On Tuesday, geologists announced they had detected a "swarm of earthquakes" at Kilauea volcano in Hawaii but it is not erupting, the Associated Press (AP) reports.
According to the Hawaiian Volcano Observatory seismic activity began overnight, continuing into the morning, with more than 140 quakes recorded as of 4:30 a.m. Most were small, measuring a magnitude 1, with the largest a 3.3 magnitude.
Scientists recorded changes to the ground surface of the volcano, which may suggest magma was moving beneath southern portions of its caldera - although there nothing indicating magma has made it to the surface.
Kilauea is a one of the most active of the five volcanoes that form Hawaii.
It is between 210,000 and 280,000 years old, and its latest bout of activity occurred between 1983 and 2018, a decades-long period of constant emissions. The event ended in May 2018 with a large eruption that lasted for nearly three months and destroyed nearly 700 homes.
*Thumbnail image courtesy: G.E. Ulrich/[USGS] - Public Domain. (https://en.wikipedia.org/wiki/K%C4%ABlauea#/media/File:Puu_Oo_cropped.jpg). File photo taken in 1983 of Pu'u 'O'o, a Volcanic cone on Kilauea, Hawaii.