The seismic network of the Hawaiian Volcano Observatory (HVO) recorded a volcano-tectonic earthquake with magnitude M 4.2 at 7,5 km depth beneath the southern flank of the volcano yesterday at 11:41 local time. The earthquake was centered about 15 km (9 miles) south of Volcano, under the Hilina Pali area of Hawai‘i Volcanoes National Park.
Weak to light shaking, with maximum Intensity of IV on the Modified Mercalli Intensity Scale, has been reported across the Island of Hawai‘i.
According to HVO Scientist-in-Charge Ken Hon, the earthquake had no apparent effect on Kīlauea or Mauna Loa volcanoes. “We see no detectable changes in activity at the summits or along the rift zones of Kīlauea or Mauna Loa as a result of this earthquake. Aftershocks are possible and could be felt.”
Source: Hawaiian Volcano Observatory volcano activity update 24 May 2021