4.2 Earthquake SE of Volcano, Hawaiʻi: Adjusting South Flank
The US Geological Survey’s Hawaiian Volcano Observatory recorded a magnitude-4.2 earthquake on Saturday, April 27, 2019, at 5:26 p.m. HST.
The earthquake was located about 20 km (12 mi) southeast of Volcano on the Island of Hawaiʻi at a depth of 6 km (~4 mi). This earthquake is part of the continuing adjustments beneath the south flank of Kīlauea following the magnitude-6.9 earthquake that occurred on May 4, 2018.
Twenty seconds before the magnitude-4.2 earthquake, a magnitude-1.6 quake occurred deep beneath Kīlauea Volcano’s Southwest Rift Zone, causing some initial confusion about the larger earthquake’s location.
A map showing the location of both earthquakes is posted on HVO’s website at https://volcanoes.usgs.gov/
Weak to light shaking, with a maximum Intensity of IV on the Mercalli Intensity Scale, has been reported primarily in East Hawaiʻi, with a few reports from West Hawaiʻi. The USGS “Did you feel it?” service (http://earthquake.usgs.gov/
The earthquakes have caused no detectable changes in activity at either Kīlauea or Mauna Loa volcanoes.
According to the Pacific Tsunami Warning Center (PTWC) no tsunami was generated by the earthquake.