skip to primary navigationskip to content
 

Geophysical Research Letters, Volume 43, Issue 4

last modified Mar 22, 2016 10:34 AM

The cover of the current issue of Geophysical Research Letters, An AGU Journal, features a painting by Brandur Bjarnason Karlson showing the main eruption crater Baugur. Brandur, the son of one of the authors of the featured paper, is severely disabled and created the artwork using mouth painting techniques.

The journal features the paper Strike-slip faulting during the 2014 Bárðarbunga-Holuhraun dyke intrusion, central Iceland authored by Thorbjörg Ágústsdóttir, Jennifer Woods, Tim Greenfield, Robert G Green, Robert S White, Tom Winder, Bryndís Bransdóttir, Sveinbjörn Steinthórsson and Heidi Soosalu.

Video showing the propagation of molten rock underground, highlighted by over 30,000 small earthquakes:

Abstract

Over a 13 day period magma propagated laterally from the subglacial Bárðarbunga volcano in the northern rift zone, Iceland. It created > 30,000 earthquakes at 5–7 km depth along a 48 km path before erupting on 29 August 2014. The seismicity, which tracked the dyke propagation, advanced in short bursts at 0.3–4.7 km/h separated by pauses of up to 81 h. During each surge forward, seismicity behind the dyke tip dropped. Moment tensor solutions from the leading edge show exclusively left-lateral strike-slip faulting subparallel to the advancing dyke tip, releasing accumulated strain deficit in the brittle layer of the rift zone. Behind the leading edge, both left- and right-lateral strike-slip earthquakes are observed. The lack of non-double-couple earthquakes implies that the dyke opening was aseismic.

 

RSS Feed Latest news

International team head to Papua New Guinea to measure volcanic carbon degassing

Sep 01, 2016

An international team of scientists is traveling to the islands of Papua New Guinea this September to study degassing from active volcanoes in remote jungles there. Some of these volcanoes are among the most active on Earth, ejecting a significant proportion of global volcanic gases into the atmosphere.

Mistaken Point - Canada's 10th geological World Heritage Site

Aug 02, 2016

The ancient rugged coastline of Mistaken Point on Newfoundland’s Avalon Peninsula face the winds and waves of the Atlantic Ocean. It can be a difficult place to work, but nevertheless it has been a mecca for geologists for over several decades now.

An underestimated Kevan

Jul 21, 2016

Douglas Palmer on the Sedgwick Museum’s giant Pliosaurus cf. kevani in the latest edition of Geoscientist

Oesia – a new tube worm from deep Cambrian times

Jul 21, 2016

Collections up close, Sedgwick Museum of Earth Sciences

View all news

Stories from the field...