BIG ISLAND, Hawaii – Mauna Loa, the world's largest active volcano located in Hawaii Volcanoes National Park, began erupting Sunday, sending ash thousands of feet into the air and illuminating the sky with the light of glowing lava on the ground below.
The eruption ended a 38-year stretch between activity.
The volcano has not prompted evacuations yet, but shelters have opened as a precaution, and residents are being told to review emergency plans.
According to forecasters with National Weather Service in Honolulu, ash from Mauna Loa reached up to 45,000 feet, prompting Ashfall Advisories for the Big Island until Monday evening. The NWS warned that winds may carry volcanic gas, ash and volcanic glass fibers known as Pele's Hair downwind.
A Hawaii realtor recorded the glow of Mauna Loa erupting against the backdrop of the water on Kailua Bay pier around 2 a.m. Monday calling it "eerily beautiful."
The glow of lava cast an angry red light across the sky that could be seen for miles around as residents began their workweek with the eruption underway.
Ken Hon, the U.S. Geological Survey Hawaiian Volcano Observatory scientist in charge, photographed the ongoing eruption Monday from Waikoloa, about an hour from the Mauna Loa Observatory.
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The USGS Hawaiian Volcano Observatory has a series of cameras located around the volcano, capturing different angles as the eruption is underway.
The images below were captured with a thermal camera from the northwest rim of Mokuʻāweoweo, the summit caldera of the Mauna Loa volcano. According to the USGS, the thermal camera temperatures show up to 932 degrees Fahrenheit, with bright yellow being the hottest temperature.
A different USGS camera from the north rim captures steam being emitted from the summit caldera.
The magmatic activity is also visible to weather satellites in space.
The National Oceanic Atmospheric Administration's GOES-West satellite captured heat signatures from Mauna Loa's summit caldera around the time the eruption began Sunday night.
Hawaii emergency officials continue to work with the USGS to monitor Mauna Loa and determine when or if evacuations may be needed.
Jon Jelsema, senior forecaster for the NWS in Honolulu, told FOX Weather the main concern is if the lava flow fills up the caldera on top of the volcano.
"This lava is quick-moving lava that can reach the coastline in two hours. So, you can imagine how dangerous a situation that is for the communities that are downslope," Jelsema said.
Mauna Loa has averaged eruptions every five years since 1843. This marked the longest eruption-free stretch, with the last one happening in 1984. Mauna Loa began showing increased seismic activity in September.