Natural disasters such as volcanic eruptions and sudden floods from beneath the glacier have, through the centuries, shaped the nature and society of the region. In 1783, a huge lava flow streamed from Lakagígar in what became known as the "Skaftá Fires". This is belived to have been one of the greatest lava flows in a single eruption in the history of the world: the molten lava filled the gorges through which the Skaftá and Hverfisfljót rivers flowed, and swept down in two branches into inhabited areas, to spread over the lowlands where it laid waste to many farms. The eruption produced large quantities of volcanic ash. For residents of the region, and Iceland as a whole, the results of the eruption were catastrophic: this time is known as "Móðuharðindin" (the Haze Famine). Eruptions have also taken place in historic times in Eldgjá, Katla in Mýrdalsjökull glacier and under Öræfajökull glacier, as well as at smaller volcanic sites.