A light earthquake shook the south flank of Kilauea volcano on Hawaii island this morning, but there is no tsunami threat to the islands.

The magnitude 4.1 temblor struck 4.8 miles west of Kalapana and 4.7 miles southeast of Puu OO crater at a depth of 5.1 miles, according to an update from the U.S. Geological Survey.

The USGS “Did you feel it?” website received 156 reports within the first hour of the earthquake. Most felt light shaking.

Kilauea’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 crush as magma is injected into the East Rift Zone. The USGS said today’s earthquake is consistent with slip along the south flank fault.

There has been no significant change in the ongoing eruption of Kilauea following the earthquake.

The Pacific Tsunami Warning Center said the earthquake did not generate a tsunami.