle to Kīlauea and Mauna Loa.