The Hawaiian Volcano Observatory (HVO) reported a moderate (on the Modified Mercalli Intensity Scale) tectonic earthquake with magnitude M 4.5 at 23 km depth beneath the northwestern flank of the volcano at 07:30 local time this morning.
Scientist David Phillips says: „This earthquake was widely felt across the Island of Hawai‘i and throughout the state. Please be aware that aftershocks are possible and may be felt. This earthquake is not related to volcanic activity and HVO data streams show no impact on Mauna Loa or Kīlauea at this time. The eruption of Kīlauea continues, with all recent activity confined to the summit within Halema’uma’u crater and with no indications of activity migrating elsewhere. HVO continues to monitor Hawaiian volcanoes for any changes.”
The depth and location of the earthquake are likely related to tectonic processes.
Source: Hawaiian Volcano Observatory volcano activity update 20 March 2022