Lakagígar — Greatest Natural Disaster in Recorded History
The 1783–84 eruption killed 25% of Iceland's population and approximately 6 million people globally through climate disruption
Lakagígar is a 25 km-long fissure in the Grímsvötn volcanic system. Beginning on 8 June 1783, the eruption lasted eight months and produced the largest basaltic lava flow in historical time. The eruption's global impacts caused climate disruption across the Northern Hemisphere and led to the deaths of millions worldwide.
Volcanic System
The eruption is known in Iceland as Skaftáreldar (Skaftá River Fires). Beginning on June 8, 1783, the 25 km fissure opened with 130 craters forming along its length. The eruption lasted 8 months (8 Jun 1783 – 7 Feb 1784) and produced the largest basaltic lava flow in historical time.
- 25 km-long fissure in Grímsvötn system
- 130 craters formed during eruption
- Part of Grímsvötn volcanic system
- Located in southern Iceland highlands
- Duration: 8 months (8 Jun 1783 – 7 Feb 1784)
- Largest basaltic lava flow in historical time
Iceland's Catastrophe
Known in Iceland as Móðuharðindin (the Haze Famine), the eruption caused immediate and catastrophic losses. The fluorine-rich gases poisoned pastures and livestock, causing catastrophic animal deaths. Crop failures followed, leading to widespread famine.
Pastor Jón Steingrímsson documented the event. His 'Fire Sermon' is said to have saved the town of Kirkjubæjarklaustur when a lava flow reportedly stopped after his prayer. This legendary event is commemorated annually in Iceland.
- 25% of Iceland's population died (~10,000 people)
- 80% of sheep perished due to fluorine poisoning
- 50% of cattle died
- Pastures destroyed, rivers filled with lava
- Known as 'The Haze Famine' (Móðuharðindin)
Global Climate Impact
The eruption's sulphuric haze blanketed Europe and North America, causing global climate cooling of 1–3°C. Crop failures followed across Europe and parts of Asia, contributing to famines that killed millions worldwide. Benjamin Franklin was the first to link volcanic eruptions to climate disruption, writing in 1784 about the mysterious dry fog over Europe and North America.
- Iceland: ~10,000 dead (25% of population)
- Iceland livestock: 80% of sheep, 50% of cattle died
- Europe: Crop failures in France, Britain, Norway; harsh winter of 1783–84
- Asia & Africa: Monsoon disruption, Nile flood failure, crop failures in Japan
- Global: Estimated 6 million deaths through famine and climate effects
- Global temperature drop of 1–3°C lasting until 1785
- Contributing factor to conditions that preceded the French Revolution
Visiting Lakagígar Today
Lakagígar is located in Iceland's remote highlands, accessible only by 4WD vehicles via F-206 during summer months. The drive from Kirkjubæjarklaustur takes 2–3 hours each way on rough F-roads. Allow 2–3 hours for hiking the crater trail. Guided tours typically last 10–12 hours including transportation.
Today the moss-covered craters stand as a haunting memorial to the catastrophic power that once poured from this landscape. An information center is at the site entrance.
- Access: F206 from Ring Road — 4WD vehicle absolutely essential
- River crossings required
- Season: June–September (closed October–May)
- July–August: Best weather; September: Autumn colors
- 130 volcanic craters to explore along fissure
- Massive lava fields including Eldhraun
- Guided tours available from Kirkjubæjarklaustur
Safety Information
Lakagígar is in a remote highland area accessible only by 4WD vehicle. 4WD with high clearance, spare tires, GPS, emergency food and water, and full fuel are essential. Check road conditions at road.is and register your trip at safetravel.is.