[Folda] Today's Friday Seminar 12:30 - Prof. Bruce Houghton "Explaining diversity in the style of very recent pyroclastic eruptions at Kīlauea, Hawaii

[Deirdre Clark]

Today's seminar will be given by Prof. Bruce Houghton from the University
of Hawaii on “Explaining diversity in the style of very recent pyroclastic
eruptions at Kīlauea, Hawaii”

See abstract below.

---------- Forwarded message ----------
From: Maria H. Janebo <janebo at hi.is>
Date: Fri, Oct 21, 2016 at 9:04 AM
Subject: [Jhi] Friday seminar - TODAY 12:30 - Prof. Bruce Houghton
"Explaining diversity in the style of very recent pyroclastic eruptions at
Kīlauea, Hawaii
To: jhi at hi.is



Dear all,

the Friday seminar series continues today (21 October) at 12:30 in the
seminar room on the 3rd floor with a presentation given by:

Bruce Houghton, Gordon A. Macdonald Professor of Volcanology, University of
Hawaii at Manoa.
*“Explaining diversity in the style of very recent pyroclastic eruptions at
Kīlauea, Hawaii”*

Twenty-first century pyroclastic eruptions at Kīlauea, at Halemaʻumaʻu
since 2010 and the 2011 Kamoamoa eruption, have showed features of both
Hawaiian fountaining and Strombolian explosivity. At both sites, activity
was often continuous over similar timescales to Hawaiian fountaining but
was markedly less steady than the classical 20th century high fountains
seen at Pu‘u O‘o and Kīlauea Iki. A significant portion of the gas phase
was released as discrete bubble bursts, in a manner that parallels
Strombolian explosions but with frequencies two or three orders
of magnitude higher than at Stromboli, which permitted sustained but not
steady events.
   The advent of regular deployment of high speed cameras on volcanoes has
revolutionized our ability to make observations of fountaining and
spattering eruption dynamics on very fine time and length scales. On
Kīlauea we have employed this technology since 2013. The modern activity at
the Kīlauea vents provides insight into the passage between Hawaiian
fountaining and Strombolian explosivity. It is highly instructive in terms
of: (a) the diversity of degassing/outgassing possible at basaltic
volcanoes, in general and (b) the controls on mechanically
coupled versus decoupled behavior of the exsolved bubbles.


 Halemaʻumaʻu 2015

 Kamoamoa March 2011




_____________________________
Maria H. Janebo
Postdoctoral Research Fellow

Nordic Volcanological Center
Institute of Earth Sciences
University of Iceland, Askja 223
Sturlugata 7, 101 Reykjavik, Iceland


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-- 
Deirdre Clark, PhD Research Fellow
University of Iceland | Háskóli Íslands
Institute of Earth Sciences
Sturlugata 7, Askja, Room 265
101 Reykjavík, Iceland

+354 525 5414 (Office)
+354 690 5745 (Mobile)
dec2 at hi.is
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