Alexandra Gore –The Eruption of Tambora in 1815

(And Its Effects On The Global Climate)

 

Introduction

The Eruption

The Effects

"The year without summer"

The Contradiction of Mount Pinatubo

Conclusion

Sources

     The place was Sumbawa, Indonesia, the year was 1815, and the month was April.  Everything was set for one of the most explosive events in human history.  Sumbawa Island is home to the volcano called Tambora which has an elevation of 9,348 ft. (2,850m) and a diameter at sea-level of 38 mile.  On April 5th of 1815 the volcano, which had lain dormant for more than 5,000 years, began to erupt.

http://www.ilexikon.com/Vulkan.html

 

The mountain had been experiencing small eruptions before it exploded in 1815 and the April eruption left a deep summit caldera where the previous stratovolcano stood, causing earthquakes as far away as Surabaya (a distance of 500 km) in reaction to the collapse.  Ash exploded from the eruption and was carried as far as east Java, approximately 900 km from Tambora.  Thunder-like sounds were heard up to 1,400 km away and the entire eruption is estimated to have had the volcanic explosion strength of seven.  The eruption column itself was roughly 44 km high vertically and produced numerous pyroclastic flows.  Tsunamis were generated as a result of both the flows and the shock waves from the collapsing caldera.  In total, the volcanic eruption lasted for two days and ejected about 50 cubic km of magma. The eruption was the largest that had occurred over past 1,000 years, with an immediate human impact of 92,000 deaths.

  

http://gladstone.uoregon.edu/~bhart1/Volcanicbrian_files/

 

As far-reaching as the immediate outputs of the volcanic explosion were, the full effects of the eruption had yet to be felt.  The year after the eruption, 1816, is often titled “the year without summer," due to significantly cooler temperatures throughout Europe and other reaches of the world, resulting in such unusual phenomena as snow in June in the northern hemisphere and cyclone tracks being pushed to the south, bringing unusually wet weather in many areas.  Crop failures and famine abounded the world over, marked by higher death rates that exceeded anything on Earth in the past 10,000 years.  “The year without summer” is not a complete mystery, however, for its causes are the typical results of a large volcanic explosion, such as the Tambora eruption.  There are many who would disagree with this hypothesis, claiming that the effects of a volcanic eruption the size of Tambora could not be as far-reaching or as destructive to cause “the year without summer.”

 

 

For comments or questions please contact Alexandra Gore

 

[2] Newhall and Daniel Dzurisin, Historical unrest at large calderas of the world

[3] Newhall and Daniel Dzurisin, Historical unrest at large calderas of the world

[6] BBC Timewatch documentary: “Year without summer.”

[7] BBC Timewatch documentary: “Year without summer.”