Iceland is known for having numerous volcanoes in its country. With 130 volcanoes that include both active and inactive ones, the place is always closely monitored by geophysicists. Now, reports say that four of Iceland's biggest volcanoes are showing signs of a near eruption.

The 2010 eruption of the Eyjafjallajökull volcano did not only cause physical damage to the nearby locations but it did cause some damage to the economy as well. According to the Daily Mail, a huge number of flights were canceled which affected more than 10 million air passengers that amounted to losses of $4.9 billion in the European economy.

With four volcanoes about to erupt namely, Katla, Hekla, Bárðarbunga and Grímsvötn, there's going to be a lot at stake. Experts even state that it will definitely cause chaos in world travel which could affect the world economy.

IFLScience! reported that any of these volcanoes might erupt within the next few years. As of now, the four volcanoes are having some pre-eruptive activities with its minor lava flows.

Bárðarbunga, one of the most recentl-active volcanoes, showed some signs of activity that happened back in 2014-2015 where lava flows came out of the volcano. Katla has been exhibiting tremors as well that goes along with some minor lava flows.

Grímsvötn, which is just a nearby volcano to Bárðarbunga, last erupted in 2011. There are also some consistent seismic activities happening because its magma source is the same with Bárðarbunga.

The last eruption of Hekla was back in 2010 and its previous records show that it has a recurrence of 10 years. Now, the volcano is seven years late and some are predicting that it will be one of the most catastrophic events if erupts after a few years more.

These four volcanoes are being closely monitored by researchers and scientists. However, it's still quite hard to predict which of the four will erupt first. It's also hard to forecast the duration of the eruptions.