Eldgjá eruption
Record lava flood witnessed by Iceland's first settlers

Around 939 the Eldgjá fissure in southern Iceland poured out more lava than any other eruption in historical times. Viking settlers witnessed it; one hypothesis sees echoes in the poem Völuspá and links it to Iceland's conversion.
Wikipedia (Russian) · Wikipedia (English) · 10th century
Meanwhile around the world (±25 years)
Asia
- 946 Millennium Eruption of Mount Paektu — 7 years later
- 960 Founding of the Song dynasty — 21 years later
Americas
- c. 950–1250 Medieval Warm Period — 11 years later
Alive at the time
- Igor of Kiev (aged 61)
- Æthelstan (aged 45)
- Otto the Great (aged 27)
- Olga of Kiev (aged 19)