UPDATE: The USGS Hawaiian Volcano Observatory revised the magnitude of the quake back to 4.1., and issued a media release which we have posted below.
HAWAII ISLAND – A magnitude 4.1 earthquake rattled parts of Hawaii Island on Friday morning.
The United States Geological Survey reports the temblor was centered in the volcanic Puna district on the south flank of Kilauea, 12 miles southwest of Leilani Estates and just to the west of Kalapana. It occurred at 9:23 a.m. HST and was measured at a depth of 5.1 miles.
The earthquake did not generate a tsunami, reported the Pacific Tsunami Warning Center.
The USGS Hawaiian Volcano Observatory shared this information:
The U.S. Geological Survey’s Hawaiian Volcano Observatory (HVO) recorded a magnitude-4.1 earthquake located beneath Kīlauea Volcano’s south flank on Friday, February 12, 2016, at 9:23 a.m., HST. According to the Pacific Tsunami Warning Center, there is no tsunami threat from this earthquake.
The earthquake, which was widely felt on the Island of Hawaiʻi, was located about 7.7 km (4.8 mi) west of Kalapana and 7.5 km (4.7 mi) southeast of the Puʻu ʻŌʻō crater, at a depth of 8.3 km (5.1 mi). A map showing the location of the earthquake is posted on HVO’s website.
The USGS “Did you feel it?” website received 156 felt reports within the first hour of the earthquake. The maximum intensity of shaking reported by Island of Hawaiʻi residents was IV on the Mercalli Intensity Scale, indicating light shaking.
There have been no aftershocks following this morning’s magnitude-4.1 earthquake.
Kīlauea’s south flank has been the site of 28 earthquakes of magnitude-4.0 or greater during the past 25 years. Most are caused by abrupt motion of the volcano’s south flank, which moves to the southeast over the oceanic crust as a result of magma being injected into the East Rift Zone. The location, depth, and waveforms recorded as part of today’s earthquake are all consistent with slip along this south flank fault.
According to HVO Scientist-in-Charge Christina Neal the earthquake had no apparent effect on Kīlauea Volcano’s ongoing eruptions. “HVO monitoring networks have not detected any significant changes in activity at the summit or along the rift zones of Kīlauea or at other Hawaiian volcanoes resulting from the earthquake.” HVO geologists working near the Puʻu ʻŌʻō cone this morning reported feeling the earthquake, but noted no change in the eruption.
For more information on recent earthquakes in Hawaiʻi and eruption updates, visit the Hawaiian Volcano Observatory website at hvo.wr.usgs.gov.