Featured Research

from universities, journals, and other organizations

Autopsy of a eruption: Linking crystal growth to volcano seismicity

Date:
May 24, 2012
Source:
University of Bristol
Summary:
A forensic approach that links changes deep below a volcano to signals at the surface could ultimately help to predict future volcanic eruptions with greater accuracy.

False colour image of zoned orthopyroxene crystal used in forensic-style analysis of Mount St Helens 1980 eruption.
Credit: Kate Saunders

A forensic approach that links changes deep below a volcano to signals at the surface is described by scientists from the University of Bristol in a paper published May 24 in Science. The research could ultimately help to predict future volcanic eruptions with greater accuracy.

Using forensic-style chemical analysis, Dr Kate Saunders and colleagues directly linked seismic observations of the deadly 1980 Mount St. Helens eruption to crystal growth within the magma chamber, the large underground pool of liquid rock beneath the volcano.

Over 500 million people live close to volcanoes which may erupt with little or no clear warning, causing widespread devastation, disruption to aviation and even global effects on climate. Many of the world's volcanoes are monitored for changes such as increases in seismicity or ground deformation. However, an on-going problem for volcanologists is directly linking observations at the surface to processes occurring underground.

Dr Saunders and colleagues studied zoned crystals, which grow concentrically like tree rings within the magma body. Individual zones have subtly different chemical compositions, reflecting the changes in physical conditions within the magma chamber and thus giving an indication of volcanic processes and the timescales over which they occur.

Chemical analysis of the crystals revealed evidence of pulses of magma into a growing chamber within the volcano. Peaks in crystal growth were found to correlate with increased seismicity and gas emissions in the months prior to the eruption.

Dr Saunders said: "Such a correlation between crystal growth and volcanic seismicity has been long anticipated, but to see such clear evidence of this relationship is remarkable."

This forensic approach can be applied to other active volcanoes to shed new light upon the nature and timescale of pre-eruptive activity. This will help scientists to evaluate monitoring signals at restless volcanoes and improve forecasting of future eruptions.

The research was funded by the Natural Environment Research Council (NERC).


Story Source:

The above story is based on materials provided by University of Bristol. Note: Materials may be edited for content and length.


Journal Reference:

  1. K. Saunders, J. Blundy, R. Dohmen, K. Cashman. Linking Petrology and Seismology at an Active Volcano. Science, 2012; 336 (6084): 1023 DOI: 10.1126/science.1220066

Cite This Page:

University of Bristol. "Autopsy of a eruption: Linking crystal growth to volcano seismicity." ScienceDaily. ScienceDaily, 24 May 2012. <www.sciencedaily.com/releases/2012/05/120524143444.htm>.
University of Bristol. (2012, May 24). Autopsy of a eruption: Linking crystal growth to volcano seismicity. ScienceDaily. Retrieved July 22, 2014 from www.sciencedaily.com/releases/2012/05/120524143444.htm
University of Bristol. "Autopsy of a eruption: Linking crystal growth to volcano seismicity." ScienceDaily. www.sciencedaily.com/releases/2012/05/120524143444.htm (accessed July 22, 2014).

Share This




More Earth & Climate News

Tuesday, July 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Shark Sightings a Big Catch for Cape Tourism

Shark Sightings a Big Catch for Cape Tourism

AP (July 21, 2014) — A rise in shark sightings along the shores of Chatham, Massachusetts is driving a surge of eager vacationers to the beach town looking to catch a glimpse of a great white. (July 21) Video provided by AP
Powered by NewsLook.com
Spectacular Lightning Storm Hits London

Spectacular Lightning Storm Hits London

AFP (July 19, 2014) — A spectaCular lightning storm struck the UK overnight Friday. Images of lightning strikes over the Shard and Tower Bridge in central London. Duration: 00:23 Video provided by AFP
Powered by NewsLook.com
A Centuries' Old British Tradition Is Far from a Swan Song

A Centuries' Old British Tradition Is Far from a Swan Song

AFP (July 19, 2014) — As if it weren't enough that the Queen is the Sovereign of the UK and 15 other Commonwealth realms, she is also the owner of all Britain's unmarked swans. Duration: 02:18 Video provided by AFP
Powered by NewsLook.com
Raw: High Winds Push Growing Washington Widlfire

Raw: High Winds Push Growing Washington Widlfire

AP (July 19, 2014) — Pushed by howling, erratic winds, a massive wildfire in north-central Washington was growing rapidly and burning in new directions Saturday. (July 19) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins