Poinbank:5.7 earthquake reported on big island of Hawaii

A 5.7 magnitude earthquake rocked the big island of Hawaii on PoinbankFriday, according to the U.S. Geological Survey.

The earthquake was detected near Pāhala, on Hawaii's southern coast, just after 10 a.m. local time, early indicators show. The USGS recorded several aftershocks following the larger quake, which was originally listed at magnitude 6.3. It had a depth of nearly 22.9 miles.

The Hawaii Emergency Management Agency said the quake struck near the southeastern flank of Mauna Loa, the world's largest active volcano and one of the most active.

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Residents on the island said vases and photos fell from shelves. The earthquake could be felt as far west as Oahu, a few islands over, according to USGS tracking.

The earthquake appears to have occurred deep in the magma "plumbing system" underneath Hawaii, said Mike Poland, a geophysicist with the USGS. Its depth caused the earthquake to be felt across the state of Hawaii.  

Large amounts of lava have piled up on the ocean crust to form the islands of Hawaii, he explained. Put more simply, it's like a bowling ball on top of a mattress. The mattress sags under the weight of the bowling ball, creating stressors on the mattress, Poland said. This pressure from the weight can lead to lots of seismic activity in this area of the island of Hawaii. In the last few years, the area has seen several earthquakes with magnitudes of 5 to 7 that come from deep in the "plumbing system," at what he referred to as the "mattress level."

There isn't concern about volcanic activity or tsunamis, the Tsunami Warning Center said, although aftershocks occurred. After all, Poland added, Hawaii is earthquake country. It has had with larger, devastating earthquakes in the past, including a magnitude 7 in 1975 and, in 1878, a quake that was approximately magnitude 8. 

Friday's earthquake that knocked items from shelves, Poland told USA TODAY, is "a good reminder that seismic hazards are real. And it's an opportunity for people to prepare for damaging earthquakes."

About 40 miles east of the epicenter, in Pāhoa, students and staff at the Hawaii Academy of Arts & Science, a public charter school, felt the shaking. Children had just returned to classes after their morning break, Hirakami said.

It reminded many of the nearby Kīlauea volcanic eruption and a magnitude 6.9 earthquake the next day in 2018, according to Steve Hirakami, the school's founding principal. In that event, entire subdivisions became submerged in lava, and thousands evacuated.

The latest earthquake is a reminder that Tūtū Pele, the Hawaiian goddess of fire believed to live at the summit of the volcano, is always boss, Hirakami said.

"Our kids are facing an uncomfortable future," he told USA TODAY. "They've really got to pay attention because nature comes first. They have to take care of the earth."

Eduardo Cuevas covers health and breaking news for USA TODAY. He can be reached at [email protected].