Flói is the name of the area defined by Ölfusá, Hvítá, Merkurhraun, Þjórsá and the coast. Vegetation is diverse and birdlife thrives. In the easternmost part is the community Flóahreppur which is inhabited by about 550 people living off agriculture.
Earthquakes have caused havoc in past centuries. On the top of the area you’ll see evidence of massive earthquakes, which occurred on June 21st, 2000. There was great damage to property in the quake, which measured 6.5 on the Richter scale.

Þjórsá is the longest river in the country at 230 km and the most voluminous, similar to Ölfusá at 360 m/s. The water comes from under Hofsjökull and Vatnajökull. The amount of clay carried along with it is enormous: 4.5 million tonnes per year.

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