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Oshima, Japan Volcano

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Gabrielle Cronin

on 18 March 2014

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Transcript of Oshima, Japan Volcano

The 1741 eruption was the largest in historical time at Oshima, Japan
The Oshima Volcano
The Area Impacted
How Long Did the Eruption Last?
The landslide had 3 kinds of shear stress.

Bottom friction

Horizontal viscosity

Interactive force

Wednesday, August 23, 1741
Vol XCIII, No. 311
After the eruption
The large debris slide went down the hill and with massive force, hit the ocean and caused a tsunami.
The top of the volcano collapsed and formed a caldera.
The volcano remains dormant but there was seismic under rest in 1996.
The Oshima Volcano in Japan

2 minutes
At 5 A.M.
Composite volcano
Where and When did the volcano erupt?

“It started with a strange hue of gray in the skies. "Looks like rain," my friend commented as we started up the steps in the train that night. Commuting home after being isolated all day behind the computer, we were as yet unaware of the ash spewing out of the Oshima, Volcano in Japan. I saw the ash and lava starting to come out, I grabbed my friend and we ran as far as we could in the other direction. Then the lava caught up with debris and started flowing down to the ocean. Luckily, we were already in a different direction on a speedboat fast enough just to see the beginning of the tsunami. Thank you! “
A Witness Account
This volcano erupted on August 23, 1741, in Oshima, Japan
It is surrounded by the Sagami-nada Sea
Oshima has Shimoda across the sea to the left and Nojimazaki to its right.
Hear it here! A volcano causing landslide and a tsunami.
1. "Oshima-Oshima Volcano, Hokkaido (Japan) - Facts & Information
VolcanoDiscovery:.' Oshima-Oshima Volcano, Hokkaido (Japan) - Facts & Information / VolcanoDiscovery:. N.p., n.d. Web. 14 Mar. 2014.

2. "The Oshima-Oshima Volcanic Eruption." FindTheBest. N.p., n.d. Web. 14 Mar.

3. "Model of Tsunami Generation by Collapse of Volcanic Eruption: The 1741 Oshima-
Oshima Tsunami - Springer." Model of Tsunami Generation by Collapse of Volcanic Eruption: The 1741 Oshima-Oshima Tsunami - Springer. N.p., n.d. Web. 14 Mar. 2014.

4. "Volcanic Origin of the 1741 Oshima-Oshima Tsunami in the Japan Sea." Oshima
Volcano. N.p., n.d. Web. 14 Mar. 2014.
Work Cited
1741 Eruption
This eruption was devastating. Once the volcano erupted, it caused a major landslide of debris that triggered a tsunami. The casualties were from 1,500 to 2,000 deaths. The coasts of Hokkaido, western Honshu, and as far as Korea were damaged severely after the tsunami came.

1.Describe the human impact in terms of deaths, damage done to the land, building and infrastructure.

The impact could have been lessened if the people to the cloud of ash as a sign to move because the volcano is about to blow. Also people could already have an emergency bag if something went wrong, like a volcanic eruption. Even with cross braces and sheer walls it will not stop the lava from disintegrating or destroying any building or house that's in its way.

Describe how the impact of the volcanic eruption could have been lessened by preparedness. What could have been done before the eruption to reduce death toll and damage done.
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