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DANGEROUS VOLCANOES IN THE WORLD A RE-ERUPTION OF 11 OF THE 1,500 ACTIVE VOLCANOES IS LIKELY TO BE...
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Transcript of DANGEROUS VOLCANOES IN THE WORLD A RE-ERUPTION OF 11 OF THE 1,500 ACTIVE VOLCANOES IS LIKELY TO BE...
DANGEROUS VOLCANOES IN THE WORLD
A RE-ERUPTION OF 11 OF THE 1,500 ACTIVE VOLCANOES IS LIKELY TO BE VERY
DEVASTATING, LOCALLY, REGIONALLY, AND GLOBALLY
Dr. Walter Hays,
Global Alliance For Disaster Reduction
11 VOLCANOES THE WORLD HOPES WILL NOT ERUPT AGAIN
• Eyjafjallajökull and Katla (ICELAND)
• Chaiten
• Krakatau
• Merapi
• Vesuvius
• Pinatubo
• Mount Rainier
• Nevada del Ruiz
• Popocatepl
• Nyirangongo (CONGO)
WHAT MAKES A VOLCANO ESPECIALLY DANGEROUS
• Location and a large explosivity index (VEI) combine to make some volcanoes especially dangerous.
LOCATION NEAR CITIES MAKES SOME VOLCANOES VERY DANGEROUS
An eruption at some locations is certain to be devastating to people, their property, their health, the community infra-structure, the environment, and the economy.
The 800-meter fissure caused by the first eruption, which grew to 1.2 km in the second eruption, could be heading towards the Myrdalsjokall
glacier, which sits atop the powerful Katla volcano
An eruption of the Katla volcano, located under the
massive Myrdalsjokull icecap, could cause disastrous local
flooding, explosive blasts, and eruption clouds that would disrupt air traffic between
Europe and the USA.
CHAITEN ERUPTED AFTER 8,000-10,000 YEAR DORMANCY
•THE 1,200 M (3,550 FT) VOLCANO SENT ASH HIGH INTO THE SKY.• “VOLCANIC EARTHQUAKES WERE TRIGGERED IN THE AREA. •1,500 RESIDENTS EVACUATED, MOSTLY BY BOAT
Krakatau • 26-27 August, 1883 • The big one!
http://www.geology.sdsu.edu/how_volcanoes_work/Krakatau.htmlhttp://www.geology.sdsu.edu/how_volcanoes_work/Krakatau.html
The 1883 Krakatoa Eruption !
Anak Krakatoa—Son of Krakatoa
INDONESIA’S MOUNT MERAPI ERUPTED IN MAY & JUNE, 2006
• Mount Merapi emitted lava, debris, and a pyroclastic flow on May 15, but this one was not devastating.
Mount Somma-Vesuvius• Location: Bay
Naples, east of the city of Naples, Italy
• Last eruption: March, 1944
Pinatubo was the second largest eruption of the 20th century and the
largest to impact a densely populated area.
The lahar generated by the eruption of Nevada del Ruiz buried 25,000
people in the city of Armero as they slept.