The initial magnitude of the 9:02 p.m. earthquake was estimated at 4.1 by HVO’s automated software system, but then increased to magnitude 4.3. After close review by HVO seismic analysts this morning, the earthquake’s magnitude has been calculated to be 4.1.
The U.S. Geological Survey’s Hawaiian Volcano Observatory (HVO) has recorded more than 100 earthquakes in a swarm that began around 1:17 a.m. Wednesday. The earthquakes are located about 3 miles north-northwest of Kilauea volcano’s summit, near Namakanipaio in Hawaii Volcanoes National Park, at depths of 1 to 3 miles.
The largest earthquakes of the ongoing swarm have been a magnitude 4.1 quake at 9:02 p.m. Thursday and a magnitude 4.3 quake at 3:52 a.m. Friday. These earthquakes were widely felt on Hawaii Island.
As of 9 a.m. Friday, the USGS “Did you feel it?” website (earthquake.usgs.gov/eqcenter/dyfi/) had received 74 felt reports for the 9:02 p.m. earthquake and more than 60 felt reports for the 3:52 a.m. event.
The initial magnitude of the 9:02 p.m. earthquake was estimated at 4.1 by HVO’s automated software system, but then increased to magnitude 4.3. After close review by HVO seismic analysts this morning, the earthquake’s magnitude has been calculated to be 4.1.