A long dormant volcano erupted near Iceland’s capital Reykjavik on Friday, shooting lava high into the night sky after thousands of small earthquakes in recent weeks. This was the area’s first volcanic eruption in nearly 800 years.

The eruption occurred near Fagradalsfjall, a mountain on the Reykjanes Peninsula, around 30 km (19 miles) southwest of the capital.

Some four hours after the initial eruption at 2045 GMT – the first on the peninsula since the 12th century – lava covered about one square kilometer or nearly 200 football fields.

Initial aerial footage, posted on the Facebook page of the Icelandic Meteorological Office, showed a relatively small eruption so far, with two streams of lava running in opposite directions.

The glow from the lava could be seen from the outskirts of Iceland’s capital, Reykjavík, which is about 32 kilometers (20 miles) away.

“I can see the glowing red sky from my window,” said Rannveig Gudmundsdottir, resident in the town of Grindavik, only 8 km (5 miles) from the eruption.

“Everyone here is getting into their cars to drive up there,” she said.

More than 40,000 earthquakes have occurred on the peninsula in the past four weeks, a huge jump from the 1,000-3,000 earthquakes registered each year since 2014.

The eruption posed no immediate danger to people in Grindavik or to critical infrastructure, according to the Icelandic Meteorological Office (IMO), which classified the eruption as small.

A fissure 500 to 750 meters (547 to 820 yards) long opened at the eruption site, spewing lava fountains up to 100 meters (110 yards) high, Bjarki Friis of the meteorological office said.

Residents in the town of Thorlakshofn, east of the eruption site, were told to stay indoors to avoid exposure to volcanic gases, Iceland’s Department of Civil Protection and Emergency Management said. The wind was blowing from the west.

The Department of Emergency Management said it was not anticipating evacuations because the volcano is in a remote valley, about 2.5 kilometres (1.5 miles) from the nearest road.

Unlike the eruption in 2010 of the Eyjafjallajökull volcano, which halted approximately 900,000 flights and forced hundreds of Icelanders from their homes, this eruption is not expected to spew much ash or smoke into the atmosphere.

Located between the Eurasian and the North American tectonic plates, among the largest on the planet, Iceland is a seismic and volcanic hot spot as the two plates move in opposite directions.

The source of the eruption is a large body of molten rock, known as magma, which has pushed its way to the surface over the past weeks, instigating the earthquakes.

The number of quakes had slowed down in recent days, however, leading geologists to say that an eruption would be less likely.

Reykjavik’s international Keflavik airport was not closed following the eruption, but each airline had to decide if it wanted to fly or not, IMO said.

Arrivals and departures on the airport’s website showed no disruptions.

The Fagradals Mountain volcano had been dormant for 6,000 years, and the Reykjanes Peninsula hadn’t seen an eruption of any volcano in 781 years.

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