Iceland volcano eruption chance remains ‘significant’ amid continuous earthquake activity

Thousands of earthquakes have been reported since the fears of a volcanic eruption began last week. Most of those have been reported along a 9-mile magma tunnel, or dike, just below the Earth’s surface.

GRINDAVIK, Iceland – Evacuated residents of the seaside town of Grindavík in Iceland were allowed to return home on Monday to quickly gather belongings as hundreds of earthquakes continue to shake the region amid a "significant likeliness" that a volcano there could erupt within days.

The Icelandic Meteorological Office (IMO) said on Monday that about 900 earthquakes have been reported in the region since midnight, although the frequency and intensity have been decreasing.

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Thousands of earthquakes have occurred along an approximately 9-mile-long magma tunnel, or dike, just below the Earth’s surface.

The most recent earthquake activity in the area has been found along the southern portions of the magma corridor between Sundhnúk and Grindavík at a depth of about 1.25 miles to 3.1 miles.

In addition, the IMO reported that a graben-like formation of about 3 feet now slices through parts of Grindavík due to the magma intrusion.

The USGS defines a graben as a piece of the Earth’s crust that has shifted downward in comparison to adjacent crust known as horsts which are shifted upward.

The IMO added that after analyzing data it appears that the greatest area of magma upwelling is sourced closer to Sundhnúk, a little more than 2 miles to the north-northeast of Grindavík.

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No more residents allowed back inside Grindavik

Police allowed some residents to return to an eastern district of Grindavík on Sunday to gather what they could before being escorted back to safety.

More areas of the town were open to residents earlier on Monday before the decision was made to let all residents back inside the town to gather essential belongings, pets and vehicles that may have been left behind during the initial evacuation, according to national public service broadcaster RÚV.

Emergency officials said Grindavík was closed to residents at 4 p.m. local time (11 a.m. EST), and there would only be 30 minutes for those residents who returned to get out of the area.

Traffic into the town was an issue on Monday, and that forced local officials to urge patience while residents waited their turn to enter.

It was also recommended to not return home if there wasn’t a need, and if a return home was necessary, only one person per household would be allowed to return.

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Large cracks form in roads

With earthquakes continuously rattling the region, large cracks have formed across major roads that have forced officials to close them to traffic.

The Icelandic Road and Coastal Administration shared several photos on Facebook of the destruction caused to roadways as a result of the earthquakes.

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They show large cracks and holes surrounded by traffic cones, and crews inspecting the area to determine the extent of the damage.

Video from the area shows portions of a road outside of Grindavík that were swallowed by the earth. The person behind the camera then bravely gets a closer look to show a better look at the damage and zooms in to see how deep the hole beneath the road actually is.

Iceland has the highest number of active volcanic systems in Europe, with more than 30 currently active.

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