https://www.scientificamerican.com/article/hawaii-volcano-terms-explained-slide-show/

Long before outsiders arrived on the scene, Native Hawaiians understood their island chain’s volcanic origins. They also understood the island links were successively younger moving from northwest to southeast. In Hawaiian tradition the fire and volcano goddess Pele is thought to occupy the youngest and most active center of volcanism. Today that is Kilauea on the Big Island of Hawaii.

In the 21st century scientists are now able to put numbers to the island ages, ranging from around five million years at the oldest end up to the present day (at Kilauea). The young volcano is now experiencing one of many eruptions that over time have built it into a rather classic “shield volcano” composed of gentle lava flows, embroidered with two radial rift zones—one to the southwest and one to the east—where magma reaches the surface. Scientists have also identified an active seamount named Lihi growing at about 3,000 feet below sea level off the coast southwest of Kilauea.