In photo: Mauna Loa erupts

Mauna Loa volcano erupts on November 28, 2022 on the island of Hawaii.

Mauna Loa, the world’s largest active volcano, erupted for the first time since 1984.

Lava flows down the side of the volcano at a temperature of 1,000C, but experts say this doesn’t pose much of a threat to local residents yet.

The world's largest active volcano, Mauna Loa, continues to erupt from its northeastern rift, on the island of Hawaii, Hawaii, USA, November 30, 2022.

The world’s largest active volcano, Mauna Loa, continues to erupt from its northeastern rift, on the island of Hawaii, Hawaii, USA, November 30, 2022.

The world's largest active volcano, Mauna Loa, continues to erupt from its northeastern rift, on the island of Hawaii, Hawaii, USA, November 30, 2022.

The world’s largest active volcano, Mauna Loa, continues to erupt from its northeastern rift, on the island of Hawaii, Hawaii, USA, November 30, 2022.

The world's largest active volcano, Mauna Loa, continues to erupt from its northeastern rift, on the island of Hawaii, Hawaii, USA, November 30, 2022.

The world’s largest active volcano, Mauna Loa, continues to erupt from its northeastern rift, on the island of Hawaii, Hawaii, USA, November 30, 2022.

Mauna Loa, which means “long mountain” in Hawaiian, is the largest active volcano in the world.

It covers 2,035 square miles (5,271 square km) and is one of a chain of five volcanoes that form the Big Island of Hawaii.

This volcano alone comprises half of the entire island.

Mauna Loa’s summit is 4,170m above sea level, but its base is on the seabed. From there to the top it is 30,085 feet (9,170m), making it taller than Mount Everest.

Aerial view of Mauna Loa summit with Lua Hou in foreground followed by Lua Hohonu, South Pit and Mokuʻāweoweo summit caldera following the eruption of Mauna Loa Volcano in Hawaii, USA, November 28, 2022.

Aerial view of Mauna Loa summit with Lua Hou in foreground followed by Lua Hohonu, South Pit and Mokuʻāweoweo summit caldera following the eruption of Mauna Loa Volcano in Hawaii, USA, November 28, 2022.

A satellite image shows the fissures of the Mauna Loa volcano in Hawaii, USA.  July 15, 2022.

A satellite image shows the fissures of the Mauna Loa volcano in Hawaii, USA. July 15, 2022.

Plumes of superheated material called magma have gushed beneath Mauna Loa and nearby volcanoes from a “hot spot” deep inside the Earth.

Volcanic eruption at Mauna Loa volcano on the Big Island of Hawaii on November 29, 2022.

Volcanic eruption at Mauna Loa volcano on the Big Island of Hawaii on November 29, 2022.

A view from Mauna Loa, the world's largest active volcano, began erupting overnight on November 30, 2022 on the Big Island of Hawaii, United States.

A view from Mauna Loa, the world’s largest active volcano, began erupting overnight on November 30, 2022 on the Big Island of Hawaii, United States.

Unlike many volcanoes, Mauna Loa doesn’t usually produce truly explosive eruptions, in which lava shoots into the air along with plumes of ash and gas.

Instead, the lava flows at a fairly slow pace down the side of the volcano.

Composite satellite images show rifts and lava flow from Hawaii's Mauna Loa volcano in Hawaii, USA.  July 15, 2022.

Composite satellite images show rifts and lava flow from Hawaii’s Mauna Loa volcano in Hawaii, USA. July 15, 2022.

The world's largest active volcano, Mauna Loa, continues to erupt from its northeastern rift, on the island of Hawaii, Hawaii, USA, November 30, 2022.

The world’s largest active volcano, Mauna Loa, continues to erupt from its northeastern rift, on the island of Hawaii, Hawaii, USA, November 30, 2022.

Local people may be at risk from gases emitted by Mauna Loa.

Hawaii’s health authorities say air quality is still good, but it could get worse at any time.

If so, local residents are advised to avoid outdoor activities and stay indoors with doors and windows closed.

Mauna Loa has erupted 33 times since 1843, the date of the first recorded eruption. On average, this is an eruption every five and a half years.

However, the last eruption was in 1984 as seen in the images below.

The eastern rift spatter cone of Kilauea, during a double eruption of Mauna Loa and Kilauea volcanoes on the island of Hawaii, March 30, 1984.

The eastern rift spatter cone of Kilauea, during a double eruption of Mauna Loa and Kilauea volcanoes on the island of Hawaii, March 30, 1984.

1984 Mauna Loa eruption

1984 Mauna Loa eruption

A fast flowing lava channel moves through a cooled section of a lava flow.  Hawaii.

A fast flowing lava channel moves through a cooled section of a lava flow. Hawaii.

The Mauna Loa volcano on the island of Hawaii is shown in this March 25, 1984 photo provided by the US Geological Survey

The Mauna Loa volcano on the island of Hawaii is shown in this March 25, 1984 photo provided by the US Geological Survey

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