The Kilauea volcano in Hawaii has begun erupting less than one month after it and its larger neighbour Mauna Loa stopped releasing lava from a previous eruption.

The Hawaiian Volcano Observatory said it detected a glow in webcam images, indicating Kilauea had begun erupting on Thursday inside Halemaumau crater at the volcano’s summit caldera.

Volcano on Hawaii’s Big Island erupting just weeks after it stopped releasing lava from a previous eruption.

Earlier on Thursday, the United States Geological Survey raised the alert level for Kilauea due to signs that magma was moving below the summit’s surface, an indication that the volcano might erupt.

The agency said the eruption produced volcanic smog, known as vog, which has been observed downwind from Kilauea.

Kilauea is one of the world’s most active volcanoes. For about two weeks starting on November 27, Hawaii had two volcanoes spewing lava side by side

when Mauna Loa, the world’s largest volcano, erupted for the first time in 38 years. Both volcanoes stopped erupting at about the same time.